| PAA | Capital Blue Cross of Pennsylvania (PA) |
| PAB | BCBS of Tennessee (TN) |
| PAC | Capital Blue Cross of Pennsylvania (PA) |
| PAD | Anthem BCBS of Georgia (GA) |
| PAE | BCBS of Massachusetts (MA) |
| PAF | Anthem Blue Cross(BC) of California (CA) |
| PAG | Blue Shield (BS) of California |
| PAH | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PAI | Unassigned Prefix |
| PAJ | BCBS of Illinois (IL) |
| PAK | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PAL | Anthem BCBS of Georgia (GA) |
| PAM | Blue Shield (BS) of California (CA) |
| PAN | BCBS of Illinois (IL) |
| PAO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PAP | BCBS of Illinois (IL) |
| PAQ | Anthem BCBS of Ohio (OH) |
| PAR | Unassigned Prefix |
| PAS BCBS Prefix | BCBS of Illinois (IL) |
| PAT | Wellmark |
| PAU | Unassigned Prefix |
| PAV | Anthem BCBS of Virginia (VA) |
| PAW | BCBS of North Carolina (NC) |
| PAX | Anthem BCBS of Georgia (GA) |
| PAY | Excellus BCBS of New York (NY) |
| PAZ | Premera BCBS of Alaska (AK) |
| PBA | BCBS of Massachusetts (MA) |
| PBB | Florida (FL) Blue |
| PBC | Anthem BCBS of Missouri (MO) |
| PBD | Anthem BCBS of Missouri (MO) |
| PBE | Anthem Blue Cross(BC) of California (CA) |
| PBF | Premera BCBS of Alaska (AK) |
| PBG | Blue Shield (BS) of California |
| PBH | BCBS of Louisiana(LA) |
| PBI | BCBS of Western New York (WNY) |
| PBJ | Anthem BCBS of Ohio (OH) |
| PBK | Unassigned Prefix |
| PBL | Blue Shield (BS) of California |
| PBM | Unassigned Prefix |
| PBN | Blue shield(BS) of Northeastern New York (NeNY) |
| PBO | Blue Shield (BS) of California |
| PBP | Wellmark |
| PBQ | Premera Blue Cross (BC) of Alaska (AK) |
| PBR | BCBS of Minnesota (MN) |
| PBS | Unassigned Prefix |
| PBT | BCBS of Minnesota (MN) |
| PBU | BCBS of Illinois (IL) |
| PBV | Premera BCBS of Alaska (AK) |
| PBW | BCBS of Texas (TX) |
| PBX | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PBY | BCBS of Western New York (WNY) |
| PBZ | Empire BCBS of New York (NY) |
| PCA | Empire BCBS of New York (NY) |
| PCB | Unassigned Prefix |
| PCC | Unassigned Prefix |
| PCD | BCBS of Texas (TX) |
| PCE | Unassigned Prefix |
| PCF | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PCG | BCBS of Kansas City |
| PCH | BCBS of North Carolina (NC) |
| PCI | Blue Shield (BS) of California |
| PCJ | Anthem BCBS of Georgia (GA) |
| PCK | Empire BCBS of New York (NY) |
| PCL | BCBS of Arizona (AZ) |
| PCM | Premera BCBS of Alaska (AK) |
| PCN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PCO | Anthem BCBS of Ohio (OH) |
| PCP | Anthem BCBS of Colorado (CO) |
| PCQ | Unassigned Prefix |
| PCR | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PCS | Wellmark |
| PCT | Anthem BCBS of Ohio (OH) |
| PCU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PCV | Blue Shield (BS) of California |
| PCW | Anthem BCBS of Ohio (OH) |
| PCX | Wellmark |
| PCY | Anthem BCBS of Ohio (OH) |
| PCZ | Unassigned Prefix |
| PDA | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PDB | BCBS of Texas (TX) |
| PDC | Anthem BCBS of Georgia (GA) |
| PDD | Unassigned Prefix |
| PDE | Blue Shield (BS) of California |
| PDF | Anthem BCBS of Ohio (OH) |
| PDG | BCBS of Tennessee (TN) |
| PDH | Anthem BCBS of Colorado (CO) |
| PDI | Wellmark |
| PDJ | Wellmark |
| PDK | Anthem Blue Cross(BC) of California (CA) |
| PDL | Anthem Blue Cross(BC) of California (CA) |
| PDM | Unassigned Prefix |
| PDN | BCBS of Minnesota (MN) |
| PDO | BCBS of Alabama (AL) |
| PDP | BCBS of Minnesota (MN) |
| PDQ | Blue Shield (BS) of California |
| PDR | Regence BCBS |
| PDS | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PDT | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PDU | BCBS of Illinois (IL) |
| PDV | Wellmark |
| PDW | BCBS of Illinois (IL) |
| PDX | BCBS Blue Care Network Michigan (MI) |
| PDY | BCBS of Illinois (IL) |
| PDZ | BCBS of Alabama (AL) |
| PEA | Anthem BCBS of Colorado (CO) |
| PEB | Capital Blue Cross of Pennsylvania (PA) |
| PEC | BCBS of Texas (TX) |
| PED | Anthem BCBS of Ohio (OH) |
| PEE | Unassigned Prefix |
| PEF | BCBS of Alabama (AL) |
| PEG | BCBS of Texas (TX) |
| PEH | Blue shield(BS) of Northeastern New York (NeNY) |
| PEI | Unassigned Prefix |
| PEJ | Blue Cross (BC) of Idaho (ID) |
| PEK | Empire BCBS of New York (NY) |
| PEL | Anthem BCBS of Missouri (MO) |
| PEM | BCBS of Minnesota (MN) |
| PEN | Unassigned Prefix |
| PEO | Unassigned Prefix |
| PEP | Blue Shield (BS) of California |
| PEQ | Unassigned Prefix |
| PER | Wellmark |
| PES | BCBS of Texas (TX) |
| PET | BCBS of Rhode Island (RI) |
| PEU | Anthem BCBS of Missouri (MO) |
| PEV | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PEW | Unassigned Prefix |
| PEX | BCBS of Alabama (AL) |
| PEY | Unassigned Prefix |
| PEZ | Unassigned Prefix |
| PFA | Highmark Blue Shield (BS) of Pennsylvania (PA) |
| PFB | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PFC | Blue Shield (BS) of California |
| PFD | Blue Shield (BS) of California |
| PFE | Anthem BCBS of Virginia (VA) |
| PFF | Anthem BCBS of Virginia (VA) |
| PFG | BCBS of Kansas City |
| PFH | Anthem BCBS of Wisconsin (WI) |
| PFI | Highmark BCBS of Pennsylvania (PA) |
| PFJ | BCBS of Illinois (IL) |
| PFK | BCBS of Massachusetts (MA) |
| PFL | Unassigned Prefix |
| PFM | Regence BCBS |
| PFN | Unassigned Prefix |
| PFO | Unassigned Prefix |
| PFP | Premera BCBS of Alaska (AK) |
| PFQ | Blue Shield (BS) of California |
| PFR | Horizon BCBS of New Jersey (NJ) |
| PFS | Anthem Blue Cross(BC) of California (CA) |
| PFT | Anthem BCBS of Virginia (VA) |
| PFU | Florida (FL) Blue |
| PFV | Unassigned Prefix |
| PFW | Anthem BCBS of Missouri (MO) |
| PFX | Capital Blue Cross of Pennsylvania (PA) |
| PFY | BCBS of Illinois (IL) |
| PFZ | Horizon BCBS of New Jersey (NJ) |
| PGA | BCBS of North Carolina (NC) |
| PGB | Unassigned Prefix |
| PGC | BCBS of Tennessee (TN) |
| PGD | Blue Shield (BS) of California |
| PGE | BCBS of Arizona (AZ) |
| PGF | Unassigned Prefix |
| PGG | Anthem BCBS of Wisconsin (WI) |
| PGH | Unassigned Prefix |
| PGI | BCBS of Illinois (IL) |
| PGJ | Unassigned Prefix |
| PGK | BCBS of Tennessee (TN) |
| PGL | Unassigned Prefix |
| PGM | Highmark BCBS of Pennsylvania (PA) |
| PGN | Unassigned Prefix |
| PGO | Anthem BCBS of Ohio (OH) |
| PGP | Florida (FL) Blue |
| PGQ | Arkansas (AR) Blue Cross |
| PGR | BCBS of Kansas City |
| PGS | Anthem BCBS of Ohio (OH) |
| PGT | Unassigned Prefix |
| PGU | Anthem BCBS of Georgia (GA) |
| PGV | Anthem BCBS of Georgia (GA) |
| PGW | BCBS of Alabama (AL) |
| PGX | BCBS of Alabama (AL) |
| PGY | Empire BCBS of New York (NY) |
| PGZ | BCBS of Illinois (IL) |
| PHA | Unassigned Prefix |
| PHB | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PHC | Anthem BCBS of Wisconsin (WI) |
| PHD | Unassigned Prefix |
| PHE | Unassigned Prefix |
| PHF | BCBS of Kansas |
| PHG | Blue Shield (BS) of California |
| PHH | Unassigned Prefix |
| PHI | Blue Shield (BS) of California |
| PHJ | Capital Blue Cross of Pennsylvania (PA) |
| PHK | Unassigned Prefix |
| PHL | Blue Shield (BS) of California |
| PHM | Anthem Blue Cross(BC) of California (CA) |
| PHN | BCBS of Rhode Island (RI) |
| PHO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PHP | Anthem BCBS of Georgia (GA) |
| PHQ | Anthem BCBS of Georgia (GA) |
| PHR | Unassigned Prefix |
| PHS | Anthem BCBS of Georgia (GA) |
| PHT | BCBS of Alabama (AL) |
| PHU BCBS Prefix | Blue Shield (BS) of California |
| PHV | Unassigned Prefix |
| PHW | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PHX | Anthem BCBS of Ohio (OH) |
| PHY | Empire BCBS of New York (NY) |
| PHZ | Unassigned Prefix |
| PIA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PIB | BCBS of Minnesota (MN) |
| PIC | Unassigned Prefix |
| PID | Anthem BCBS of Wisconsin (WI) |
| PIE | Unassigned Prefix |
| PIF | Wellmark |
| PIG | Unassigned Prefix |
| PIH | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PII | Wellmark |
| PIJ | Unassigned Prefix |
| PIK | Anthem BCBS of Ohio (OH) |
| PIL | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PIM | Anthem BCBS of Wisconsin (WI) |
| PIN | Unassigned Prefix |
| PIO | BCBS of Tennessee (TN) |
| PIP | Arkansas (AR) Blue Cross |
| PIQ | Arkansas (AR) Blue Cross |
| PIR | Unassigned Prefix |
| PIS | Unassigned Prefix |
| PIT | BCBS of Massachusetts (MA) |
| PIU | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PIV | Unassigned Prefix |
| PIW | Highmark BCBS of Pennsylvania (PA) |
| PIX | BCBS of Alabama (AL) |
| PIY | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PIZ | BCBS of Alabama (AL) |
| PJA | BCBS of Alabama (AL) |
| PJB | Regence BCBS |
| PJC | Anthem Blue Cross(BC) of California (CA) |
| PJD | BCBS Blue Care Network Michigan (MI) |
| PJE | Regence BCBS |
| PJF | Wellmark |
| PJG | Unassigned Prefix |
| PJH | Unassigned Prefix |
| PJI | BCBS Blue Care Network Michigan (MI) |
| PJJ | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PJK | BCBS of South Carolina (SC) / Southcarolinablues |
| PJL | BCBS of Western New York (WNY) |
| PJM | Unassigned Prefix |
| PJN | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PJO | BCBS of North Carolina (NC) |
| PJP | BCBS of Illinois (IL) |
| PJQ | Wellmark |
| PJR | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PJS | BCBS of Illinois (IL) |
| PJT | BCBS of Illinois (IL) |
| PJU | Highmark BCBS of Pennsylvania (PA) |
| PJV | Anthem BCBS of Georgia (GA) |
| PJW | Anthem BCBS of Ohio (OH) |
| PJX | Anthem BCBS of Georgia (GA) |
| PJY | Horizon BCBS of New Jersey (NJ) |
| PJZ | Florida (FL) Blue |
| PKA | BCBS of Illinois (IL) |
| PKB | Florida Explore My Plan |
| PKC | Unassigned Prefix |
| PKD | Blue Shield (BS) of California |
| PKE | Unassigned Prefix |
| PKF | BCBS of Alabama (AL) |
| PKG | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PKH | Anthem BCBS of Virginia (VA) |
| PKI | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PKJ | Anthem BCBS of Ohio (OH) |
| PKK | Unassigned Prefix |
| PKL | BCBS Blue Care Network Michigan (MI) |
| PKM | BCBS Blue Care Network Michigan (MI) |
| PKN | Highmark BCBS of Pennsylvania (PA) |
| PKO | Premera BCBS of Alaska (AK) |
| PKP | Horizon BCBS of New Jersey (NJ) |
| PKQ | Anthem Blue Cross(BC) of California (CA) |
| PKR | Wellmark |
| PKS | Anthem Blue Cross(BC) of California (CA) |
| PKT | BCBS of Minnesota (MN) |
| PKU | Unassigned Prefix |
| PKV | BCBS of Louisiana(LA) |
| PKW | Anthem BCBS of Ohio (OH) |
| PKX | Anthem BCBS of Connecticut (CT) |
| PKY | Unassigned Prefix |
| PKZ | Unassigned Prefix |
| PLA | Unassigned Prefix |
| PLB | Unassigned Prefix |
| PLC | BCBS of Alabama (AL) |
| PLD | Unassigned Prefix |
| PLE | BCBS Blue Care Network Michigan (MI) |
| PLF | Unassigned Prefix |
| PLG | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PLH | Anthem BCBS of Ohio (OH) |
| PLI | Unassigned Prefix |
| PLJ | Empire BCBS of New York (NY) |
| PLK | Unassigned Prefix |
| PLL | Anthem Blue Cross(BC) of California (CA) |
| PLM | BCBS of Massachusetts (MA) |
| PLN | Anthem BCBS of Ohio (OH) |
| PLO | BCBS of Massachusetts (MA) |
| PLP | BCBS of Minnesota (MN) |
| PLQ | Unassigned Prefix |
| PLR | BCBS of Western New York (WNY) |
| PLS | Wellmark |
| PLT | Empire BCBS of New York (NY) |
| PLU | BCBS of Illinois (IL) |
| PLV | Anthem BCBS of Virginia (VA) |
| PLW | Anthem BCBS of Ohio (OH) |
| PLX | Unassigned Prefix |
| PLY | Unassigned Prefix |
| PLZ | Unassigned Prefix |
| PMA | BCBS of Arizona (AZ) |
| PMB BCBS Prefix | BCBS of Illinois (IL) |
| PMC | Anthem BCBS of Ohio (OH) |
| PMD | BCBS of North Carolina (NC) |
| PME | BCBS of Texas (TX) |
| PMF | Unassigned Prefix |
| PMG | Anthem BCBS of Ohio (OH) |
| PMH | Unassigned Prefix |
| PMI | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PMJ | Unassigned Prefix |
| PMK | BCBS of Arizona (AZ) |
| PML | Unassigned Prefix |
| PMM | Anthem BCBS of Indiana (IN) |
| PMN | Unassigned Prefix |
| PMO | BCBS of South Carolina (SC) / Southcarolinablues |
| PMP | Wellmark |
| PMQ | Wellmark |
| PMR | Florida (FL) Blue |
| PMS | Blue Shield (BS) of California (CA) |
| PMT | Premera BCBS of Alaska (AK) |
| PMU | BCBS of Minnesota (MN) |
| PMV | BCBS of Louisiana(LA) |
| PMW | Unassigned Prefix |
| PMX | BCBS of Illinois (IL) |
| PMY | Anthem BCBS of Missouri (MO) |
| PMZ | BCBS of South Carolina (SC) / Southcarolinablues |
| PNA | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PNB | Unassigned Prefix |
| PNC | Premera BCBS of Alaska (AK) |
| PND | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PNE | Blue Shield (BS) of California |
| PNF | BCBS of Illinois (IL) |
| PNG | Unassigned Prefix |
| PNH | Capital Blue Cross of Pennsylvania (PA) |
| PNI | BCBS Blue Care Network Michigan (MI) |
| PNJ | Unassigned Prefix |
| PNK | BCBS of Illinois (IL) |
| PNL | Capital Blue Cross of Pennsylvania (PA) |
| PNM | Highmark BCBS of Pennsylvania (PA) |
| PNN | Wellmark |
| PNO | Anthem Blue Cross(BC) of California (CA) |
| PNP | Anthem Blue Cross(BC) of California (CA) |
| PNQ | Premera BCBS of Alaska (AK) |
| PNR | BCBS of Minnesota (MN) |
| PNS | Wellmark |
| PNT | Premera BCBS of Alaska (AK) |
| PNU | BCBS of Texas (TX) |
| PNV | Unassigned Prefix |
| PNW | Wellmark |
| PNX | Highmark BCBS of Pennsylvania (PA) |
| PNY | Unassigned Prefix |
| PNZ | Wellmark |
| POA | Anthem BCBS of Ohio (OH) |
| POB | Wellmark |
| POC | Unassigned Prefix |
| POD | Blue Shield (BS) of California |
| POE | Blue Shield (BS) of California |
| POF | Blue Cross (BC) of Idaho (ID) |
| POG | Anthem Blue Cross(BC) of California (CA) |
| POH | Anthem Blue Cross(BC) of California (CA) |
| POI | Highmark BCBS of Pennsylvania (PA) |
| POJ | Unassigned Prefix |
| POK | Blue Shield (BS) of California |
| POL | BCBS of Kansas City |
| POM | Unassigned Prefix |
| PON | Premera BCBS of Alaska (AK) |
| POO | Blue Shield (BS) of California |
| POP | Blue Shield (BS) of California |
| POQ | BCBS of Massachusetts (MA) |
| POR | Wellmark |
| POS | Unassigned Prefix |
| POT | Blue Shield (BS) of California |
| POU | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| POV | Anthem Blue Cross(BC) of California (CA) |
| POW | Blue Shield (BS) of California |
| POX | Unassigned Prefix |
| POY | Blue Shield (BS) of California |
| POZ | Unassigned Prefix |
| PPA BCBS Prefix | BCBS of Alabama (AL) |
| PPB | Premera BCBS of Alaska (AK) |
| PPC | Anthem BCBS of Virginia (VA) |
| PPD | Anthem BCBS of Kentucky (KY) |
| PPE | Highmark BCBS of Pennsylvania (PA) |
| PPF | BCBS of Illinois (IL) |
| PPG | Highmark BCBS of Pennsylvania (PA) |
| PPH | Unassigned Prefix |
| PPI | Anthem BCBS of Virginia (VA) |
| PPJ | BCBS of Minnesota (MN) |
| PPK | BCBS of Illinois (IL) |
| PPL | Regence BCBS |
| PPM | Highmark BCBS of Pennsylvania (PA) |
| PPN | Unassigned Prefix |
| PPO | BCBS of Illinois (IL) |
| PPP | BCBS of Illinois (IL) |
| PPQ | BCBS of Illinois (IL) |
| PPR | BCBS of Alabama (AL) |
| PPS | Premera BCBS of Alaska (AK) |
| PPT | Anthem BCBS of Georgia (GA) |
| PPU | BCBS of Illinois (IL) |
| PPV | Blue Cross (BC) of Idaho (ID) |
| PPW | Highmark BCBS of Pennsylvania (PA) |
| PPX | Florida (FL) Blue |
| PPY | BCBS of Minnesota (MN) |
| PPZ | Unassigned Prefix |
| PQA | Premera BCBS of Alaska (AK) |
| PQB | BCBS of Alabama (AL) |
| PQC | Unassigned Prefix |
| PQD | Anthem Blue Cross(BC) of California (CA) |
| PQE | BCBS of Massachusetts (MA) |
| PQF | Unassigned Prefix |
| PQG | Empire BCBS of New York (NY) |
| PQH | Premera BCBS of Alaska (AK) |
| PQI | BCBS of Tennessee (TN) |
| PQJ | BCBS of Minnesota (MN) |
| PQK | BCBS of Kansas City |
| PQL | Unassigned Prefix |
| PQM | Highmark BCBS of Pennsylvania (PA) |
| PQN | Unassigned Prefix |
| PQO | Blue Cross (BC) of Idaho (ID) |
| PQP | Premera BCBS of Alaska (AK) |
| PQQ | Anthem BCBS of Colorado (CO) |
| PQR | Wellmark |
| PQS | BCBS of Massachusetts (MA) |
| PQT | Regence BCBS |
| PQU | Blue Shield (BS) of California |
| PQV | Anthem Blue Cross(BC) of California (CA) |
| PQW | BCBS of Massachusetts (MA) |
| PQX | Anthem Blue Cross(BC) of California (CA) |
| PQY | Unassigned Prefix |
| PQZ | Unassigned Prefix |
| PRA | BCBS of Alabama (AL) |
| PRB | BCBS of Western New York (WNY) |
| PRC | Blue Shield (BS) of California |
| PRD | BCBS of Alabama (AL) |
| PRE | BCBS of Nebraska (NE) |
| PRF | Empire BCBS of New York (NY) |
| PRG | Unassigned Prefix |
| PRH | Anthem BCBS of Ohio (OH) |
| PRI | Unassigned Prefix |
| PRJ | Anthem BCBS of Virginia (VA) |
| PRK | Unassigned Prefix |
| PRL | Arkansas (AR) Blue Cross |
| PRM | BCBS of Tennessee (TN) |
| PRN | Unassigned Prefix |
| PRO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PRP | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PRQ | Wellmark |
| PRR | Anthem BCBS of Ohio (OH) |
| PRS | Unassigned Prefix |
| PRT | Regence BCBS |
| PRU | BCBS of Western New York (WNY) |
| PRV | BCBS of Alabama (AL) |
| PRW | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PRX | BCBS of Alabama (AL) |
| PRY | BCBS of Kansas City |
| PRZ | BCBS of Illinois (IL) |
| PSA | BCBS of Massachusetts (MA) |
| PSB | BCBS of Texas (TX) |
| PSC | BCBS of Illinois (IL) |
| PSD | Unassigned Prefix |
| PSE | Blue Shield (BS) of California |
| PSF | Unassigned Prefix |
| PSG | Unassigned Prefix |
| PSH | Anthem BCBS of Connecticut (CT) |
| PSI | Blue Shield (BS) of California |
| PSJ | Unassigned Prefix |
| PSK | Unassigned Prefix |
| PSL | Anthem BCBS of Virginia (VA) |
| PSM | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PSN | Unassigned Prefix |
| PSO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PSP | Blue Shield (BS) of California |
| PSQ | Anthem BCBS of Georgia (GA) |
| PSR | Unassigned Prefix |
| PSS | Wellmark |
| PST | BCBS of North Carolina (NC) |
| PSU | Premera BCBS of Alaska (AK) |
| PSV | Anthem BCBS of Ohio (OH) |
| PSW | Unassigned Prefix |
| PSX | Anthem BCBS of Nevada (NV) |
| PSY | Anthem BCBS of Connecticut (CT) |
| PSZ | BCBS of Louisiana(LA) |
| PTA | Anthem Blue Cross(BC) of California (CA) |
| PTB | Blue Shield (BS) of California |
| PTC | Blue Shield (BS) of California |
| PTD | BCBS of Kansas City |
| PTE | BCBS of Texas (TX) |
| PTF | Unassigned Prefix |
| PTG | Anthem BCBS of Ohio (OH) |
| PTH | Anthem BCBS of Connecticut (CT) |
| PTI | Wellmark |
| PTJ | Unassigned Prefix |
| PTK | Capital Blue Cross of Pennsylvania (PA) |
| PTL | BCBS of Illinois (IL) |
| PTM | Capital Blue Cross of Pennsylvania (PA) |
| PTN | BCBS of Illinois (IL) |
| PTO | Anthem BCBS of Ohio (OH) |
| PTP | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PTQ | Empire BCBS of New York (NY) |
| PTR | Arkansas (AR) Blue Cross |
| PTS | Anthem BCBS of Kentucky (KY) |
| PTT | BCBS of Tennessee (TN) |
| PTU | Anthem BCBS of Georgia (GA) |
| PTV | Anthem BCBS of Wisconsin (WI) |
| PTW | BCBS of Rhode Island (RI) |
| PTX | BCBS of Montana (MT) |
| PTY | Anthem BCBS of Indiana (IN) |
| PTZ | Unassigned Prefix |
| PUA | BCBS Blue Care Network Michigan (MI) |
| PUB | Horizon BCBS of New Jersey (NJ) |
| PUC | Wellmark |
| PUD | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PUE | Blue Shield (BS) of California |
| PUF | Unassigned Prefix |
| PUG | BCBS Blue Care Network Michigan (MI) |
| PUH | Highmark BCBS of Pennsylvania (PA) |
| PUI | Unassigned Prefix |
| PUJ | Anthem BCBS of Georgia (GA) |
| PUK | BCBS of South Carolina (SC) / Southcarolinablues |
| PUL | Premera BCBS of Alaska (AK) |
| PUM | BCBS of South Carolina (SC) / Southcarolinablues |
| PUN | Unassigned Prefix |
| PUO | BCBS of Arizona (AZ) |
| PUP | Florida (FL) Blue |
| PUQ | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PUR | Wellmark |
| PUS | BCBS of Arizona (AZ) |
| PUT | BCBS Blue Care Network Michigan (MI) |
| PUU | BCBS Blue Care Network Michigan (MI) |
| PUV | BCBS Blue Care Network Michigan (MI) |
| PUW | BCBS of Massachusetts (MA) |
| PUX | Premera BCBS of Alaska (AK) |
| PUY | Wellmark |
| PUZ | Unassigned Prefix |
| PVA | BCBS of Kansas City |
| PVB | Wellmark |
| PVC | BCBS of Rhode Island (RI) |
| PVD | BCBS of Illinois (IL) |
| PVE | Unassigned Prefix |
| PVF | BCBS of Tennessee (TN) |
| PVG | Anthem Blue Cross(BC) of California (CA) |
| PVH | BCBS of Alabama (AL) |
| PVI | Unassigned Prefix |
| PVJ | Anthem BCBS of Ohio (OH) |
| PVK | Anthem Blue Cross(BC) of California (CA) |
| PVL | Unassigned Prefix |
| PVM | Unassigned Prefix |
| PVN | Anthem BCBS of Virginia (VA) |
| PVO | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PVP | Anthem Blue Cross(BC) of California (CA) |
| PVQ | Unassigned Prefix |
| PVR | Anthem BCBS of Ohio (OH) |
| PVS | Unassigned Prefix |
| PVT | Anthem BCBS of Ohio (OH) |
| PVU | Unassigned Prefix |
| PVV | BCBS of South Carolina (SC) / Southcarolinablues |
| PVW | Florida (FL) Blue |
| PVX | BCBS of North Carolina (NC) |
| PVY | BCBS of North Carolina (NC) |
| PVZ | Unassigned Prefix |
| PWA | Florida (FL) Blue |
| PWB | Anthem BCBS of Virginia (VA) |
| PWC | Regence BCBS |
| PWD | BCBS of Illinois (IL) |
| PWE | Empire BCBS of New York (NY) |
| PWF | Anthem Blue Cross(BC) of California (CA) |
| PWG | Anthem BCBS of Virginia (VA) |
| PWH | Unassigned Prefix |
| PWI | Unassigned Prefix |
| PWJ | Blue Cross (BC) of North Carolina (NC) |
| PWK | BCBS of Massachusetts (MA) |
| PWL | Anthem BCBS of Colorado (CO) |
| PWM | Wellmark |
| PWN | Anthem BCBS of Ohio (OH) |
| PWO | Blue Shield (BS) of California |
| PWP | Empire BCBS of New York (NY) |
| PWQ | Unassigned Prefix |
| PWR | Unassigned Prefix |
| PWS | Anthem BCBS of Virginia (VA) |
| PWT | Anthem BCBS of Georgia (GA) |
| PWU | Wellmark |
| PWV | BCBS of Illinois (IL) |
| PWW | BCBS of Illinois (IL) |
| PWX | Blue Cross (BC) of Idaho (ID) |
| PWY | Unassigned Prefix |
| PWZ | BCBS of Rhode Island (RI) |
| PXA | Anthem BCBS of Ohio (OH) |
| PXB | Florida (FL) Blue |
| PXC | Unassigned Prefix |
| PXD | BCBS of Arizona (AZ) |
| PXE | Premera BCBS of Alaska (AK) |
| PXF | Unassigned Prefix |
| PXG | Arkansas (AR) Blue Cross |
| PXH | Unassigned Prefix |
| PXI | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PXJ | Florida (FL) Blue |
| PXK | Unassigned Prefix |
| PXL | BCBS of Massachusetts (MA) |
| PXM | Unassigned Prefix |
| PXN BCBS Prefix | Florida (FL) Blue |
| PXO | BCBS of Arizona (AZ) |
| PXP | Anthem BCBS of Kentucky (KY) |
| PXQ | Anthem BCBS of Wisconsin (WI) |
| PXR | Anthem BCBS of Ohio (OH) |
| PXS | BCBS of Illinois (IL) |
| PXT | Unassigned Prefix |
| PXU | BCBS Blue Care Network Michigan (MI) |
| PXV | Capital Blue Cross of Pennsylvania (PA) |
| PXW | BCBS Blue Care Network Michigan (MI) |
| PXX | Unassigned Prefix |
| PXY | Unassigned Prefix |
| PXZ | Unassigned Prefix |
| PYA | Blue Shield (BS) of California |
| PYB | Empire BCBS of New York (NY) |
| PYC | Unassigned Prefix |
| PYD | Unassigned Prefix |
| PYE | BCBS of Illinois (IL) |
| PYF | Premera BCBS of Alaska (AK) |
| PYG | Carefirst BCBS of Maryland (MD)/ District of Columbia (DC) and Northern Virginia (VA) |
| PYH | BCBS of Texas (TX) |
| PYI | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PYJ | BCBS Blue Care Network Michigan (MI) |
| PYK | Anthem BCBS of Wisconsin (WI) |
| PYL | BCBS of Western New York (WNY) |
| PYM | Wellmark |
| PYN BCBS Prefix | Anthem BCBS of Ohio (OH) |
| PYO | BCBS of North Carolina (NC) |
| PYP | Anthem BCBS of Virginia (VA) |
| PYQ | Anthem BCBS of Ohio (OH) |
| PYR | Unassigned Prefix |
| PYS | Anthem BCBS of Ohio (OH) |
| PYT | Unassigned Prefix |
| PYU | Unassigned Prefix |
| PYV | Unassigned Prefix |
| PYW | Unassigned Prefix |
| PYX | Unassigned Prefix |
| PYY | Wellmark |
| PYZ | Anthem BCBS of Georgia (GA) |
| PZA | BCBS of Texas (TX) |
| PZB | Anthem BCBS of Ohio (OH) |
| PZC | Unassigned Prefix |
| PZD | BCBS of Illinois (IL) |
| PZE | Unassigned Prefix |
| PZF | Blue Shield (BS) of California |
| PZG | Anthem Blue Cross(BC) of California (CA) |
| PZH | Unassigned Prefix |
| PZI | BCBS of South Carolina (SC) / Southcarolinablues |
| PZJ | BCBS Blue Care Network Michigan (MI) |
| PZK | Unassigned Prefix |
| PZL | Unassigned Prefix |
| PZM | Anthem Blue Cross(BC) of California (CA) |
| PZN | Anthem BCBS of Ohio (OH) |
| PZO | Independence Blue Cross(BC) of Philadelphia(Phi) and Southeastern Pennsylvania(PA) |
| PZP | Unassigned Prefix |
| PZQ | Florida (FL) Blue |
| PZR | Empire BCBS of New York (NY) |
| PZS | Wellmark |
| PZT | Wellmark |
| PZU | Unassigned Prefix |
| PZV | Anthem BCBS of Virginia (VA) |
| PZW | Wellmark |
| PZX | Unassigned Prefix |
| PZY | BCBS of Western New York (WNY) |
| PZZ | BCBS of Western New York (WNY) |
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