| Prefix | Plan Name | |
|---|---|---|
| N2D | Premera Blue Cross | |
| N3T | Premera Blue Cross | |
| N4S | Premera Blue Cross | |
| N6P | Premera Blue Cross | |
| N8P | Premera Blue Cross | |
| NAA | Wellmark BCBS | |
| NAB | BCBS of Arkansas Blue Advantage | |
| NAC | BCBS of Alabama | |
| NAD | BCBS of Tennessee | |
| NAE | Wellmark BCBS | |
| NAF | BCBS of Alabama | |
| NAG | BCBS of Western New York | |
| NAH | Anthem BCBS of Virginia | |
| NAI | BCBS of Texas | |
| NAJ | Anthem BCBS of Kentucky | |
| NAK | Carefirst BCBS of Maryland | |
| NAL | BCBS of Michigan | |
| NAM | Blue Cross of Idaho | |
| NAN | BCBS of Massachusetts | |
| NAO | Blue Shield of California | |
| NAP | Highmark BCBS | |
| NAQ | Unassigned Prefix | |
| NAR | Wellmark BCBS | |
| NAS | Regence BCBS of Washington | |
| NAT | Horizon BCBS of New Jersey | |
| NAU | Excellus BCBS of New York | |
| NAV | BCBS of Massachusetts | |
| NAW | BCBS of Michigan | |
| NAX | BCBS of Michigan | |
| NAY | Premera Blue Cross | |
| NAZ | Blue Shield of California | |
| NBA | Wellmark BCBS | |
| NBB | Regence Blue Cross Blue Shield of Oregon | |
| NBC | BCBS of Delaware | |
| NBD | Wellmark BCBS | |
| NBE | BCBS of Arizona | |
| NBF | Blue Shield of California | |
| NBG | Anthem Blue Cross of California | |
| NBH | Anthem BCBS of Wisconsin | |
| NBI | BCBS of Michigan | |
| NBJ | Unassigned Prefix | |
| NBK | BCBS of Nebraska | |
| NBL | BCBS of Tennessee | |
| NBM | Wellmark BCBS | |
| NBN | BCBS of Nebraska | |
| NBO | Anthem BCBS of Colorado | |
| NBP | Empire BCBS of New York | |
| NBQ | BCBS of North Carolina | |
| NBR | BCBS of Illinois | |
| NBS | Unassigned Prefix | |
| NBT | Excellus BCBS of New York | |
| NBU | BCBS of Michigan | |
| NBV | Unassigned Prefix | |
| NBW | BCBS of Illinois | |
| NBX | Anthem BCBS of Virginia | |
| NBY | BCBS of Massachusetts | |
| NBZ | Horizon BCBS of New Jersey | |
| NCA | BCBS of Tennessee | |
| NCB | BCBS of Illinois | |
| NCC | Unassigned Prefix | |
| NCD | BCBS of Delaware | |
| NCE | BCBS of Michigan | |
| NCF | Anthem Blue Cross of California | |
| NCG | Wellmark BCBS | |
| NCH | BCBS of Michigan | |
| NCI | BCBS of Illinois | |
| NCJ | BCBS of North Carolina | |
| NCK | BCBS of North Carolina | |
| NCL | Horizon BCBS of New Jersey | |
| NCM | Empire BCBS of New York | |
| NCN | BCBS of Illinois | |
| NCO | Blue Shield of California | |
| NCP | BCBS of North Carolina | |
| NCQ | BCBS of Delaware | |
| NCR | BCBS of North Carolina | |
| NCS | BCBS of Arkansas Blue Advantage | |
| NCT | Premera Blue Cross | |
| NCU | Horizon BCBS of New Jersey | |
| NCV | Blue Shield of California | |
| NCW | Premera Blue Cross | |
| NCX | BCBS of Illinois | |
| NCY | BCBS of Illinois | |
| NCZ | Premera Blue Cross | |
| NDA | Unassigned Prefix | |
| NDB | Anthem BCBS of Wisconsin | |
| NDC | Unassigned Prefix | |
| NDD | Horizon BCBS of New Jersey | |
| NDE | BCBS of Michigan | |
| NDF | Anthem BCBS of Indiana | |
| NDG | Anthem Blue Cross of California | |
| NDH | Unassigned Prefix | |
| NDI | Carefirst BCBS of Maryland | |
| NDJ | BCBS of Texas | |
| NDK | Anthem BCBS of New Hampshire | |
| NDL | Unassigned Prefix | |
| NDM | Anthem BCBS of Wisconsin | |
| NDN | Unassigned Prefix | |
| NDO | Blue Shield of California | |
| NDP | Carefirst Administrators | |
| NDQ | Blue Shield of California |
| NDR | Highmark BCBS | |
| NDS | Unassigned Prefix | |
| NDT | Anthem Blue Cross of California | |
| NDU | Anthem Blue Cross of California | |
| NDV | Anthem Blue Cross of California | |
| NDW | Unassigned Prefix | |
| NDX | Unassigned Prefix | |
| NDY | Wellmark BCBS | |
| NDZ | Unassigned Prefix | |
| NEA | BCBS of Illinois | |
| NEB | Horizon BCBS of New Jersey | |
| NEC | BCBS of Illinois | |
| NED | BCBS of Nebraska | |
| NEE | BCBS of Western New York | |
| NEF | BCBS of Western New York | |
| NEG | BCBS of Florida | |
| NEH | Unassigned Prefix | |
| NEI | BCBS of Illinois | |
| NEJ | Unassigned Prefix | |
| NEK | BCBS of Tennessee | |
| NEL | BCBS of Alabama | |
| NEM | BCBS of Delaware | |
| NEN | BCBS of South Carolina | |
| NEO | Unassigned Prefix | |
| NEP | BCBS of Minnesota | |
| NEQ | BCBS of Nebraska | |
| NER | Regence BCBS | |
| NES | BCBS of South Carolina | |
| NET | Anthem BCBS of Connecticut | |
| NEU | BCBS of Minnesota | |
| NEV | Anthem BCBS of Kentucky | |
| NEW | BCBS of Alabama | |
| NEX | Regence BCBS of Oregon | |
| NEY | Unassigned Prefix | |
| NEZ | BCBS of Tennessee | |
| NFA | BCBS of Illinois | |
| NFB | BCBS of Western New York | |
| NFC | Horizon BCBS of New Jersey | |
| NFD | BCBS of Western New York | |
| NFE | Horizon BCBS of New Jersey | |
| NFF | Regence BCBS | |
| NFG | BCBS of Illinois | |
| NFH | Carefirst Administrators | |
| NFI | BCBS of Vermont | |
| NFJ | Excellus BCBS of New York | |
| NFK | Premera Blue Cross | |
| NFL | BCBS of Western New York | |
| NFM | Highmark BCBS | |
| NFN | Highmark BCBS | |
| NFO | Wellmark BCBS | |
| NFP | BCBS of Western New York | |
| NFQ | BCBS of Western New York | |
| NFR | Carefirst Administrators | |
| NFS | BCBS of Florida | |
| NFT | BCBS of Western New York | |
| NFU | BCBS of North Carolina | |
| NFV | Carefirst BCBS of Maryland | |
| NFW | Horizon BCBS of New Jersey | |
| NFX | Premera Blue Cross | |
| NFY | Carefirst BCBS of Maryland | |
| NFZ | BCBS of Massachusetts | |
| NGA | Horizon BCBS of New Jersey | |
| NGB | BCBS of South Carolina | |
| NGC | BCBS of Illinois | |
| NGD | BCBS of South Carolina | |
| NGE | BCBS of Massachusetts | |
| NGF | BCBS of Massachusetts | |
| NGG | Anthem BCBS of Virginia | |
| NGH | Anthem BCBS of New Hampshire | |
| NGI | BCBS of Massachusetts | |
| NGJ | Unassigned Prefix | |
| NGK | BCBS of Massachusetts | |
| NGL | Anthem BCBS of New Hampshire | |
| NGM | Anthem Blue Cross of California | |
| NGN | BCBS of Massachusetts | |
| NGO | Anthem Blue Cross of California | |
| NGP | Wellmark BCBS | |
| NGQ | Carefirst BCBS of Maryland | |
| NGR | BCBS of Michigan | |
| NGS | Anthem BCBS of Virginia | |
| NGT | Blue Shield of California | |
| NGU | BCBS of Western New York | |
| NGV | Anthem BCBS of Ohio | |
| NGW | Blue Shield of California | |
| NGX | BCBS of Illinois | |
| NGY | BCBS of Massachusetts | |
| NGZ | Wellmark BCBS | |
| NHA | Anthem BCBS of New Hampshire | |
| NHB | BCBS of Alabama | |
| NHC | BCBS of Tennessee | |
| NHD | Anthem BCBS of Ohio | |
| NHE | Anthem Blue Cross of California | |
| NHF | BCBS of Alabama | |
| NHG | Capital Blue Cross | |
| NHH | Blue Shield of California | |
| NHI | BCBS of Massachusetts | |
| NHJ | Highmark BCBS | |
| NHK | Highmark BCBS | |
| NHL | Horizon BCBS of New Jersey | |
| NHM | BCBS of Massachusetts |
| NHN | Anthem BCBS of New Hampshire | |
| NHO | Blue Shield of California | |
| NHP | Anthem BCBS of New Hampshire | |
| NHQ | Carefirst Administrators | |
| NHR | BCBS of Minnesota | |
| NHS | Carefirst BCBS of Maryland | |
| NHT | BCBS of Michigan | |
| NHU | Capital Blue Cross | |
| NHV | Horizon BCBS of New Jersey | |
| NHW | BCBS of Kansas City | |
| NHX | Horizon BCBS of New Jersey | |
| NHY | BCBS of Arizona | |
| NHZ | Unassigned Prefix | |
| NIA | Anthem BCBS of Wisconsin | |
| NIB | Unassigned Prefix | |
| NIC | Anthem Blue Cross of California | |
| NID | Regence BCBS | |
| NIE | Anthem BCBS of California | |
| NIF | Unassigned Prefix | |
| NIG | Unassigned Prefix | |
| NIH | BCBS of Massachusetts | |
| NII | Horizon BCBS of New Jersey | |
| NIJ | Anthem BCBS of Ohio | |
| NIK | Unassigned Prefix | |
| NIL | Anthem Blue Cross of California | |
| NIM | Wellmark BCBS | |
| NIN | BCBS of Nebraska | |
| NIO | Wellmark BCBS | |
| NIP | Blue Shield of California | |
| NIQ | Anthem BCBS of Ohio | |
| NIR | Independence Blue Cross | |
| NIS | Unassigned Prefix | |
| NIT | BCBS of Georgia | |
| NIU | BCBS of Florida | |
| NIV | Anthem Blue Cross of California | |
| NIW | Empire BCBS of New York | |
| NIX | Empire BCBS of New York | |
| NIY | BCBS of Kansas City | |
| NIZ | Blue Shield of California | |
| NJA | Anthem BCBS of Georgia | |
| NJB | Highmark BCBS | |
| NJC | Anthem BCBS of Ohio | |
| NJD | Horizon BCBS of New Jersey | |
| NJE | Horizon BCBS of New Jersey | |
| NJF | BCBS of Illinois | |
| NJG | BCBS of Texas | |
| NJH | Horizon BCBS of New Jersey | |
| NJI | Horizon BCBS of New Jersey | |
| NJJ | Horizon BCBS of New Jersey | |
| NJK | Anthem BCBS of Ohio | |
| NJL | BCBS of Michigan | |
| NJM | Anthem Blue Cross of California | |
| NJN | Horizon BCBS of New Jersey | |
| NJO | Horizon BCBS of New Jersey | |
| NJP | Horizon BCBS of New Jersey | |
| NJQ | BCBS of South Carolina | |
| NJR | Horizon BCBS of New Jersey | |
| NJS | Horizon BCBS of New Jersey | |
| NJT | Horizon BCBS of New Jersey | |
| NJU | BCBS of Illinois | |
| NJV | BCBS of Michigan | |
| NJW | Unassigned Prefix | |
| NJX | Horizon BCBS of New Jersey | |
| NJY | BCBS of Alabama | |
| NJZ | Wellmark BCBS | |
| NKA | BCBS of Minnesota | |
| NKB | Anthem Blue Cross of California | |
| NKC | Unassigned Prefix | |
| NKD | Unassigned Prefix | |
| NKE | Anthem BCBS of Ohio | |
| NKF | BCBS of Alabama | |
| NKG | Horizon BCBS of New Jersey | |
| NKH | Horizon BCBS of New Jersey | |
| NKI | Anthem BCBS of Ohio | |
| NKJ | BCBS of Michigan | |
| NKK | BCBS of Michigan | |
| NKL | BCBS of Illinois | |
| NKM | BCBS of Tennessee | |
| NKN | Anthem Blue Cross of California | |
| NKO | Horizon BCBS of New Jersey | |
| NKP | Carefirst BCBS of Maryland | |
| NKQ | BCBS of Michigan | |
| NKR | Anthem BCBS of Indiana | |
| NKS | BCBS of Michigan | |
| NKT | BCBS of Illinois | |
| NKU | Carefirst BCBS of Maryland | |
| NKV | BCBS of Massachusetts | |
| NKW | Anthem BCBS of Ohio | |
| NKX | BCBS of Tennessee | |
| NKY | BCBS of Michigan | |
| NKZ | Unassigned Prefix | |
| NLA | BCBS of Michigan | |
| NLB | BCBS of Illinois | |
| NLC | BCBS of Kansas City | |
| NLD | Horizon BCBS of New Jersey | |
| NLE | Horizon BCBS of New Jersey | |
| NLF | Unassigned Prefix | |
| NLG | Horizon BCBS of New Jersey | |
| NLH | BCBS of Michigan | |
| NLI | BCBS of Alabama |
| NLJ | Carefirst BCBS of Maryland | |
| NLK | Anthem BCBS of Ohio | |
| NLL | BCBS of Illinois | |
| NLM | Highmark BCBS | |
| NLN | Highmark BCBS | |
| NLO | Carefirst BCBS of Maryland | |
| NLP | Blue Shield of California | |
| NLQ | Premera Blue Cross | |
| NLR | BCBS of Texas | |
| NLS | Horizon BCBS of New Jersey | |
| NLT | BCBS of Texas | |
| NLU | BCBS of Massachusetts | |
| NLV | Carefirst BCBS of Maryland | |
| NLW | BCBS of Illinois | |
| NLX | Premera Blue Cross | |
| NLY | Unassigned Prefix | |
| NLZ | Premera Blue Cross | |
| NMA | BCBS of South Carolina | |
| NMB | Unassigned Prefix | |
| NMC | Wellmark BCBS | |
| NMD | BCBS of Kansas City | |
| NME | BCBS of Georgia | |
| NMF | BCBS of South Carolina | |
| NMG | BCBS of South Carolina | |
| NMH | Anthem BCBS of Ohio | |
| NMI | Regence BCBS | |
| NMJ | BCBS of New Mexico | |
| NMK | BCBS of New Mexico | |
| NML | BCBS of South Carolina | |
| NMM | BCBS of New Mexico | |
| NMN | BCBS of Minnesota | |
| NMO | Horizon BCBS of New Jersey | |
| NMP | BCBS of Illinois | |
| NMQ | Unassigned Prefix | |
| NMR | Horizon BCBS of New Jersey | |
| NMS | Carefirst BCBS of Maryland | |
| NMT | BCBS of Illinois | |
| NMU | BCBS of Tennessee | |
| NMV | Empire BCBS of New York | |
| NMW | BCBS of Illinois | |
| NMX | Anthem BCBS of Colorado | |
| NMY | Anthem BCBS of New Hampshire | |
| NMZ | Unassigned Prefix | |
| NNA | BCBS of Tennessee | |
| NNB | BCBS of Tennessee | |
| NNC | Blue Cross Idaho | |
| NND | BCBS of Massachusetts | |
| NNE | BCBS of Massachusetts | |
| NNF | BCBS of Western New York | |
| NNG | BCBS of Arizona | |
| NNH | Anthem BCBS of Virginia | |
| NNI | Horizon BCBS of New Jersey | |
| NNJ | BCBS of Arizona | |
| NNK | Premera Blue Cross | |
| NNL | Unassigned Prefix | |
| NNM | Unassigned Prefix | |
| NNN | BCBS of Illinois | |
| NNO | BCBS of North Carolina | |
| NNP | BCBS of Illinois | |
| NNQ | Premera Blue Cross | |
| NNR | Highmark BCBS | |
| NNS | Anthem BCBS of Virginia | |
| NNT | Premera Blue Cross | |
| NNU | Blue Cross of Northeast Pennsylvania | |
| NNV | Wellmark BCBS | |
| NNW | BCBS of Montana | |
| NNX | Highmark BCBS | |
| NNY | Premera Blue Cross | |
| NNZ | Anthem BCBS of Virginia | |
| NOA | BCBS of North Dakota | |
| NOB | Horizon BCBS of New Jersey | |
| NOC | Horizon BCBS of New Jersey | |
| NOD | Horizon BCBS of New Jersey | |
| NOE | Anthem Blue Cross of California | |
| NOF | BCBS of Michigan | |
| NOG | BCBS of Michigan | |
| NOH | Anthem BCBS of Colorado | |
| NOI | Anthem BCBS of Ohio | |
| NOJ | Unassigned Prefix | |
| NOK | Unassigned Prefix | |
| NOL | Independence Blue Cross | |
| NOM | Unassigned Prefix | |
| NON | BCBS of North Carolina | |
| NOO | Wellmark BCBS | |
| NOP | BCBS of North Dakota | |
| NOQ | Blue Cross of Idaho | |
| NOR | BCBS of Arizona | |
| NOS | Anthem Blue Cross of California | |
| NOT | Anthem BCBS of Ohio | |
| NOU | Anthem Blue Cross of California | |
| NOV | Horizon BCBS of New Jersey | |
| NOW | Blue Shield of California | |
| NOX | Unassigned Prefix | |
| NOY | Blue Shield of California | |
| NOZ | Blue Cross of Idaho | |
| NPA | Carefirst Administrators | |
| NPB | Regence Blue Cross Blue Shield of Oregon | |
| NPC | BCBS of South Carolina | |
| NPD | BCBS of Nebraska | |
| NPE | BCBS of Minnesota |
| NPF | Carefirst BCBS of Maryland | |
| NPG | Carefirst BCBS of Maryland | |
| NPH | Horizon BCBS of New Jersey | |
| NPI | BCBS of Michigan | |
| NPJ | BCBS of Florida | |
| NPK | BCBS of Michigan | |
| NPL | Anthem Blue Cross of California | |
| NPM | Carefirst BCBS of Maryland | |
| NPN | Unassigned Prefix | |
| NPO | Blue Shield of California | |
| NPP | Independence Blue Cross | |
| NPQ | Blue Cross of Idaho | |
| NPR | BCBS of Illinois | |
| NPS | Carefirst BCBS of Maryland | |
| NPT | BCBS of Alabama | |
| NPU | Empire BCBS of New York | |
| NPV | Regence BCBS | |
| NPW | Unassigned Prefix | |
| NPX | BCBS of Rhose Island | |
| NPY | Empire BCBS of New York | |
| NPZ | Blue Cross of Idaho | |
| NQA | BCBS of Massachusetts | |
| NQB | Blue Cross of Idaho | |
| NQC | Regence BCBS | |
| NQD | BCBS of Western New York | |
| NQE | Unassigned Prefix | |
| NQF | Premera Blue Cross | |
| NQG | BCBS of Michigan | |
| NQH | BCBS of Illinois | |
| NQI | BCBS of Michigan | |
| NQJ | Unassigned Prefix | |
| NQK | Blue Cross of Idaho | |
| NQL | BCBS of Massachusetts | |
| NQM | Anthem BCBS of Colorado | |
| NQN | Premera Blue Cross | |
| NQO | Unassigned Prefix | |
| NQP | BCBS of Western New York | |
| NQQ | BCBS of Minnesota | |
| NQR | BCBS of Massachusetts | |
| NQS | BCBS of Illinois | |
| NQT | BCBS of Michigan | |
| NQU | BCBS of Michigan | |
| NQV | BCBS of Massachusetts | |
| NQW | BCBS of Minnesota | |
| NQX | BCBS of Massachusetts | |
| NQY | Anthem Blue Cross of California | |
| NQZ | Unassigned Prefix | |
| NRA | BCBS of Minnesota | |
| NRB | Premera Blue Cross | |
| NRC | BCBS of Minnesota | |
| NRD | Capital Blue Cross | |
| NRE | Capital Blue Cross | |
| NRF | BCBS of Illinois | |
| NRG | BCBS of Illinois | |
| NRH | Premera Blue Cross | |
| NRI | BCBS of Nebraska | |
| NRJ | Anthem Blue Cross of California | |
| NRK | Anthem Blue Cross of California | |
| NRL | Premera Blue Cross | |
| NRM | Carefirst BCBS of Maryland | |
| NRN | BCBS of Nebraska | |
| NRO | BCBS of Georgia | |
| NRP | Unassigned Prefix | |
| NRQ | Horizon BCBS of New Jersey | |
| NRR | Anthem Blue Cross of California | |
| NRS | Premera Blue Cross | |
| NRT | Anthem Blue Cross of California | |
| NRU | Anthem BCBS of Ohio | |
| NRV | Unassigned Prefix | |
| NRW | Horizon BCBS of New Jersey | |
| NRX | Anthem BCBS of Colorado | |
| NRY | Unassigned Prefix | |
| NRZ | Unassigned Prefix | |
| NSA | Anthem Blue Cross of California | |
| NSB | Blue Shield of California | |
| NSC | Blue Shield of California | |
| NSD | BCBS of Michigan | |
| NSE | Blue Shield of California | |
| NSF | Unassigned Prefix | |
| NSG | Horizon BCBS of New Jersey | |
| NSH | Carefirst BCBS of Maryland | |
| NSI | Horizon BCBS of New Jersey | |
| NSJ | Horizon BCBS of New Jersey | |
| NSK | Horizon BCBS of New Jersey | |
| NSL | Blue Shield of California | |
| NSM | Wellmark BCBS | |
| NSN | Blue Shield of California | |
| NSO | Excellus BCBS of New York | |
| NSP | Horizon BCBS of New Jersey | |
| NSQ | Wellmark BCBS | |
| NSR | Blue Cross of Idaho | |
| NSS | BCBS of Michigan | |
| NST | BCBS of Texas | |
| NSU | Anthem BCBS of Ohio | |
| NSV | Wellmark BCBS | |
| NSW | Regence BCBS | |
| NSX | Regence BCBS of Utah | |
| NSY | Horizon BCBS of New Jersey | |
| NSZ | BCBS of Tennessee | |
| NTA | Anthem BCBS of New Hampshire |
| NTB | BCBS of Michigan | |
| NTC | BCBS of Georgia | |
| NTD | BCBS of Massachusetts | |
| NTE | Premera Blue Cross | |
| NTF | Premera Blue Cross | |
| NTG | Unassigned Prefix | |
| NTH | BCBS of Minnesota | |
| NTI | Wellmark BCBS | |
| NTJ | Blue Cross of Northeast Pennsylvania | |
| NTK | BCBS of Texas | |
| NTL | BCBS of Alabama | |
| NTM | BCBS of Illinois | |
| NTN | Anthem Blue Cross of California | |
| NTO | Wellmark BCBS | |
| NTP | Empire BCBS of New York | |
| NTQ | Blue Cross of Northeast Pennsylvania | |
| NTR | Horizon BCBS of New Jersey | |
| NTS | Anthem BCBS of Ohio | |
| NTT | Regence Blue Cross Blue Shield of Oregon | |
| NTU | BCBS of Alabama | |
| NTV | Blue Shield of California | |
| NTW | Horizon BCBS of New Jersey | |
| NTX | Blue Shield of California | |
| NTY | BCBS of North Carolina | |
| NTZ | BCBS of Massachusetts | |
| NUA | Anthem BCBS of Ohio | |
| NUB | Highmark BCBS of West Virginia | |
| NUC | BCBS of Illinois | |
| NUD | BCBS of Nebraska | |
| NUE | BCBS of Kansas City | |
| NUF | Horizon BCBS of New Jersey | |
| NUG | Anthem BCBS of Ohio | |
| NUH | Horizon BCBS of New Jersey | |
| NUI | Regence BCBS | |
| NUJ | Premera Blue Cross | |
| NUK | BCBS of Texas | |
| NUL | Unassigned Prefix | |
| NUM | Carefirst BCBS of Maryland | |
| NUN | Independence Blue Cross | |
| NUO | BCBS of Michigan | |
| NUP | BCBS of Massachusetts | |
| NUQ | BCBS of Massachusetts | |
| NUR | Anthem BCBS of Indiana | |
| NUS | Blue Cross of Idaho | |
| NUT | BCBS of South Carolina | |
| NUU | BCBS of Illinois | |
| NUV | BCBS of Illinois | |
| NUW | Anthem Blue Cross of California | |
| NUX | Capital Blue Cross | |
| NUY | Anthem BCBS of Connecticut | |
| NUZ | Regence Blue Shield of Idaho | |
| NVA | Unassigned Prefix | |
| NVB | BCBS of Massachusetts | |
| NVC | Regence Blue Shield of Idaho | |
| NVD | BCBS of Illinois | |
| NVE | Wellmark BCBS | |
| NVF | Carefirst BCBS of Maryland | |
| NVG | BCBS of Michigan | |
| NVH | Premera Blue Cross | |
| NVI | BCBS of Minnesota | |
| NVJ | Anthem BCBS of Wisconsin | |
| NVK | BCBS of Illinois | |
| NVL | BCBS of Texas | |
| NVM | Wellmark BCBS | |
| NVN | Unassigned Prefix | |
| NVO | Independence Blue Cross | |
| NVP | Horizon BCBS of New Jersey | |
| NVQ | Independence Blue Cross | |
| NVR | Anthem BCBS of Ohio | |
| NVS | BCBS of Alabama | |
| NVT | BCBS of Florida | |
| NVU | Premera Blue Cross | |
| NVV | BCBS of Illinois | |
| NVW | Unassigned Prefix | |
| NVX | BCBS of Illinois | |
| NVY | Horizon BCBS of New Jersey | |
| NVZ | BCBS of Florida | |
| NWA | Unassigned Prefix | |
| NWB | Premera Blue Cross | |
| NWC | BCBS of South Carolina | |
| NWD | Anthem BCBS of Colorado | |
| NWE | Wellmark BCBS | |
| NWF | Capital Blue Cross | |
| NWG | Anthem BCBS of Georgia | |
| NWH | Regence Blue Shield of Washington | |
| NWI | BCBS of Massachusetts | |
| NWJ | Unassigned Prefix | |
| NWK | BCBS of Rhose Island | |
| NWL | BCBS of South Carolina | |
| NWM | Unassigned Prefix | |
| NWN | BCBS of Georgia | |
| NWO | Unassigned Prefix | |
| NWP | BCBS of Minnesota | |
| NWQ | Anthem BCBS of Georgia | |
| NWR | Regence BCBS | |
| NWS | Carefirst Administrators | |
| NWT | Carefirst BCBS of Maryland | |
| NWU | BCBS of Rhose Island | |
| NWV | Premera Blue Cross | |
| NWW | Wellmark BCBS |
| NWX | Blue Cross of Idaho | |
| NWY | BCBS of Rhode Island | |
| NWZ | Blue Cross of Idaho | |
| NXA | BCBS of Western New York | |
| NXB | Anthem BCBS of Connecticut | |
| NXC | Anthem Blue Cross of California | |
| NXD | BCBS of Nebraska | |
| NXE | Anthem BCBS of Ohio | |
| NXF | Unassigned Prefix | |
| NXG | BCBS of Arizona | |
| NXH | Blue Shield of California | |
| NXI | Carefirst BCBS of Maryland | |
| NXJ | Unassigned Prefix | |
| NXK | Carefirst BCBS of Maryland | |
| NXL | Premera Blue Cross | |
| NXM | BCBS of Texas | |
| NXN | Blue Cross of Idaho | |
| NXO | Blue Shield of Northeastern New York | |
| NXP | Blue Shield of California | |
| NXQ | BCBS of Illinois | |
| NXR | BCBS of North Carolina | |
| NXS | Anthem BCBS of Ohio | |
| NXT | Premera Blue Cross | |
| NXU | Empire BCBS of New York | |
| NXV | Anthem BCBS of Nevada | |
| NXW | Premera Blue Cross | |
| NXX | Premera Blue Cross | |
| NXY | Unassigned Prefix | |
| NXZ | BCBS of Georgia | |
| NYA | Empire BCBS of New York | |
| NYB | Empire BCBS of New York | |
| NYC | Empire BCBS of New York | |
| NYD | Empire BCBS of New York | |
| NYE | Blue Shield of Northeastern New York | |
| NYF | Blue Shield of Northeastern New York | |
| NYG | Empire BCBS of New York | |
| NYH | Empire BCBS of New York | |
| NYI | Empire BCBS of New York | |
| NYJ | BCBS of Tennessee | |
| NYK | BCBS of Texas | |
| NYL | Carefirst BCBS of Maryland | |
| NYM | Horizon BCBS of New Jersey | |
| NYN | Unassigned Prefix | |
| NYO | Empire BCBS of New York | |
| NYP | Anthem BCBS of Missouri | |
| NYQ | BCBS of Georgia | |
| NYR | BCBS of Tennessee | |
| NYS | Unassigned Prefix | |
| NYT | Independence Blue Cross | |
| NYU | Carefirst BCBS of Maryland | |
| NYV | Unassigned Prefix | |
| NYW | BCBS of Illinois | |
| NYX | BCBS of Alabama | |
| NYY | Empire BCBS of New York | |
| NYZ | BCBS of Texas | |
| NZA | BCBS of Illinois | |
| NZB | BCBS of South Carolina | |
| NZC | BCBS of South Carolina | |
| NZD | Unassigned Prefix | |
| NZE | Unassigned Prefix | |
| NZF | BCBS of Tennessee | |
| NZG | BCBS of South Carolina | |
| NZH | BCBS of Michigan | |
| NZI | BCBS of Arizona | |
| NZJ | Anthem Blue Cross of California | |
| NZK | Independence Blue Cross | |
| NZL | Wellmark BCBS | |
| NZM | Anthem BCBS of Georgia | |
| NZN | BCBS of South Carolina | |
| NZO | BCBS of Michigan | |
| NZP | BCBS of South Carolina | |
| NZQ | BCBS of Michigan | |
| NZR | Anthem BCBS of Virginia | |
| NZS | Regence BCBS | |
| NZT | BCBS of South Carolina | |
| NZU | BCBS of Nebraska | |
| NZV | Wellmark BCBS | |
| NZW | BCBS of Tennessee | |
| NZX | Horizon BCBS of New Jersey | |
| NZY | BCBS of Illinois | |
| NZZ | Wellmark BCBS |