Ralph J Blair, M.D.

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

51227 Issued in MA

Practice address

330 Mount Auburn St
Cambridge, MA 02138-5502

Phone

(617) 492-3500

NPI assigned

Jul 11, 2006

Last updated

Sep 11, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

Addresses

Other identifiers 5

Medicare fee-for-service enrollment

Enrolled in MA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Brigham & Womens Physicians Organization Inc

  • Internal Medicine Physician
  • Boston, MA
  • NPI 1033535497
  Medicare reassignment NPD

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1152576000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1275568230",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "147 MILK ST",
            "address_2": "PROVIDER ENROLLMENT - 9TH FLOOR",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "021094806",
            "telephone_number": "617-559-8374",
            "fax_number": "617-421-3487"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "330 MOUNT AUBURN ST",
            "city": "CAMBRIDGE",
            "state": "MA",
            "postal_code": "021385502",
            "telephone_number": "617-492-3500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BLAIR",
        "first_name": "RALPH",
        "middle_name": "J",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-11",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MA",
            "license": "51227",
            "primary": false
        },
        {
            "code": "207RI0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Infectious Disease",
            "state": "MA",
            "license": "51227",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MA",
            "license": "51227",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "BLUE CROSS",
            "identifier": "J05173",
            "state": "MA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "3004481",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "HARVARD PILGRIM",
            "identifier": "PV408",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "NEIGHBORHOOD HEALTH",
            "identifier": "0015282",
            "state": "MA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "TUFTS",
            "identifier": "722575",
            "state": "MA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Jessica Bitar
• Annabelle Bitter, LICSW
• Becky Jeanne Bjorkman, R.N.
• Elizabeth Black-Suchy, CCC-SLP
• Sierra Black
• Lakeyshan Blaise, RN
• Valerie Blanc, LMHC, BC-DMT
• Karyn E. Blanchard, CNM
• Mark Peyton Blanchard, PHD
• Ceevah M Blatman, M.D.

• Hospitalist Physician in Cambridge, MA
• Providers in Cambridge, MA by specialty
• Hospitalist Physician in Massachusetts

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.