John Pierpont Massey IV, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD33079 Issued in DC

Practice address

8901 Rockville Pike
Bethesda, MD 20889-2595

Phone

(301) 295-0196

Fax

(301) 400-0616

NPI assigned

Oct 2, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MD

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

Practice roles

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

• Frederick Health Hospital Inc

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)
• Home Physicians Baltimore, PC

  • Internal Medicine Physician
  • Baltimore, MD
  • NPI 1952591547
  NPD (past)

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

{
    "created_epoch": "1159747200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1739923200000",
    "number": "1609969724",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1855 SHEPHERD ST NW",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200115343",
            "telephone_number": "202-882-4902"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8901 ROCKVILLE PIKE",
            "city": "BETHESDA",
            "state": "MD",
            "postal_code": "208892595",
            "telephone_number": "301-295-0196",
            "fax_number": "301-400-0616"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASSEY",
        "first_name": "JOHN",
        "middle_name": "PIERPONT",
        "name_prefix": "Dr.",
        "name_suffix": "IV",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-10-02",
        "last_updated": "2025-02-19",
        "certification_date": "2025-02-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "DC",
            "license": "MD33079",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Massachusetts Avenue Surgery Center
• Massachusetts Avenue Surgical Consultants LLC
• Andrea Marie Massaro-Cavanaugh, CRNP
• Venus Shirley Masselam, PH.D.
• Silvia Massetti, LICSW
• Massoud Talaie, RPT Inc
• Caitlin Masters, LMSW, LGSW
• Charlotte Masters
• James Neal Masterson, PHARMD
• Margarita E Matamoros, LCSW-C

• Internal Medicine Physician in Bethesda, MD
• Providers in Bethesda, MD by specialty
• Internal Medicine Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 19, 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.