Ethan Diamond, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

MD600006067 Issued in DC

Practice address

3800 Reservoir Rd NW Dept of
Washington, DC 20007-2113

Phone

(202) 444-8168

Fax

(877) 303-1460

NPI assigned

Mar 29, 2023

Last updated

Aug 6, 2026By 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 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

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.

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1680048000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785974400000",
    "number": "1639873102",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW DEPT OF",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "202-444-8168",
            "fax_number": "877-303-1460"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW DEPT OF",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "202-444-8168",
            "fax_number": "877-303-1460"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAMOND",
        "first_name": "ETHAN",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-03-29",
        "last_updated": "2026-08-06",
        "certification_date": "2026-08-06",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "DC",
            "license": "MD600006067",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Diamond Care, Inc
• Diamond Healthcare Advocates, Inc
• Heather Diamond-Fisch, PSY.D.
• Lisa Marian Diamond-Raab, MA, LPC, ATR, CP
• Carrie Diamond, M.D.
• Shari B Diamond, M.D.
• Susan B Diamond, LICSW, LCSW-C
• Teresa Ann Diamond, M.S.W. , L.I.C.S.W.
• Ultressa Diamond
• Diamond1 Medical Supply and Billing

• Internal Medicine Physician in Washington, DC
• Providers in Washington, DC by specialty
• Internal Medicine Physician in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 6, 2026; 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.