One Medical Seniors Group, Inc.

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

Legal business name

ONE MEDICAL SENIORS GROUP, INC.

Practice address

1 Embarcadero Ctr Ste 1900
San Francisco, CA 94111-3723

Phone

(888) 663-6331

Fax

(415) 252-7176

NPI assigned

Aug 14, 2025

Last updated

Aug 14, 2025By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Andrew S Diamond, MDNPI 1154347235

Title

Owner

Phone

(415) 689-3426

Specialties & licenses 3

Addresses

Tax ID family

One Medical Seniors Group Inc4 organizations share this tax ID, including this one

Other organizations with this tax ID 3

Organizations that report the same tax identification number in the National Provider Directory.

• One Medical Seniors Group, Inc.

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1326986050
  NPD tax ID
• One Medical Seniors Group, Inc.

  • Family Medicine Physician
  • Beverly Hills, CA
  • NPI 1699625483
  NPD tax ID
• One Medical Seniors Group, Inc.

  • Family Medicine Physician
  • San Francisco, CA
  • NPI 1962206276
  NPD tax ID

Locations

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Andrew S Diamond, MD, PHD

  • Internal Medicine Physician
  • San Francisco, CA
  • NPI 1154347235
  Authorized official Same address or phone

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

{
    "created_epoch": "1755129600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1755129600000",
    "number": "1497631337",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 EMBARCADERO CTR STE 1900",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941113723",
            "telephone_number": "415-658-6791",
            "fax_number": "415-520-0904"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1 EMBARCADERO CTR STE 1900",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941113723",
            "telephone_number": "888-663-6331",
            "fax_number": "415-252-7176"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "ONE MEDICAL SENIORS GROUP, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2025-08-14",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A",
        "authorized_official_last_name": "DIAMOND",
        "authorized_official_first_name": "ANDREW",
        "authorized_official_middle_name": "S",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "415-689-3426",
        "authorized_official_credential": "MD"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Family Medicine",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Internal Medicine",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Pediatrics",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• One Medical Group, Inc. (One Medical Group)
• One Medical Group, Inc. (One Medical Group)
• One Medical Group, Inc. (One Medical)
• One Medical Group, Inc. (One Medical)
• One Medical Seniors Group, Inc.
• One Medical Seniors Group, Inc.
• Richard Fong One, DDS
• Lynne Elizabeth Oneal, CAADE
• Onederful, Inc.
• Daniel Paul Oneill, MD

• Family Medicine Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Family Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.