James Matthew Wantuck, M.D.

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A117984 Issued in CA

Practice address

2261 Market St # 86887
San Francisco, CA 94114-1612

Phone

(855) 516-7755

Fax

(650) 672-3681

NPI assigned

Jul 15, 2010

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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 and National Provider Directory roles.

• Prsca Medical Group PC

  • Family Medicine Physician
  • Walnut Creek, CA
  • NPI 1518782234
  NPD Authorized official
• Prsmt Medical Group PC

  • Family Medicine Physician
  • Walnut Creek, CA
  • NPI 1881579837
  NPD Authorized official
• Prsnj Medical Group PC

  • Family Medicine Physician
  • Walnut Creek, CA
  • NPI 1639054687
  NPD Authorized official
• Executive Medicine, Inc.

  • Internal Medicine Physician
  • Duarte, CA
  • NPI 1407291347
  NPD (past)

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

{
    "created_epoch": "1279152000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767744000000",
    "number": "1821301110",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2261 MARKET ST # 86887",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941141612",
            "telephone_number": "855-516-7755",
            "fax_number": "650-672-3681"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2261 MARKET ST # 86887",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941141612",
            "telephone_number": "855-516-7755",
            "fax_number": "650-672-3681"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WANTUCK",
        "first_name": "JAMES",
        "middle_name": "MATTHEW",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2010-07-15",
        "last_updated": "2026-01-07",
        "certification_date": "2026-01-07",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A117984",
            "primary": true
        },
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A117984",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Butsina Martha Wanjala, NP-C
• Rapeepran Wannaviroj
• Jennifer Leigh Wanner, MA MFT
• Shera Wanner, MD
• Esther Wanning, MFT
• Diane W. Wara, M.D.
• William M. Wara, M.D.
• Ravneet Kaur Waraich, MD
• Kiernan Warble, LCSW
• Jennifer Warburg, MFT

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 7, 2026; 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.