William S. Breall, M.D.

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

A16635 Issued in CA

Practice address

2250 Hayes St
Suite 204
San Francisco, CA 94117-1078

Phone

(415) 933-9100

Fax

(415) 933-9133

NPI assigned

Jul 27, 2006

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

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in CA

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

Merit-based Incentive Payment System (MIPS)

Final score

86.2 of 100Reported as group

Quality

57.24

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: william.breall@926612586500.direct.elationemr.com

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.

• Cardiovascular Medical Group

  • Cardiovascular Disease Physician
  • San Francisco, CA
  • NPI 1366583932
  Medicare reassignment NPD

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

{
    "created_epoch": "1153958400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787529600000",
    "number": "1124042635",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2250 HAYES ST",
            "address_2": "SUITE 204",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941171078",
            "telephone_number": "415-933-9100",
            "fax_number": "415-933-9133"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2250 HAYES ST",
            "address_2": "SUITE 204",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941171078",
            "telephone_number": "415-933-9100",
            "fax_number": "415-933-9133"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BREALL",
        "first_name": "WILLIAM",
        "middle_name": "S.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-27",
        "last_updated": "2026-08-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A16635",
            "primary": false
        },
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "CA",
            "license": "A16635",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A166350",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Letizia Maria Bray
• Scott Bray
• Toni J Brayer, MD
• Christine Ann Brazis, LPT
• Breall Group
• Sheila Hurst Brear, BDS (DDS)
• Barry Ellison Breaux Jr., M.D., M.B.A
• Fred Breaux
• Pamela Eleanor Louise Brebner, M.S. CCC-SLP
• Omar J Breedlove, MSW

• Cardiovascular Disease Physician in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Cardiovascular Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 24, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.