Sylvia Emma Keiser, DO

Primary specialty

Gastroenterology PhysicianTaxonomy code 207RG0100X

License

W6278 Issued in TX

Practice address

8435 Wurzbach Rd
San Antonio, TX 78229-3921

Phone

(210) 450-9800

NPI assigned

Apr 29, 2020

Sex

Female

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

Enrolled in TX

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

Specialty

GastroenterologyAlso: Internal Medicine

Education

Other, 2020

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Hospital & facility affiliations

• University Health System Hospital, San Antonio, TX, CCN 450213

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Interoperability endpoints

• Direct secure messaging: skeiser33410@direct.utmsa.com

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Bexar County Hospital District

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1821011248
  Care Compare affiliation

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

{
    "created_epoch": "1588118400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782259200000",
    "number": "1366063463",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8435 WURZBACH RD",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782293921",
            "telephone_number": "210-450-9800"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8435 WURZBACH RD",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782293921",
            "telephone_number": "210-450-9800"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KEISER",
        "first_name": "SYLVIA",
        "middle_name": "EMMA",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-04-29",
        "last_updated": "2026-06-24",
        "certification_date": "2026-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "W6278",
            "primary": false
        },
        {
            "code": "207RG0100X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Gastroenterology",
            "state": "TX",
            "license": "W6278",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ashley Allyn Keiler-Green, M.D.
• Richard J Keilholz, M. ED.
• Gina L Keim, PA-C
• Richard Joseph Keim Jr., PA-C
• Karl Keiser, DDS
• Keisha L. Loftin, M.D., P.a.
• Keith Burchill PLLC
• Keith Sanford, MD PA
• Abby Keith, IONM
• Aimee L Keith, PSYD

• Gastroenterology Physician in San Antonio, TX
• Providers in San Antonio, TX by specialty
• Gastroenterology Physician in Texas

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