Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. WILLIAM ALBERT KETTERER DO
NPI 1518615111
Hospitalist in San Antonio, TX

Q: What is William Ketterer's NPI number?

The NPI number for William Ketterer is 1518615111. It was assigned to this individual provider in the NPPES registry on March 13, 2022.

Q: What is William Ketterer's specialty?

The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.

Q: When was this NPI record last updated?

The NPPES record for William Ketterer was last updated on July 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 13, 2022PECOS Enrolled

4502 MEDICAL DR, SAN ANTONIO, TX 78229(210) 358-4000 Get Directions Write a Review

NPPES record last updated: July 20, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 20, 2026, Jul 1, 2025, Dec 6, 2024 and 1 more (4 updates tracked since 2022).

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About Dr. William Albert Ketterer Do NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM ALBERT KETTERER DO (NPI 1518615111) is an individual hospitalist provider in San Antonio, Texas, licensed in Texas (W4736) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1518615111

Entity TypeIndividualMale

Primary Taxonomy208M00000X

Provider Legal NameDR. WILLIAM ALBERT KETTERERCredential: DO

Location Address4502 MEDICAL DRSan Antonio, TX 78229-4402

Mailing Address3007 Nantucket DrSan Antonio, TX 78230-3425

Phone(210) 358-4000

Sole ProprietorNo

Enumeration DateMarch 13, 2022

Last NPPES UpdateJuly 20, 20264 updates tracked since enumeration

NPPES CertifiedJuly 20, 2026

✔ NPI 1518615111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyHospitalistAllopathic & Osteopathic Physicians

Taxonomy Code208M00000X

License✔ Licensed in TX · W4736

Definition

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Also ListedInternal MedicineTaxonomy 207R00000X · License W4736 (TX), 0102208859 (VA)

Also ListedGeneral PracticeTaxonomy 208D00000X · License 0102208859 (VA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

4502 MEDICAL DR, San Antonio, TX 78229

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Albert Ketterer Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78229 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$126.40 typical visit price

range $54.84 – $166.88

Typical copayment $31.60 (range $13.71 – $41.72)

Most-billed visit code 99204

Established Patient

$97.05 typical visit price

range $17.52 – $136.11

Typical copayment $24.26 (range $4.38 – $34.02)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EDUARDO N. POLLONO MD

Internal Medicine (Cardiovascular Disease)