SYLVIA EMMA KEISER DO
NPI 1366063463
Internal Medicine - Gastroenterology in San Antonio, TX

Q: What is Sylvia Keiser's NPI number?

The NPI number for Sylvia Keiser is 1366063463. It was assigned to this individual provider in the NPPES registry on April 29, 2020.

Q: What is Sylvia Keiser's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Sylvia Keiser was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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 April 29, 2020PECOS Enrolled

8435 WURZBACH RD, SAN ANTONIO, TX 78229(210) 450-9800 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Sylvia Emma Keiser Do NPPES

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

SYLVIA EMMA KEISER DO (NPI 1366063463) is an individual gastroenterology provider in San Antonio, Texas, licensed in Texas (W6278) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with University Health System, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1366063463

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameSYLVIA EMMA KEISERCredential: DO

Location Address8435 WURZBACH RDSan Antonio, TX 78229-3921

Mailing Address8435 Wurzbach RdSan Antonio, TX 78229-3921 · (210) 450-9800

Phone(210) 450-9800

Sole ProprietorNo

Medical School CMSOtherGraduated 2020

Enumeration DateApril 29, 2020

Last NPPES UpdateJune 24, 2026

NPPES CertifiedJune 24, 2026

✔ NPI 1366063463 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in TX · W6278

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X · License W6278 (TX)

8435 WURZBACH RD, San Antonio, TX 78229

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Community First.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Sylvia Emma Keiser Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4385115740

PECOS Enrollment IDI20260605002841

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.

Medicare Billing Reassignment

Medicare enrollment records show Sylvia Keiser reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

The University Of Texas Health Science Center At San Antonio

0.3 mi

General Acute Care Hospital

8311 EWING HALSELL DR
San Antonio, TX 78229

Reassigned Medicare billing, Texas enrollment
2,397 clinicians in this Medicare group

NPI 1326829904 (210) 562-8000

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Health System

Acute Care Hospitals · San Antonio, TX

3/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number450213

Location4502 Medical DrSan Antonio, TX 78229 · Bexar County

Emergency services Birthing friendly

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 19

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

DR. PRADEEP YARRA MD

Internal Medicine (Gastroenterology)