ANDREW MERTZ MD
NPI 1063948115
Internal Medicine - Gastroenterology in Fort Sam Houston, TX

Q: What is Andrew Mertz's NPI number?

The NPI number for Andrew Mertz is 1063948115. It was assigned to this individual provider in the NPPES registry on May 11, 2017.

Q: What is Andrew Mertz'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 Andrew Mertz was last updated on August 4, 2025. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since May 11, 2017PECOS Enrolled

3551 ROGER BROOKE DR, FORT SAM HOUSTON, TX 78234(210) 916-3647 Get Directions Write a Review

NPPES record last updated: August 4, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Aug 4, 2025, Apr 14, 2021, May 11, 2017 (3 updates tracked since 2017).

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About Andrew Mertz Md NPPES

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

ANDREW MERTZ MD (NPI 1063948115) is an individual gastroenterology provider in Fort Sam Houston, Texas, licensed in Virginia (0101266558) and active in the NPI registry since May 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1063948115

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameANDREW MERTZCredential: MD

Location Address3551 ROGER BROOKE DRFort Sam Houston, TX 78234-4504

Mailing Address8901 Rockville PikeBethesda, MD 20889-0001 · (301) 319-0451

Phone(210) 916-3647

Sole ProprietorNo

Enumeration DateMay 11, 2017

Last NPPES UpdateAugust 4, 20253 updates tracked since enumeration

NPPES CertifiedAugust 4, 2025

✔ NPI 1063948115 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 VA · 0101266558

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 0101266558 (VA)

3551 ROGER BROOKE DR, Fort Sam Houston, TX 78234

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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)

Andrew Mertz Md 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 78234 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.

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