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GONZALES HEALTHCARE SYSTEMS
NPI 1013916287
Clinic/Center - Rural Health in Gonzales, TX

Active since July 19, 2005CLIA 45D2177686 · Waiver
1110 N SARAH DEWITT DR, GONZALES, TX 78629(830) 672-7581(830) 672-2401 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jan 3, 2023, Oct 21, 2022, Sep 11, 2020 and 3 more (6 updates tracked since 2017).

About Gonzales Healthcare Systems NPPES

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

GONZALES HEALTHCARE SYSTEMS (NPI 1013916287), doing business as Sievers Medical Clinic, is a healthcare organization registered as a rural health in Gonzales, Texas and active in the NPI registry since July 2005. The organization holds a CLIA Waiver certificate valid through January 15, 2028, maintains 3 additional practice locations, and lists Brandon Anzaldua, Ceo Administrator, as its authorized official.

NPPES Registry Identity

NPI1013916287
Entity TypeOrganization
Primary Taxonomy261QR1300X
Legal Business NameGONZALES HEALTHCARE SYSTEMS
Location Address1110 N SARAH DEWITT DRGonzales, TX 78629-3311
Mailing AddressPo Box 587Gonzales, TX 78629-0587 · (830) 672-7581 · Fax (830) 672-2401
Phone(830) 672-7581
Fax(830) 672-2401
Organization SubpartYes
Authorized OfficialBrandon AnzalduaCeo Administrator · (830) 672-7581
Enumeration DateJuly 19, 2005
Last NPPES UpdateJuly 23, 20256 updates tracked since enumeration
NPPES CertifiedJuly 23, 2025
✔ NPI 1013916287 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyClinic/Center · Rural HealthAmbulatory Health Care Facilities
Taxonomy Code261QR1300X
Also ListedFamily MedicineTaxonomy 207Q00000X · License 000130 (TX)
Also ListedPediatricsTaxonomy 208000000X · License 000103 (TX)
1110 N SARAH DEWITT DR, Gonzales, TX 78629
Open in Google Maps ↗

Other Names 1

Doing Business AsSievers Medical Clinic

Secondary Practice Locations 3

Location 11300 Captain Albert Martin TrailGonzales, TX 78629 · Phone (830) 672-8502 · Fax (830) 672-3035
Location 2207 West 7th StreetShiner, TX 77984 · Phone (361) 239-5015 · Fax (361) 672-3035
Location 31605 N Sarah DeWitt DrGonzales, TX 78629-2700 · Phone (830) 672-7581

Other Identifiers 3

Medicaid130781102TX
Medicaid130781104TX
Medicaid130781103TX

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gonzales Healthcare Systems is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

57

Medicare enrollment records show 57 clinicians reassign Medicare billing to Gonzales Healthcare Systems, which bills Medicare for the services they deliver. Of these, 9 practice at this address and 12 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 11

Diagnostic Radiology27
Family Practice9
Nurse Practitioner7
Certified Registered Nurse Anesthetist (CRNA)4
General Surgery2
Obstetrics/Gynecology2
Orthopedic Surgery2
Internal Medicine1
3 other specialties3

Nearest to this location (20)

See all 57
Gloria Box, M.D.
Orthopedic Surgery
NPI 1386628246
1110 N. SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
Amanda Frederick, NP
Nurse Practitioner
NPI 1922839448
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOSSame address
Kalli Glass, DO
Family Practice
NPI 1124715321
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
Sean Hattenbach, M.D.
Family Practice
NPI 1225415359
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
David Meredith, D.O.
Family Practice
NPI 1427041383
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8500
✔ PECOS✔ Accepts MedicareSame address
Diana Mikulencak-Picha, NP-C
Nurse Practitioner
NPI 1790283596
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
John Thomas, M.D.
Family Practice
NPI 1881857498
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
Christopher Walker, M.D.
Family Practice
NPI 1326225822
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts MedicareSame address
Benjamin Wroblewski, MD
Family Practice
NPI 1386384402
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOSSame address
Terry Eska, M.D.
Internal Medicine
NPI 1558470864
1605 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-4995
✔ PECOS✔ Accepts Medicare0.4 mi
Commie Hisey, D.O.
Family Practice
NPI 1730181421
1308 SAINT LOUIS ST STE B
Gonzales, TX 78629
(830) 857-6884
✔ PECOS1.2 mi
Kathleen Koerner, D.O.
General Surgery
NPI 1093936171
1110 N SARAH DEWITT DR
Gonzales, TX 78629
(830) 672-8502
✔ PECOS✔ Accepts Medicare1.2 mi
Stormi Campbell, FNP- C
Nurse Practitioner
NPI 1760100713
1818 E US HIGHWAY 90
Waelder, TX 78959
(830) 788-7280
✔ PECOS✔ Accepts Medicare15 mi
Sue Hanner, FNP
Nurse Practitioner
NPI 1477892206
1818 E US HIGHWAY 90
Waelder, TX 78959
(830) 778-7280
✔ PECOS15 mi
Laura Adamek
Nurse Practitioner
NPI 1376952481
207 WEST 7TH STREET
Shiner, TX 77984
(361) 239-5015
✔ PECOS17 mi
Heather Domel
Nurse Practitioner
NPI 1295405371
207 W 7TH ST
Shiner, TX 77984
(361) 239-5015
✔ PECOS✔ Accepts Medicare17 mi
Celina Mccown, NP
Nurse Practitioner
NPI 1942967500
108 MEDICAL
Seguin, TX 78155
(830) 484-4200
✔ PECOS✔ Accepts Medicare31 mi
Alyson Kirchner, M.D.
Obstetrics/Gynecology
NPI 1295918266
1339 E COURT ST SUITE 210
Seguin, TX 78155
(830) 379-1500
✔ PECOS31 mi
Catherine Carpenter, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1255449286
1305 WONDER WORLD DR STE 105 YPS - CREDENTIALING
San Marcos, TX 78666
(512) 353-8161
✔ Accepts Medicare39 mi
Eric Miller, MD
Interventional Pain Management
NPI 1619974789
493 S SEGUIN AVE
New Braunfels, TX 78130
(830) 837-6650
✔ PECOS✔ Accepts Medicare43 mi
See all 57 clinicians

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

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 45D2177686

Gonzales Healthcare Systems Dba Sievers Medical Clinic-Shiner · Shiner, TX
Active · expires Jan 15, 2028
CLIA Number45D2177686
Laboratory TypeRural Health Clinic
Certificate Effective DateJanuary 16, 2026
Certificate Expiration DateJanuary 15, 2028
Laboratory DirectorChristopher Walker
Laboratory Phone(361) 239-5015
Laboratory LocationGonzales Healthcare Systems Dba Sievers Medical Clinic-Shiner207 West 7th Street, Shiner, TX 77984
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gonzales Healthcare Systems's NPI number?

The NPI number for Gonzales Healthcare Systems is 1013916287. It was assigned to this organization in the NPPES registry on July 19, 2005. The provider is doing business as Sievers Medical Clinic.

Where is Gonzales Healthcare Systems located?

Gonzales Healthcare Systems is located at 1110 N Sarah Dewitt Dr, Gonzales, TX 78629. The listed phone number is (830) 672-7581.

What is Gonzales Healthcare Systems's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Rural Health, with taxonomy code 261QR1300X.

Is Gonzales Healthcare Systems enrolled in Medicare?

Yes. Gonzales Healthcare Systems is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gonzales Healthcare Systems?

According to the CMS Revalidation Reassignment List (October 2026 release), 57 clinicians in 11 Medicare specialties reassign their Medicare billing to Gonzales Healthcare Systems. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Diagnostic Radiology (27), Family Practice (9) and Nurse Practitioner (7). Of these, 9 practice at this address and 12 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gonzales Healthcare Systems hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 45D2177686) is associated with this NPI, valid through January 15, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Gonzales Healthcare Systems accept?

Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 1 other insurer list Gonzales Healthcare Systems as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gonzales Healthcare Systems was last updated on July 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.