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CHARLES T GAY M.D.
NPI 1033189022
Pediatrics in San Antonio, TX

Active since January 24, 2006PECOS Enrolled
4499 MEDICAL DR, STE 396, SAN ANTONIO, TX 78229(210) 614-3737(210) 614-3147 Get Directions Write a Review

NPPES record last updated: September 26, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Charles T Gay M.d. NPPES

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

CHARLES T GAY M.D. (NPI 1033189022) is an individual pediatrics provider in San Antonio, Texas, licensed in Texas (G8126) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1033189022
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameCHARLES T GAYCredential: M.D.
Location Address4499 MEDICAL DR, STE 396San Antonio, TX 78229-3713
Mailing Address4499 Medical Dr, Ste 396San Antonio, TX 78229-3713 · (210) 614-3737 · Fax (210) 614-3147
Phone(210) 614-3737
Fax(210) 614-3147
Sole ProprietorNo
Enumeration DateJanuary 24, 2006
Last NPPES UpdateSeptember 26, 2011
✔ NPI 1033189022 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in TX · G8126
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
Also ListedPsychiatry & Neurology · Neurology with Special Qualifications in Child NeurologyTaxonomy 2084N0402X · License G8126 (TX)
4499 MEDICAL DR, San Antonio, TX 78229
Open in Google Maps ↗

Other Names 1

Professional Name (2)Charles T Gay M D P A

Other Identifiers 7

Medicaid129615407TX
Medicaid100825910AOK
Medicare PIN8F5428
Medicare PINTXB103620TX
Medicare PINOKA101761OK
Medicaid129615408TX
Other8AJ972TX · Bcbs Of Texas

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Baylor Scott and White Health Plan, Moda Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Charles T Gay M.d. 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.

Medicare Billing Reassignments

3

Medicare enrollment records show Charles Gay reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Baylor College Of Medicine
191 mi
Internal Medicine
6620 MAIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • 2,296 clinicians in this Medicare group
NPI 1104867175 (713) 798-2500
Texas Children's Physician Group
191 mi
Pediatrics
6621 FANNIN ST
Houston, TX 77030
  • Reassigned Medicare billing, Texas enrollment
  • Medicare enrollment name: Texas Childrens Physician Group
  • 2,498 clinicians in this Medicare group
NPI 1861675506 (832) 824-1000
Utmb Faculty Group Practice
229 mi
General Practice
301 UNIVERSITY BLVD
Galveston, TX 77555
  • Reassigned Medicare billing, Texas enrollment
  • 2,222 clinicians in this Medicare group
NPI 1942241146 (409) 772-2222

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

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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
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.

DR. ROBERT P THOMAS M.D.
Surgery (Pediatric Surgery)
4499 MEDICAL DR, SUITE 347
SAN ANTONIO, TX 78229
Bexar County (210) 615-8757
KRISTIE YOUNG BORGMAN MD
Pediatrics (Pediatric Cardiology)
4499 MEDICAL DR, #289
SAN ANTONIO, TX 78229
Bexar County (210) 614-3264
DR. FRANK M ROBERTSON M.D.
Surgery (Pediatric Surgery)
4499 MEDICAL DR, SUITE 347
SAN ANTONIO, TX 78229
Bexar County (210) 615-8757
DR. JAMES EDWARD FRANCO DDS, MD
Dentist (Oral and Maxillofacial Surgery)
4499 MEDICAL DR, SUITE 190
SAN ANTONIO, TX 78229
Bexar County (210) 614-3915
CECILIA ALEJANDRA GARCIA DE MITCHELL MD
Plastic Surgery
4499 MEDICAL DR, SUITE 347
SAN ANTONIO, TX 78229
Bexar County (210) 615-0068
DR. VINCENT AUGUST CALDAROLA M.D.
Specialist
4499 MEDICAL DR, SUITE 250
SAN ANTONIO, TX 78229
Bexar County (210) 614-3565
CHILDREN'S HEMATOLOGY & ONCOLOGY CENTER
Pediatrics (Pediatric Hematology-Oncology)
4499 MEDICAL DR, SUITE 260
SAN ANTONIO, TX 78229
Bexar County (210) 616-0800
OLIVIA A FUNES PA-C
Physician Assistant
4499 MEDICAL DR, SUITE 151A
SAN ANTONIO, TX 78229
Bexar County (210) 593-4392

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 Charles Gay's NPI number?

The NPI number for Charles Gay is 1033189022. It was assigned to this individual provider in the NPPES registry on January 24, 2006. The provider is also known as Charles T Gay M D P A.

Where is Charles Gay located?

Charles Gay practices at 4499 Medical Dr Ste 396, San Antonio, TX 78229. The listed phone number is (210) 614-3737.

What is Charles Gay's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Charles Gay enrolled in Medicare?

Yes. Charles Gay is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Charles Gay's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Gay reassigns Medicare benefits to 3 organizations: Baylor College Of Medicine (Houston, TX), Texas Children's Physician Group (Houston, TX) and Utmb Faculty Group Practice (Galveston, TX). Each 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 Charles Gay's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Gay accept?

Health plans from Baylor Scott and White Health Plan and Moda Health Plan, Inc. list Charles Gay 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 Charles Gay was last updated on September 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 years 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.