NPPES file of Aug 9, 2026

Charles Robert Bigler, M.D.

Obstetrics & Gynecology Physician · San Antonio, TX

Charles Robert Bigler, M.D. is an obstetrics & gynecology physician with a practice address in San Antonio, Texas, and NPI 1265466833, issued on Jul 10, 2006. Check the license (Texas H4169, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1265466833
Name
Charles Robert Bigler
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License number
H4169 TX
Self-reported in NPPES; status is on the state search
Practice location
540 Oak Centre Dr Ste 280, San Antonio, TX 78258
Phone
(210) 614-2229
Enumerated
Jul 10, 2006
Record last updated
Jun 9, 2026
Fax
(210) 614-2232
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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8 nearest obstetrics & gynecology physician records → All 3,524 in Texas → Look up another NPI →

Also registered at 540 Oak Centre Dr Ste 280

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michelle Harden, MDObstetrics & Gynecology Physician1952400814

Verify Charles Robert Bigler in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license H4169    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

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54% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

76 Medicare Part D claims for 27 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.

  1. Charles Bigler76
  2. Specialty average165

Most prescribed

  1. Estradiol20 claims
  2. Estradiol (Twice Weekly)18 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Charles Robert Bigler among 3,524 obstetrics & gynecology physician records in Texas

Charles Robert Bigler, M.D. is one of 3,524 obstetrics & gynecology physician records with a practice address in Texas. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.

  • NPI issued2006 · 15% of these records are older, 53% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2026 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Physician providers in Texas

There are 3,524 obstetrics & gynecology physician records in Texas.

All 3,524 in Texas → Every provider in San Antonio → Obstetrics & Gynecology Physician nationwide →

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Alka Arya-Degaetano, D.O.San Antonio, TX 782581295737450
  2. Jane Atkerson, MDSan Antonio, TX 782581023098100
  3. Scott Farhart, M.D.San Antonio, TX 782581467470021
  4. Glen Feinstein, MDSan Antonio, TX 782581356322465
  5. Susan Novak, M.D.San Antonio, TX 782581720075021
  6. Lynn Parente, M.D.San Antonio, TX 782581003891110
  7. Christopher Serrano, MDSan Antonio, TX 782581740283886
  8. Vu Truong, MDSan Antonio, TX 782581134180961

Common questions

What is Charles Robert Bigler, M.D.'s NPI number?

Charles Robert Bigler, M.D.'s National Provider Identifier (NPI) is 1265466833, issued on Jul 10, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Charles Robert Bigler, M.D. located?

The NPPES record lists a practice address at 540 Oak Centre Dr Ste 280, San Antonio, TX, 78258. Phone: (210) 614-2229. Providers update this record themselves, so call before visiting.

How can I verify Charles Robert Bigler, M.D.'s license?

NPPES lists Texas license number H4169, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Charles Robert Bigler, M.D. prescribe under Medicare Part D?

In 2024, Charles Robert Bigler, M.D. had 76 Medicare Part D claims for 27 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.