NPPES file of Aug 9, 2026

Robert William Hahn, M.D.

Obstetrics & Gynecology Physician · Doss, TX

Robert William Hahn, M.D. is an obstetrics & gynecology physician with a practice address in Doss, Texas, and NPI 1366767030, issued on Apr 6, 2010. Check the license (Texas E3937, 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
1366767030
Name
Robert William Hahn
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
E3937 TX
20601 CO
Self-reported in NPPES; status is on the state search
Practice location
983 Bee Cave Road, Doss, TX 78618
Phone
(830) 669-2099
Enumerated
Apr 6, 2010
Record last updated
Apr 6, 2010 (not updated in 16 years: call before relying on the address or phone)
Fax
(830) 669-2088
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 →

Verify Robert William Hahn in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license E3937    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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74% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

43 Medicare Part D claims, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.

  1. Robert Hahn43
  2. Specialty average165

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.

Robert William Hahn among 3,524 obstetrics & gynecology physician records in Texas

Robert William Hahn, 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 2010, is newer than 64% of them.

  • NPI issued2010 · 64% of these records are older, 33% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2010 · 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 → Obstetrics & Gynecology Physician nationwide →

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

  1. Charles Jaynes, M.D.Dripping Springs, TX 786201760544795
  2. Vinai Raksakulthai, M.D.Dripping Springs, TX 786201497035976
  3. Jonathan Buten, M.D.Cedar Park, TX 786131417054495
  4. Sabrina Collins, M.D.Cedar Park, TX 786131881761187
  5. Virginie Drummond, MDCedar Park, TX 786131437416369
  6. Jayme Evans, JAYME EVANSCedar Park, TX 786131508186495
  7. Christine Glass, MDCedar Park, TX 786131891299194
  8. Zachary Hamilton, MDCedar Park, TX 786131598185845

Common questions

What is Robert William Hahn, M.D.'s NPI number?

Robert William Hahn, M.D.'s National Provider Identifier (NPI) is 1366767030, issued on Apr 6, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Robert William Hahn, M.D. located?

The NPPES record lists a practice address at 983 Bee Cave Road, Doss, TX, 78618. Phone: (830) 669-2099. Providers update this record themselves, so call before visiting.

How can I verify Robert William Hahn, M.D.'s license?

NPPES lists Texas license number E3937, 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 Robert William Hahn, M.D. prescribe under Medicare Part D?

In 2024, Robert William Hahn, M.D. had 43 Medicare Part D claims; 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.