NPPES file of Aug 9, 2026

Allison Kellogg, M.D.

Obstetrics & Gynecology Physician · San Antonio, TX

Allison Kellogg, M.D. is an obstetrics & gynecology physician with a practice address in San Antonio, Texas, and NPI 1225425440, issued on Apr 26, 2015. Check the license (Texas R9990, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1225425440
Name
Allison Kellogg
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
R9990 TX
201781 CA
Self-reported in NPPES; status is on the state search
Practice location
520 Madison Oak Dr, San Antonio, TX 78258
Phone
(210) 297-4075
Enumerated
Apr 26, 2015
Record last updated
May 6, 2025
Medicare enrollment
Enrolled (PECOS I20250723000759); accepts Medicare assignment
Medical or professional school
University Of Texas Medical School At San Antonio, 2015
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. 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 520 Madison Oak Dr

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

  1. Deborah Almarez, AU.D.Audiologist1073913703
  2. Sandra Aviles, MDPediatric Critical Care Medicine Physician1033182977
  3. Malissa Brown, APRN-CNPFamily Nurse Practitioner1023448115
  4. Russell Bryan, RNAcute Care Nurse Practitioner1316401326
  5. Pedro Chavez, MDPediatric Critical Care Medicine Physician1003870338
  6. Gracie CookseyAcute Care Nurse Practitioner1417892803

Verify Allison Kellogg in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license R9990    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

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Tahoe Forest Hospital DistrictTruckee, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Allison Kellogg among 3,524 obstetrics & gynecology physician records in Texas

Allison Kellogg, 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 2015, is newer than 78% of them.

  • NPI issued2015 · 78% of these records are older, 20% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 59% of these records are
  • Graduated2015 · median 2005 among the 2,093 with a school on file
  • Record last updated2025 · 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. Charles Bigler, M.D.San Antonio, TX 782581265466833
  4. Scott Farhart, M.D.San Antonio, TX 782581467470021
  5. Glen Feinstein, MDSan Antonio, TX 782581356322465
  6. Susan Novak, M.D.San Antonio, TX 782581720075021
  7. Lynn Parente, M.D.San Antonio, TX 782581003891110
  8. Christopher Serrano, MDSan Antonio, TX 782581740283886

Common questions

What is Allison Kellogg, M.D.'s NPI number?

Allison Kellogg, M.D.'s National Provider Identifier (NPI) is 1225425440, issued on Apr 26, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Allison Kellogg, M.D. located?

The NPPES record lists a practice address at 520 Madison Oak Dr, San Antonio, TX, 78258. Phone: (210) 297-4075. Providers update this record themselves, so call before visiting.

How can I verify Allison Kellogg, M.D.'s license?

NPPES lists Texas license number R9990, 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.

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.