Mark Ernest Thompson, M.D.
Obstetrics & Gynecology Physician · San Antonio, TX
Mark Ernest Thompson, M.D. is an obstetrics & gynecology physician with a practice address in San Antonio, Texas, and NPI 1821017484, issued on Jul 18, 2006. Check the license (Texas K6361, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mark Ernest Thompson
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- K6361 TX
Self-reported in NPPES; status is on the state search - Practice location
- 502 Madison Oak Dr, San Antonio, TX 78258
- Phone
- (210) 495-1900
- Enumerated
- Jul 18, 2006
- Record last updated
- Jul 14, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (210) 650-5975
- Medicaid IDs
- 045624601 TX
045624602 TX - Medicare enrollment
- Enrolled (PECOS I20090723000103); accepts Medicare assignment
- Medical or professional school
- University Of Texas Medical School At San Antonio, 1994
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 3,524 in Texas → Look up another NPI →
Also registered at 502 Madison Oak Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jane Atkerson, MDObstetrics & Gynecology Physician1023098100
- Jennifer Boyer, OTR/LOccupational Therapist1437499555
- Laura Brannen, MDObstetrics & Gynecology Physician1326452152
- Leslie Bucheit, M.S., CGCGenetic Counselor (M.S.)1225464845
- Kali Chatham, M.S.Genetic Counselor (M.S.)1780958298
- Caiqian Cropper, MS, CGCGenetic Counselor (M.S.)1104201110
Verify Mark Ernest Thompson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license K6361Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% more Medicare Part D claims than the average obstetrics & gynecology physician in 2024
298 Medicare Part D claims for 94 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Estradiol76 claims
- Alendronate Sodium49 claims
- Valacyclovir17 claims
- Progesterone14 claims
- Tolterodine Tartrate Er13 claims
- Estrace12 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.
Industry payments in 2024: $314.21
18 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Synergy Healthcare Associates, PLLCSpring Branch, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Ernest Thompson among 3,524 obstetrics & gynecology physician records in Texas
Mark Ernest Thompson, 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 fileYes · 59% of these records are
- Graduated1994 · median 2005 among the 2,093 with a school on file
- Record last updated2020 · 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
- Alka Arya-Degaetano, D.O.San Antonio, TX 782581295737450
- Jane Atkerson, MDSan Antonio, TX 782581023098100
- Charles Bigler, M.D.San Antonio, TX 782581265466833
- Scott Farhart, M.D.San Antonio, TX 782581467470021
- Glen Feinstein, MDSan Antonio, TX 782581356322465
- Susan Novak, M.D.San Antonio, TX 782581720075021
- Lynn Parente, M.D.San Antonio, TX 782581003891110
- Christopher Serrano, MDSan Antonio, TX 782581740283886
Common questions
What is Mark Ernest Thompson, M.D.'s NPI number?
Mark Ernest Thompson, M.D.'s National Provider Identifier (NPI) is 1821017484, issued on Jul 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Ernest Thompson, M.D. located?
The NPPES record lists a practice address at 502 Madison Oak Dr, San Antonio, TX, 78258. Phone: (210) 495-1900. Providers update this record themselves, so call before visiting.
How can I verify Mark Ernest Thompson, M.D.'s license?
NPPES lists Texas license number K6361, 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 Mark Ernest Thompson, M.D. prescribe under Medicare Part D?
In 2024, Mark Ernest Thompson, M.D. had 298 Medicare Part D claims for 94 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.
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.