Mark Thompson, M.D.
NPI 1821017484 · Obstetrics & Gynecology Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Thompson, M.D. is a Obstetrics & Gynecology Physician provider in San Antonio, TX (NPI 1821017484).
Provider details
- NPI number
- 1821017484
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- K6361 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
200 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 104 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $85 |
| Pelvic Exam99459 | 33 | $20 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 15 | $107 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 12 | $160 |
Typical Medicare-allowed amounts for these services range $20–$160 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 76 | 33 |
| Alendronate Sodium | 49 | 13 |
| Valacyclovir Hclbrand: Valacyclovir | 17 | — |
| Progesterone, Micronizedbrand: Progesterone | 14 | — |
| Tolterodine Tartratebrand: Tolterodine Tartrate Er | 13 | — |
| Estradiolbrand: Estrace | 12 | — |
| Fluconazole | 11 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$314 across 18 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-18
- Last updated
- 2020-07-14
- Certified
- 2020-07-14
Frequently asked questions
- What is Mark Thompson's NPI number?
- Mark Thompson's National Provider Identifier (NPI) is 1821017484, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Thompson's specialty?
- Mark Thompson is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Thompson located?
- Mark Thompson's practice location on file with NPPES is 502 Madison Oak Dr, San Antonio, TX 78258-4084.
- What is Mark Thompson's phone number?
- The practice phone number listed in the NPPES registry for Mark Thompson is (210) 495-1900.
- Does Mark Thompson accept Medicare?
- Mark Thompson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Thompson's NPI active?
- Yes — Mark Thompson's NPI (1821017484) is active in the NPPES registry as of the last update on 2020-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.