Mark Riddoch, MD
NPI 1437150661 · Internal Medicine Physician · San Antonio, TX
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Riddoch, MD is a Internal Medicine Physician provider in San Antonio, TX (NPI 1437150661).
Provider details
- NPI number
- 1437150661
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- H0759 (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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,144 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 | 412 | $121 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 345 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 230 | $124 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 62 | $14 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 21 | $51 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial Visit |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 145 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 503 | 108 |
| Rosuvastatin Calcium | 462 | 122 |
| Lisinopril | 420 | 111 |
| Atorvastatin Calcium | 375 | 103 |
| Amlodipine Besylate | 364 | 94 |
| Alprazolam | 275 | 56 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$146 across 6 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
Additional practice locations (1)
- 8401 Datapoint Dr Ste 40San Antonio, TX 78229-5900Phone: (210) 949-2225Fax: (210) 614-0866
Registry dates
- Enumerated
- 2005-08-10
- Last updated
- 2024-03-13
- Certified
- 2024-03-13
Frequently asked questions
- What is Mark Riddoch's NPI number?
- Mark Riddoch's National Provider Identifier (NPI) is 1437150661, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Riddoch's specialty?
- Mark Riddoch is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Riddoch located?
- Mark Riddoch's practice location on file with NPPES is 2829 Babcock Rd Ste 500, San Antonio, TX 78229-6028.
- What is Mark Riddoch's phone number?
- The practice phone number listed in the NPPES registry for Mark Riddoch is (210) 705-5600.
- Does Mark Riddoch accept Medicare?
- Mark Riddoch is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Riddoch's NPI active?
- Yes — Mark Riddoch's NPI (1437150661) is active in the NPPES registry as of the last update on 2024-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.