Mark Dryden, M.D.
NPI 1275632341 · Diagnostic Radiology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Dryden, M.D. is a Diagnostic Radiology Physician provider in Houston, TX (NPI 1275632341).
Provider details
- NPI number
- 1275632341
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- L0143 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
833 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Screening Mammography77067 | 162 | $36 |
| Screening 3d Breast Mammography77063 | 157 | $28 |
| Diagnostic Digital Breast Tomosynthesis, Unilateral Or Bilateral (list Separately in Addition to 77065 Or 77066)G0279 | 132 | $28 |
| Diagnostic Mammography of Both Breasts77066 | 107 | $47 |
| Complete Ultrasound Scan of 1 Breast76641 | 98 | $42 |
| Ultrasound Scan of Chest76604 | 67 | $27 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-22
- Last updated
- 2010-03-02
Frequently asked questions
- What is Mark Dryden's NPI number?
- Mark Dryden's National Provider Identifier (NPI) is 1275632341, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Dryden's specialty?
- Mark Dryden is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Dryden located?
- Mark Dryden's practice location on file with NPPES is 1515 Holcombe Blvd, Houston, TX 77030-4009.
- What is Mark Dryden's phone number?
- The practice phone number listed in the NPPES registry for Mark Dryden is (713) 792-6161.
- Does Mark Dryden accept Medicare?
- Mark Dryden is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Dryden's NPI active?
- Yes — Mark Dryden's NPI (1275632341) is active in the NPPES registry as of the last update on 2010-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.