Mark Harrison, MD
NPI 1134135098 · Gynecology Physician · North Potomac, MD
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Harrison, MD is a Gynecology Physician provider in North Potomac, MD (NPI 1134135098).
Provider details
- NPI number
- 1134135098
- Entity type
- Individual
- Primary specialty
- Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0064056 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2009-11-05
Frequently asked questions
- What is Mark Harrison's NPI number?
- Mark Harrison's National Provider Identifier (NPI) is 1134135098, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Harrison's specialty?
- Mark Harrison is listed in the NPPES registry with a primary specialty of Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Harrison located?
- Mark Harrison's practice location on file with NPPES is 13536 Travilah Rd, North Potomac, MD 20878-3847.
- What is Mark Harrison's phone number?
- The practice phone number listed in the NPPES registry for Mark Harrison is (301) 977-6784.
- Does Mark Harrison accept Medicare?
- Mark Harrison is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Harrison's NPI active?
- Yes — Mark Harrison's NPI (1134135098) is active in the NPPES registry as of the last update on 2009-11-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.