Clark Johnson, MD
NPI 1497989305 · Maternal & Fetal Medicine Physician · Harrisburg, PA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clark Johnson, MD is a Maternal & Fetal Medicine Physician provider in Harrisburg, PA (NPI 1497989305).
Provider details
- NPI number
- 1497989305
- Entity type
- Individual
- Primary specialty
- Maternal & Fetal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- D76370 (MD)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 600 N Wolfe Street Phipps 279Baltimore, MD 21287-0001Phone: (410) 955-6710
Registry dates
- Enumerated
- 2009-05-06
- Last updated
- 2025-07-07
- Certified
- 2025-07-07
Frequently asked questions
- What is Clark Johnson's NPI number?
- Clark Johnson's National Provider Identifier (NPI) is 1497989305, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clark Johnson's specialty?
- Clark Johnson is listed in the NPPES registry with a primary specialty of Maternal & Fetal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Clark Johnson located?
- Clark Johnson's practice location on file with NPPES is 100 S 2nd St Ste 4b, Harrisburg, PA 17101-2546.
- What is Clark Johnson's phone number?
- The practice phone number listed in the NPPES registry for Clark Johnson is (717) 231-8472.
- Does Clark Johnson accept Medicare?
- Clark Johnson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clark Johnson's NPI active?
- Yes — Clark Johnson's NPI (1497989305) is active in the NPPES registry as of the last update on 2025-07-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.