Harold Marks, MD
NPI 1285687558 · Pediatric Neurodevelopmental Disabilities Physician · Philadelphia, PA
Harold Marks, MD is a Pediatric Neurodevelopmental Disabilities Physician provider in Philadelphia, PA (NPI 1285687558).
Provider details
- NPI number
- 1285687558
- Entity type
- Individual
- Primary specialty
- Pediatric Neurodevelopmental Disabilities PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD020702E (PA)
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
20 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
- 2006-05-18
- Last updated
- 2007-07-31
Frequently asked questions
- What is Harold Marks's NPI number?
- Harold Marks's National Provider Identifier (NPI) is 1285687558, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Marks's specialty?
- Harold Marks is listed in the NPPES registry with a primary specialty of Pediatric Neurodevelopmental Disabilities Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Marks located?
- Harold Marks's practice location on file with NPPES is St Christopher'S Hospital Fo, Philadelphia, PA 19134-1095.
- What is Harold Marks's phone number?
- The practice phone number listed in the NPPES registry for Harold Marks is (215) 427-5464.
- Is Harold Marks's NPI active?
- Yes — Harold Marks's NPI (1285687558) is active in the NPPES registry as of the last update on 2007-07-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.