Mark Riddle, M.D.
NPI 1316989304 · Child & Adolescent Psychiatry Physician · Columbia, MD
Mark Riddle, M.D. is a Child & Adolescent Psychiatry Physician provider in Columbia, MD (NPI 1316989304).
Provider details
- NPI number
- 1316989304
- Entity type
- Individual
- Primary specialty
- Child & Adolescent Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- D0045696 (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
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
- 2006-06-12
- Last updated
- 2022-07-21
Frequently asked questions
- What is Mark Riddle's NPI number?
- Mark Riddle's National Provider Identifier (NPI) is 1316989304, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Riddle's specialty?
- Mark Riddle is listed in the NPPES registry with a primary specialty of Child & Adolescent Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Riddle located?
- Mark Riddle's practice location on file with NPPES is 5500 Knoll North Dr Ste 370, Columbia, MD 21045-2393.
- What is Mark Riddle's phone number?
- The practice phone number listed in the NPPES registry for Mark Riddle is (410) 837-2050.
- Is Mark Riddle's NPI active?
- Yes — Mark Riddle's NPI (1316989304) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.