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Leonard Harrison, MD
NPI 1245361112 · Internal Medicine Physician · New York, NY
Leonard Harrison, MD is a Internal Medicine Physician provider in New York, NY (NPI 1245361112).
Provider details
- NPI number
- 1245361112
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 096018 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(89/100 index)
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
133 East 73rd Street
#101
New York, NY 10021
Phone: (212) 628-7772
Fax: (212) 628-0746
Street-level locationGet directions
Mailing address
133 East 73rd Street
New York, NY 10021
Registry dates
- Enumerated
- 2007-03-09
- Last updated
- 2007-07-08
Frequently asked questions
- What is Leonard Harrison's NPI number?
- Leonard Harrison's National Provider Identifier (NPI) is 1245361112, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leonard Harrison's specialty?
- Leonard Harrison is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Leonard Harrison located?
- Leonard Harrison's practice location on file with NPPES is 133 East 73rd Street, New York, NY 10021.
- What is Leonard Harrison's phone number?
- The practice phone number listed in the NPPES registry for Leonard Harrison is (212) 628-7772.
- Is Leonard Harrison's NPI active?
- Yes — Leonard Harrison's NPI (1245361112) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.