Leslie Mark, MD
NPI 1356979546 · Psychiatry Physician · Middletown, NY
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Leslie Mark, MD is a Psychiatry Physician provider in Middletown, NY (NPI 1356979546).
Provider details
- NPI number
- 1356979546
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 328783 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 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 (2)
- 100 Madison AveMorristown, NJ 07960-6136Phone: (973) 971-5000
- 99 Beauvoir AveSummit, NJ 07901-3533Phone: (908) 522-2000
Registry dates
- Enumerated
- 2020-04-01
- Last updated
- 2025-06-18
- Certified
- 2025-06-18
Frequently asked questions
- What is Leslie Mark's NPI number?
- Leslie Mark's National Provider Identifier (NPI) is 1356979546, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Leslie Mark's specialty?
- Leslie Mark is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Leslie Mark located?
- Leslie Mark's practice location on file with NPPES is 707 E Main St, Middletown, NY 10940-2650.
- What is Leslie Mark's phone number?
- The practice phone number listed in the NPPES registry for Leslie Mark is (845) 333-7373.
- Does Leslie Mark accept Medicare?
- Leslie Mark is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Leslie Mark's NPI active?
- Yes — Leslie Mark's NPI (1356979546) is active in the NPPES registry as of the last update on 2025-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.