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Mark Somerstein, LCSW
NPI 1760536536 · Clinical Social Worker · New York, NY
Mark Somerstein, LCSW is a Clinical Social Worker provider in New York, NY (NPI 1760536536).
Provider details
- NPI number
- 1760536536
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 048345 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 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
150 E 84th St
2p
New York, NY 10028-2031
Phone: (212) 772-9465
Fax: (212) 348-4165
Street-level locationGet directions
Mailing address
150 East 84 Street
New York, NY 10028
Registry dates
- Enumerated
- 2007-01-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Somerstein's NPI number?
- Mark Somerstein's National Provider Identifier (NPI) is 1760536536, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Somerstein's specialty?
- Mark Somerstein is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Mark Somerstein located?
- Mark Somerstein's practice location on file with NPPES is 150 E 84th St, New York, NY 10028-2031.
- What is Mark Somerstein's phone number?
- The practice phone number listed in the NPPES registry for Mark Somerstein is (212) 772-9465.
- Is Mark Somerstein's NPI active?
- Yes — Mark Somerstein's NPI (1760536536) 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.