Katherine Mostkoff, LCSW
NPI 1487988879 · Clinical Social Worker · New York, NY
Katherine Mostkoff, LCSW is a Clinical Social Worker provider in New York, NY (NPI 1487988879).
Provider details
- NPI number
- 1487988879
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
- License
- R044744-1 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
16 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
- 2009-10-01
- Last updated
- 2013-04-18
Frequently asked questions
- What is Katherine Mostkoff's NPI number?
- Katherine Mostkoff's National Provider Identifier (NPI) is 1487988879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Mostkoff's specialty?
- Katherine Mostkoff is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Katherine Mostkoff located?
- Katherine Mostkoff's practice location on file with NPPES is 423 E 23rd St, New York, NY 10010-5011.
- What is Katherine Mostkoff's phone number?
- The practice phone number listed in the NPPES registry for Katherine Mostkoff is (212) 686-7500.
- Is Katherine Mostkoff's NPI active?
- Yes — Katherine Mostkoff's NPI (1487988879) is active in the NPPES registry as of the last update on 2013-04-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.