Peter Williamson, LCSW
NPI 1245399567 · Mental Health Counselor · New York, NY
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Williamson, LCSW is a Mental Health Counselor provider in New York, NY (NPI 1245399567).
Provider details
- NPI number
- 1245399567
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- 0718501 (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
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
Mailing address
Registry dates
- Enumerated
- 2006-12-06
- Last updated
- 2024-04-05
- Certified
- 2024-04-04
Frequently asked questions
- What is Peter Williamson's NPI number?
- Peter Williamson's National Provider Identifier (NPI) is 1245399567, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Williamson's specialty?
- Peter Williamson is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Peter Williamson located?
- Peter Williamson's practice location on file with NPPES is 138 W 25th St Ste 802a7, New York, NY 10001-7405.
- What is Peter Williamson's phone number?
- The practice phone number listed in the NPPES registry for Peter Williamson is (646) 427-8746.
- Does Peter Williamson accept Medicare?
- Peter Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Williamson's NPI active?
- Yes — Peter Williamson's NPI (1245399567) is active in the NPPES registry as of the last update on 2024-04-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.