William Horwich, L.M.H.C.
NPI 1720227374 · Mental Health Counselor · Sleepy Hollow, NY
William Horwich, L.M.H.C. is a Mental Health Counselor provider in Sleepy Hollow, NY (NPI 1720227374).
Provider details
- NPI number
- 1720227374
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- L.M.H.C.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 003582 (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
17 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
- 2009-02-05
- Last updated
- 2022-07-21
Frequently asked questions
- What is William Horwich's NPI number?
- William Horwich's National Provider Identifier (NPI) is 1720227374, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Horwich's specialty?
- William Horwich is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is William Horwich located?
- William Horwich's practice location on file with NPPES is 239 N Broadway, Sleepy Hollow, NY 10591-2674.
- What is William Horwich's phone number?
- The practice phone number listed in the NPPES registry for William Horwich is (914) 631-2022.
- Is William Horwich's NPI active?
- Yes — William Horwich's NPI (1720227374) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.