Walter Merrigan, LCSW
NPI 1134234586 · Clinical Social Worker · Pound Ridge, NY
Walter Merrigan, LCSW is a Clinical Social Worker provider in Pound Ridge, NY (NPI 1134234586).
Provider details
- NPI number
- 1134234586
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- Yes
- License
- LCSW 19636R (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
- 2006-08-19
- Last updated
- 2007-07-08
Frequently asked questions
- What is Walter Merrigan's NPI number?
- Walter Merrigan's National Provider Identifier (NPI) is 1134234586, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Merrigan's specialty?
- Walter Merrigan is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Walter Merrigan located?
- Walter Merrigan's practice location on file with NPPES is 19 Tatomuck Rd, Pound Ridge, NY 10576-1431.
- What is Walter Merrigan's phone number?
- The practice phone number listed in the NPPES registry for Walter Merrigan is (914) 764-4920.
- Is Walter Merrigan's NPI active?
- Yes — Walter Merrigan's NPI (1134234586) 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.