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William Knack, PH.D.
NPI 1487856480 · Clinical Psychologist · Chappaqua, NY
William Knack, PH.D. is a Clinical Psychologist provider in Chappaqua, NY (NPI 1487856480).
Provider details
- NPI number
- 1487856480
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 7603 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 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
115 Bedford Rd
Chappaqua, NY 10514-2721
Phone: (914) 238-1433
Fax: (914) 238-1433
Street-level locationGet directions
Mailing address
115 Bedford Rd
Chappaqua, NY 10514-2721
Registry dates
- Enumerated
- 2007-06-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Knack's NPI number?
- William Knack's National Provider Identifier (NPI) is 1487856480, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Knack's specialty?
- William Knack is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Knack located?
- William Knack's practice location on file with NPPES is 115 Bedford Rd, Chappaqua, NY 10514-2721.
- What is William Knack's phone number?
- The practice phone number listed in the NPPES registry for William Knack is (914) 238-1433.
- Is William Knack's NPI active?
- Yes — William Knack's NPI (1487856480) 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.