William A. Knack, PH.D.
Clinical Psychologist · Chappaqua, NY
William A. Knack, PH.D. is a clinical psychologist with a practice address in Chappaqua, New York, and NPI 1487856480, issued on Jun 1, 2007. Check the license (New York 7603, as entered in NPPES) with the New York board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- William A. Knack
- Credential
- PH.D.
- Primary taxonomy
- Clinical Psychologist 103TC0700X
- License number
- 7603 NY
Self-reported in NPPES; status is on the state search - Practice location
- 115 Bedford RD, Chappaqua, NY 10514
- Phone
- (914) 238-1433
- Enumerated
- Jun 1, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (914) 238-1433
- Entity
- Type 1 · individual
8 nearest clinical psychologist records → All 6,558 in New York → Look up another NPI →
Also registered at 115 Bedford RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Penny Knack, PH.D.Clinical Psychologist1215135314
Verify William A. Knack in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich New York board licenses this profession
Search for license 7603Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
William A. Knack among 6,558 clinical psychologist records in New York
William A. Knack, PH.D. is one of 6,558 clinical psychologist records with a practice address in New York. 7% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 25% of them.
- NPI issued2007 · 25% of these records are older, 57% newer
- In a Medicare fileNo · 7% of these records are
- In the CMS Doctors and Clinicians fileNo · 19% of these records are
- Record last updated2007 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103TC0700X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
12 clinical psychologist records list a practice address in Chappaqua
They are 12 of the 223 NPPES records with a practice address in Chappaqua, and 6,558 clinical psychologist records in New York. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 6,558 in New York → Every provider in Chappaqua → Clinical Psychologist nationwide →
The 8 clinical psychologist records with the nearest ZIP codes
- Sheri BaronChappaqua, NY 105141164842266
- Lewis Beckenstein, PH DChappaqua, NY 105141073616207
- Emily Bly, PHDChappaqua, NY 105141558659037
- Kaitlin CarsonChappaqua, NY 105141194469569
- Jesse ClarkChappaqua, NY 105141851286421
- Mark Finn, PHD06Chappaqua, NY 105141902973159
- Penny Knack, PH.D.Chappaqua, NY 105141215135314
- Elliott Seligman, PH.D.Chappaqua, NY 105141871383505
Common questions
What is William A. Knack, PH.D.'s NPI number?
William A. Knack, PH.D.'s National Provider Identifier (NPI) is 1487856480, issued on Jun 1, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William A. Knack, PH.D. located?
The NPPES record lists a practice address at 115 Bedford RD, Chappaqua, NY, 10514. Phone: (914) 238-1433. Providers update this record themselves, so call before visiting.
How can I verify William A. Knack, PH.D.'s license?
NPPES lists New York license number 7603, as entered by the provider. Search the New York board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.