Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
William D. Charmak, PHD
Clinical Psychologist in Nashua, NH · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1710078068
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name William D. Charmak
Credential PHD
Sex Male
Practice address 19 Tyler St Ste 103, Nashua, NH, 03060
Phone (603) 577-5375
Fax (603) 577-5609
Enumeration date Sep 28, 2006
Last updated in NPPES Apr 24, 2023
Taxonomy & licenses
103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 03296 (MD) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 03296 (MD) Secondary
103TC1900X Counseling Psychologist Behavioral Health & Social Service Providers · License 03296 (MD) Secondary
103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 1533 (NH) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers.
About the PHD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 152136 | Other | MD | VALUE OPTIONS |
| 5339652 | Other | MD | AETNA |
| 36140013 | Other | MD | CAREFIRST DC |
| 3162004 | Other | MD | UBH/ONE NET/MAMSI |
| 54622502 | Other | MD | CAREFIRST BCBS |
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is William Charmak?
William Charmak is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-04-24.