Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor
Dr. Peter Elliot Yaffe, PH.D.
Cognitive & Behavioral Psychologist in Sudbury, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649242504
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Registry record
Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2011965 | Other | - | CIGNA HEALTH CARE |
| A001746 | Other | - | VALUE OPTIONS |
| W01977 | Other | - | BLUE SHIELD OF MASS |
| 095701 | Other | - | TRICARE |
| 5353041 | Other | - | AETNA |
| 0513911 | Medicaid | MA | - |
| 095701 | Other | - | MANAGED HEALTH NETWORK |
| 706892 | Other | MA | TUFTS HEALTH PLAN |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.