Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Frederick Y Chen, M.D., PH.D.
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Boston, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1649244898
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 2097630 | Medicaid | MA | - |
| 467726 | Other | MA | TAHP |
| 3707915 | Other | MA | CIGNA |
| J28299 | Other | MA | BCBS HMO/PPO/BC65 |
| 110040417A | Medicaid | MA | - |
| 5707717 | Other | MA | AETNA PPO |
| 0034349 | Other | MA | NHP |
| 18-00246 | Other | MA | UNITED |
| 3700736 | Other | MA | AETNA HMO |
| AA24183 | Other | MA | HPHC |
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
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-03.