Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Peter D Leff, M.D.
Surgery Physician in Meriden, CT · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1669426508
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Registry record
Entity type Individual (Type 1)
Name Dr. Peter D Leff
Credential M.D.
Sex Male
Practice address 455 Lewis Ave, Suite 216, Meriden, CT, 06451
Phone (203) 634-0134
Fax (203) 630-3961
Enumeration date May 22, 2006
Last updated in NPPES Apr 1, 2010
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 010034825CT01 | Other | CT | BLUE CROSS/ BLUE SHIELD |
| P379134 | Other | CT | OXFORD |
| 1117925002 | Other | CT | CIGNA |
| 1348251 | Medicaid | CT | - |
| 1704267 | Other | CT | UNITED HEALTHCARE |
| 4653811 | Other | CT | AETNA |
| OR2835 | Other | CT | HEALTHNET |
| 034825 | Other | CT | CONNECTICARE |
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
How do I verify Peter Leff's NPI record?
Cross-check NPI 1669426508 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1669426508 active?
Yes, as of the latest NPPES snapshot, NPI 1669426508 is active (record last updated 2010-04-01).
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-04-01.