Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Alyssa Gillego, M.D.
Surgery Physician in Greenwich, CT · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1659567352
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Registry record
Entity type Individual (Type 1)
Name Alyssa Gillego
Credential M.D.
Sex Female
Practice address 77 Lafayette Pl Ste 302, Greenwich, CT, 06830
Phone (203) 863-4250
Fax (203) 863-4249
Enumeration date Sep 18, 2007
Last updated in NPPES Nov 13, 2017
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 |
|---|---|---|---|
| 390200000X | Medicaid | NY | - |
| 25207301 | Other | - | HEALTHFIRST |
| GA2073 | Other | - | ATLANTIS |
| 090923000071 | Other | - | FIDELIS |
| P4055272 | Other | - | OXFORD |
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 Alyssa Gillego's NPI record?
Cross-check NPI 1659567352 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1659567352 active?
Yes, as of the latest NPPES snapshot, NPI 1659567352 is active (record last updated 2017-11-13).
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-11-13.