Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Mrs. Catherine S Nagy, MD
Allergy Physician in Sacramento, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1477656817
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Registry record
Entity type Individual (Type 1)
Name Mrs. Catherine S Nagy
Credential MD
Sex Female
Practice address 4801 J St, Ste A, Sacramento, CA, 95819
Phone (916) 456-4782
Fax (916) 456-8277
Enumeration date Sep 7, 2006
Last updated in NPPES Dec 17, 2021
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 |
|---|---|---|---|
| 00A655320 | Medicaid | CA | - |
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
Is NPI 1477656817 active?
Yes, as of the latest NPPES snapshot, NPI 1477656817 is active (record last updated 2021-12-17).
How do I verify Catherine Nagy's NPI record?
Cross-check NPI 1477656817 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Paul Cloninger Clinical & Laboratory Immunology (Allergy & Immunology) Physician · Sacramento, CA NPI 1114903457 Stephen Nagy Allergy & Immunology (Internal Medicine) Physician · Sacramento, CA NPI 1013929967 Terry Pachter General Practice Dentistry · Sacramento, CA NPI 1578659686 Debra J. Tripp, Lmft Marriage & Family Therapist · Sacramento, CA NPI 1295054666 Solace Counseling Marriage and Family Therapy California P C Marriage & Family Therapist · Sacramento, CA NPI 1295040970 Jessica Maloh Naturopath · Sacramento, CA NPI 1497484836
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-17.