Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ajay Kumar Upadhyay, MD
Surgery Physician in Oakland, CA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1104888155
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Registry record
Entity type Individual (Type 1)
Name Ajay Kumar Upadhyay
Credential MD
Sex Male
Practice address 365 Hawthorne Ave, Ste 101, Oakland, CA, 94609
Phone (510) 465-5523
Fax (510) 832-6061
Enumeration date Apr 5, 2006
Last updated in NPPES Feb 11, 2025
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 |
|---|---|---|---|
| GR0098240 | 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 this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Ajay Upadhyay?
Ajay Upadhyay is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Other providers at this practice address
Browse all → Rupert Horoupian Surgery Physician · Oakland, CA NPI 1184686156 Christine Lee Obstetrics & Gynecology Physician · Oakland, CA NPI 1265497770 Miranda Bassilios Physician Assistant · Oakland, CA NPI 1609831114 Goldee Gross Obstetrics & Gynecology Physician · Oakland, CA NPI 1235194176 William Isenberg Obstetrics & Gynecology Physician · Oakland, CA NPI 1265497101 Thomas Hambrick Obstetrics & Gynecology Physician · Oakland, CA NPI 1215992151 Hon Fong Gynecology Physician · Oakland, CA NPI 1033174974 Magdy Girgis Obstetrics & Gynecology Physician · Oakland, CA NPI 1710942677
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-11.