Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Thomas Arthur Hildreth, M.D.
Urology Physician in Napa, CA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417946096
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Registry record
Entity type Individual (Type 1)
Name Dr. Thomas Arthur Hildreth
Credential M.D.
Sex Male
Practice address 1100 Trancas St, Suite 213, Napa, CA, 94558
Phone (707) 224-7944
Fax (707) 224-5220
Enumeration date Oct 17, 2005
Last updated in NPPES Feb 9, 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 |
|---|---|---|---|
| 00C381170 | Medicaid | CA | - |
| 0315750001 | Other | - | DMERC |
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
What is the NPI number for Thomas Hildreth?
The National Provider Identifier (NPI) for Thomas Hildreth is 1417946096, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thomas Hildreth practice?
The practice location on file with NPPES is in Napa, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-02-09.