Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Thiruvoipati Nandakumar, M.D.

Internal Medicine Physician in Redding, CA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1598773632

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Thiruvoipati Nandakumar

Credential M.D.

Sex Male

Practice address Redding, CA, 96001

Phone (530) 241-1473

Fax (530) 245-4139

Enumeration date Aug 4, 2006

Last updated in NPPES Jun 12, 2023

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

174400000X Specialist Other Service Providers · License A61639 (CA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License A61639 (CA) Primary

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
110144857	Other	CA	RAILROAD MEDICARE NUMBER
A61639	Other	CA	MEDICAL LICENSE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Thiruvoipati Nandakumar?

Thiruvoipati Nandakumar is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-12.