Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Harshavardhan Tathireddy, M.D

Hematology & Oncology Physician in Portland, OR · enumerated 2009.

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

National Provider Identifier

1366670994

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Registry record

Entity type Individual (Type 1)

Name Harshavardhan Tathireddy

Credential M.D

Sex Male

Practice address 3181 Sw Sam Jackson Park Rd, L-579, Oc14ho , Dept of Hematology and Oncology, Portland, OR, 97239

Phone (503) 494-8311

Enumeration date Jun 22, 2009

Last updated in NPPES Oct 2, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD210372 (OR) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 125055801 (IL) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 036130674 (IL) Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License 036130674 (IL) 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
214881	Other	IL	MEDICARE GROUP PTAN

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.

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Frequently asked questions

How do I verify Harshavardhan Tathireddy's NPI record?

Cross-check NPI 1366670994 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1366670994 active?

Yes, as of the latest NPPES snapshot, NPI 1366670994 is active (record last updated 2024-10-02).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-02.