Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis A Tweedy, M.D.

Hematology & Oncology Physician in Austin, TX · enumerated 2006.

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

National Provider Identifier

1205874948

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis A Tweedy

Credential M.D.

Sex Male

Practice address 4101 James Casey St, Suite 250, Austin, TX, 78745

Phone (512) 419-9733

Fax (512) 440-1747

Enumeration date Jun 3, 2006

Last updated in NPPES May 10, 2018

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License H7840 (TX) 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
132779309	Medicaid	TX	-
8BP363	Other	TX	BCBS OF TX
P00691573	Other	TX	RAILROAD MEDICARE
132779302	Medicaid	TX	-
132779310	Medicaid	TX	-
0811853-01	Medicaid	TX	-
830004370	Other	TX	RAILROAD MEDICARE NUMBER

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

What is the NPI number for Dennis Tweedy?

The National Provider Identifier (NPI) for Dennis Tweedy is 1205874948, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dennis Tweedy practice?

The practice location on file with NPPES is in Austin, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

South Austin Ob-Gyn Obstetrics & Gynecology Physician · Austin, TX NPI 1013914993 Carsten Kampe Hematology & Oncology Physician · Austin, TX NPI 1912944521 Dina Tebcherany Medical Oncology Physician · Austin, TX NPI 1578501664 Pamela Garza Family Nurse Practitioner · Austin, TX NPI 1841232758 Joseph Myers Hematology & Oncology Physician · Austin, TX NPI 1992748818 Oncology Pharmacy Services, Inc Community/Retail Pharmacy · Austin, TX NPI 1861438749 Anthony R. Bittar, M.D, P.A. Otolaryngology Physician · Austin, TX NPI 1699701193 Anthony Bittar Otolaryngology Physician · Austin, TX NPI 1760411292

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-05-10.