Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Thomas J. Ruhnke Jr., M.D.

Diagnostic Radiology Physician in Richardson, TX · enumerated 2005 · practices at Methodist Hospitals of Dallas.

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

National Provider Identifier

1831199546

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas J. Ruhnke Jr.

Credential M.D.

Sex Male

Practice address 2831 E President George Bush Hwy, Richardson, TX, 75082

Phone (469) 204-5000

Fax (469) 204-5036

Enumeration date Jul 22, 2005

Last updated in NPPES Mar 19, 2020

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License H8366 (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
1248700-11	Medicaid	TX	-

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 is the NPI number for Thomas Ruhnke?

The National Provider Identifier (NPI) for Thomas Ruhnke is 1831199546, a Type 1 (individual) record in the CMS NPPES registry.

Where does Thomas Ruhnke practice?

The practice location on file with NPPES is in Richardson, TX. 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 2020-03-19.