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

Dr. Thomas Stuart Walker, MD

Internal Medicine Physician in Black River Falls, WI · enumerated 2006.

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

National Provider Identifier

1235224148

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Registry record

Entity type Individual (Type 1)

Name Dr. Thomas Stuart Walker

Credential MD

Sex Male

Practice address Black River Falls, WI, 54615

Phone (715) 284-9851

Fax (715) 284-5150

Enumeration date Oct 4, 2006

Last updated in NPPES Feb 1, 2022

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 38196 (WI) 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
110190312	Other	WI	PALMETTO GBA
32437200	Medicaid	WI	-
53592	Other	WI	SECURITY HEALTH PLAN

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 Thomas Walker's NPI record?

Cross-check NPI 1235224148 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1235224148 active?

Yes, as of the latest NPPES snapshot, NPI 1235224148 is active (record last updated 2022-02-01).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-01.