Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

William L. Tonidandel, MD

Anesthesiology Physician in Helena, MT · enumerated 2006.

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

National Provider Identifier

1497771190

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Registry record

Entity type Individual (Type 1)

Name William L. Tonidandel

Credential MD

Sex Male

Practice address 2475 E Broadway St, Helena, MT, 59601

Phone (406) 442-2480

Enumeration date Jul 14, 2006

Last updated in NPPES Sep 27, 2007

Taxonomy & licenses

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians · License 10314 (MT) Primary

208VP0014X Interventional Pain Medicine Physician Allopathic & Osteopathic Physicians · License 10314 (MT) Secondary

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
0060826	Medicaid	MT	-

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 William Tonidandel's NPI record?

Cross-check NPI 1497771190 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1497771190 active?

Yes, as of the latest NPPES snapshot, NPI 1497771190 is active (record last updated 2007-09-27).

Other providers at this practice address

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Mark Kreisberg Hospitalist Physician · Helena, MT NPI 1467453324 Donald Skillman Infectious Disease Physician · Helena, MT NPI 1114915360 Bradley Dick Vascular & Interventional Radiology Physician · Helena, MT NPI 1609866540 Thomas Literski Pharmacist · Helena, MT NPI 1114909165 Yvonne Tapper-Gardzina Registered Dietitian · Helena, MT NPI 1871579151 Ashley Coggins Hospitalist Physician · Helena, MT NPI 1053385526 James Tarver Diagnostic Radiology Physician · Helena, MT NPI 1821062399 St. Peter'S Health General Acute Care Hospital · Helena, MT NPI 1528023520

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-09-27.