Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Joseph Patrick Riordan, RD

Registered Dietitian in Butte, MT · enumerated 2024.

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

National Provider Identifier

1518788363

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Joseph Patrick Riordan

Credential RD

Sex Male

Practice address 400 S Clark St, Butte, MT, 59701

Phone (406) 723-2528

Enumeration date Oct 23, 2024

Last updated in NPPES Jul 28, 2025

Taxonomy & licenses

133NN1002X Nutrition Education Nutritionist Dietary & Nutritional Service Providers Secondary

133V00000X Registered Dietitian Dietary & Nutritional Service Providers · License 86373326 Primary

RD · Registered Dietitian: A nutrition professional credentialed by the Commission on Dietetic Registration. About the RD credential

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

Where does Joseph Patrick Riordan practice?

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

What is the NPI number for Joseph Patrick Riordan?

The National Provider Identifier (NPI) for Joseph Patrick Riordan is 1518788363, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Cindy Simpkins Family Nurse Practitioner · Butte, MT NPI 1457357980 Eva Curry Family Nurse Practitioner · Butte, MT NPI 1255312575 Matthew Wild Certified Registered Nurse Anesthetist · Butte, MT NPI 1902882558 St James Healthcare General Acute Care Hospital · Butte, MT NPI 1528037215 Charles Watson Internal Medicine Physician · Butte, MT NPI 1124065792 Christopher Heard Athletic Trainer · Butte, MT NPI 1225071889 William Ellis Emergency Medicine Physician · Butte, MT NPI 1821025792 Debra Lewis Emergency Medicine Physician · Butte, MT NPI 1457388324

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-28.