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

Mr. Joseph Lewis Petroni Jr., MA, OTR/L

Occupational Therapist in Butte, MT · enumerated 2010.

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

National Provider Identifier

1235449240

Verified

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Registry record

Entity type Individual (Type 1)

Name Mr. Joseph Lewis Petroni Jr.

Credential MA, OTR/L

Sex Male

Practice address Butte, MT, 59701

Phone (406) 498-2350

Fax (406) 782-2082

Enumeration date Oct 13, 2010

Last updated in NPPES Sep 5, 2011

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

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Primary

225XL0004X Low Vision Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

224ZE0001X Environmental Modification Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XE1200X Ergonomics Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XF0002X Feeding, Eating & Swallowing Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XG0600X Gerontology Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XH1200X Hand Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XH1300X Human Factors Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XM0800X Mental Health Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XN1300X Neurorehabilitation Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XP0019X Physical Rehabilitation Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

225XP0200X Pediatric Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

224ZR0403X Driving and Community Mobility Occupational Therapy Assistant Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 881 (MT) Secondary

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 Joseph Petroni?

The National Provider Identifier (NPI) for Joseph Petroni is 1235449240, a Type 1 (individual) record in the CMS NPPES registry.

Where does Joseph Petroni practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-05.