Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Ann Renee Gregg Ross, OTR

Occupational Therapist in Missoula, MT · enumerated 2006.

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

National Provider Identifier

1861563199

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Registry record

Entity type Individual (Type 1)

Name Mrs. Ann Renee Gregg Ross

Credential OTR

Sex Female

Practice address 2842 Spurgin Rd, Missoula, MT, 59804

Phone (406) 327-7402

Fax (406) 327-7402

Enumeration date Nov 10, 2006

Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

225X00000X Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 33 (MT) Primary

Other identifiers

Identifier	Type	State	Issuer
0347786	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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1861563199 active?

Yes, as of the latest NPPES snapshot, NPI 1861563199 is active (record last updated 2007-07-09).

How do I verify Ann Gregg Ross's NPI record?

Cross-check NPI 1861563199 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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