Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Infectious Disease Specialists, PC

Infectious Disease Physician in Missoula, MT · enumerated 2006 · authorized official Willa Craig, Business Manager.

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

National Provider Identifier

1144260514

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Registry record

Entity type Organization (Type 2)

Legal business name Infectious Disease Specialists, PC

Practice address 614 W Spruce St, Missoula, MT, 59802

Phone (406) 327-1666

Fax (406) 329-5606

Enumeration date Jun 7, 2006

Last updated in NPPES May 27, 2008

Taxonomy & classification

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 6638 (MT) Primary

Authorized official

Name Willa Craig

Title Business Manager

Phone (406) 721-6221

Other identifiers

Identifier	Type	State	Issuer
0154581	Medicaid	MT	-
P00185637	Other	-	RR MEDICARE
1073553491	Medicaid	MT	-
92275	Other	-	BCBS

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Infectious Disease Specialists, PC?

Infectious Disease Specialists, PC is registered in NPPES as a Infectious Disease Physician (its primary provider taxonomy).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-05-27.