Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mary M Hillstrom, MD

Diagnostic Radiology Physician in Warwick, RI · enumerated 2005 · practices at Rhode Island Medical Imaging Inc.

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

National Provider Identifier

1245228105

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Registry record

Entity type Individual (Type 1)

Name Mary M Hillstrom

Credential MD

Sex Female

Practice address 125 Metro Center Blvd Ste 2000, Warwick, RI, 02886

Phone (401) 432-2520

Fax (401) 453-8220

Enumeration date Oct 13, 2005

Last updated in NPPES Mar 25, 2019

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 151888 (MA) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 8660 (RI) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License MD08660 (RI) Primary

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
008660	Other	-	TUFTS
003109817	Other	-	CT MED ASSISTANCE
007006235	Other	-	HOSPITAL PIN
008660	Other	-	BCBS
240081	Other	-	RIH PILGRIM
3200388	Other	-	HEALTHY START
3200388	Medicaid	MA	-
300084316	Other	-	RR MEDICARE
000000001988	Other	-	NHPRI
004950	Other	-	BLUE CHIP
7003975	Other	-	RI MEDICAL ASSISTANCE
8660	Other	-	FEP BLUE CROSS
1600203	Other	-	UNITED HEALTH PLANS
720071101	Other	-	CIGNA

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 Mary Hillstrom practice?

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

What is the NPI number for Mary Hillstrom?

The National Provider Identifier (NPI) for Mary Hillstrom is 1245228105, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-03-25.