Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nicholas M Grumbach, M.D.

Internal Medicine Physician in Warwick, RI · enumerated 2005.

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

National Provider Identifier

1932105780

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Registry record

Entity type Individual (Type 1)

Name Nicholas M Grumbach

Credential M.D.

Sex Male

Practice address 400 Bald Hill Rd, Suite 520, Warwick, RI, 02886

Phone (401) 793-8520

Fax (401) 793-8527

Enumeration date Jun 27, 2005

Last updated in NPPES Sep 30, 2015

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD10410 (RI) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License MD10410 (RI) Secondary

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
2067650	Medicaid	MA	-
WG33264	Medicaid	RI	-

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 Nicholas Grumbach?

The National Provider Identifier (NPI) for Nicholas Grumbach is 1932105780, a Type 1 (individual) record in the CMS NPPES registry.

Where does Nicholas Grumbach practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-09-30.