Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert P Kelleher, MD

Internal Medicine Physician in Watertown, MA · enumerated 2006.

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

National Provider Identifier

1891761714

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert P Kelleher

Credential MD

Sex Male

Practice address 521 Mount Auburn St, Ste 202, Watertown, MA, 02472

Phone (617) 926-9000

Fax (617) 926-7053

Enumeration date Feb 28, 2006

Last updated in NPPES Mar 9, 2010

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 227042 (MA) 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
2115620	Medicaid	MA	-
J40520	Other	MA	BLUE CROSS

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 Robert Kelleher?

The National Provider Identifier (NPI) for Robert Kelleher is 1891761714, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Kelleher practice?

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

Other providers at this practice address

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Andrew Cutler Internal Medicine Physician · Watertown, MA NPI 1437159720 Paul Fergus Internal Medicine Physician · Watertown, MA NPI 1356336200 Leon Bastajian Dentist · Watertown, MA NPI 1639155831 Leslie Macdonald Obstetrics & Gynecology Physician · Watertown, MA NPI 1376514562 Larry Weinrauch Cardiovascular Disease Physician · Watertown, MA NPI 1306858113 Joel Teeven Clinical Social Worker · Watertown, MA NPI 1073609095 Susan Lattanzi Physical Therapist · Watertown, MA NPI 1265522775 Cheryl Ehrenkranz Physical Therapist · Watertown, MA NPI 1114017514

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-03-09.