Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Robert Charles Sumner, MD

Cardiovascular Disease Physician in Marlborough, MA · enumerated 2007 · practices at Middlesex Internal Medicine Associates, Inc..

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

National Provider Identifier

1619000114

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Charles Sumner

Credential MD

Sex Male

Practice address 28 Lord Rd, Suite 255, Marlborough, MA, 01752

Phone (508) 485-7660

Fax (508) 481-4540

Enumeration date Mar 13, 2007

Last updated in NPPES Jun 22, 2012

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 032745 (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
6173411	Medicaid	MA	-
04-3035909	Other	-	MIMA GROUP TAX ID
C05036	Other	MA	BLUE CROSS BLUE SHIELD
2000000232	Other	MA	HARVARD PILGRIM HEALTH
600427	Other	MA	TUFTS HEALTH PLAN

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 Sumner?

The National Provider Identifier (NPI) for Robert Sumner is 1619000114, a Type 1 (individual) record in the CMS NPPES registry.

Where does Robert Sumner practice?

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

Other providers at this practice address

Browse all →

Middlesex Internal Medicine Associates, Inc. Cardiovascular Disease Physician · Marlborough, MA NPI 1265601033 Deborah Daniels Adult Health Nurse Practitioner · Marlboro, MA NPI 1609012517

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-06-22.