Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Robert Barry Downes, MD

Addiction Medicine (Internal Medicine) Physician in Natick, MA · enumerated 2006 · practices at Downes Therpeutics LLC.

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

National Provider Identifier

1235165291

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Registry record

Entity type Individual (Type 1)

Name Dr. Robert Barry Downes

Credential MD

Sex Male

Practice address Natick, MA, 01760

Phone (508) 647-0100

Enumeration date Jun 23, 2006

Last updated in NPPES Dec 3, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RA0401X Addiction Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 32897 (MA) Primary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 32897 (MA) Secondary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Robert Downes practice?

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

What is the NPI number for Robert Downes?

The National Provider Identifier (NPI) for Robert Downes is 1235165291, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Downes Therpeutics LLC Medical Specialty Clinic/Center · Natick, MA NPI 1710379433

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-12-03.