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

Ronald P. Winfield, MD

Psychiatry Physician in North Chelmsford, MA · enumerated 2005.

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

National Provider Identifier

1679554927

Verified

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Registry record

Entity type Individual (Type 1)

Name Ronald P. Winfield

Credential MD

Sex Male

Practice address North Chelmsford, MA, 01863

Phone (978) 256-6579

Fax (978) 256-1943

Enumeration date Nov 11, 2005

Last updated in NPPES May 18, 2015

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

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 36859 (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
257473	Other	MA	MANAGED HEALTH NETWORK
M09264	Other	MA	BCBSMA
01Y001449MA01	Other	NH	ANTHEM BCBS
2029693	Medicaid	MA	-
036859	Other	MA	TUFTS
260042645	Other	MA	RAILROAD MEDICARE
0022320	Other	MA	BEACON HEALTH STRATEGIES
043476807-09	Other	MA	PACIFICARE
461243000	Other	MA	MAGELLAN

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.

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Frequently asked questions

Where does Ronald Winfield practice?

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

What is the NPI number for Ronald Winfield?

The National Provider Identifier (NPI) for Ronald Winfield is 1679554927, 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 2015-05-18.