Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Winthrop F Whitcomb, MD

Hospitalist Physician in Northampton, MA · enumerated 2006 · practices at Heather Wark MD LLC.

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

National Provider Identifier

1558328898

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Registry record

Entity type Individual (Type 1)

Name Dr. Winthrop F Whitcomb

Credential MD

Sex Male

Practice address 548 Elm St, Northampton, MA, 01060

Phone (413) 794-8120

Enumeration date Apr 28, 2006

Last updated in NPPES Apr 15, 2016

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 73170 (MA) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 73170 (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
3114198	Medicaid	MA	-
003119171	Medicaid	CT	-
01914034	Medicaid	NY	-

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

How do I verify Winthrop Whitcomb's NPI record?

Cross-check NPI 1558328898 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1558328898 active?

Yes, as of the latest NPPES snapshot, NPI 1558328898 is active (record last updated 2016-04-15).

Other providers at this practice address

Browse all →

Heather Wark Internal Medicine Physician · Northampton, MA NPI 1063422749 Heather Wark MD LLC Internal Medicine Physician · Northampton, MA NPI 1871015750

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-15.