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

Heather Wark, MD

Internal Medicine 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

1063422749

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Registry record

Entity type Individual (Type 1)

Name Heather Wark

Credential MD

Sex Female

Practice address Northampton, MA, 01060

Phone (413) 586-3150

Fax (413) 774-7049

Enumeration date Aug 8, 2006

Last updated in NPPES Apr 9, 2021

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

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 76508 (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
3143384	Medicaid	MA	-
25338	Other	MA	BMC HEALTHNET
J16239	Other	MA	BC/BS MA

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Heather Wark?

Heather Wark is registered in NPPES with the primary taxonomy of Internal Medicine Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Winthrop Whitcomb Hospitalist Physician · Northampton, MA NPI 1558328898 Heather Wark MD LLC Internal Medicine Physician · Northampton, MA NPI 1871015750

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-09.