Heather Wark, MD
Internal Medicine Physician · Northampton, MA
Heather Wark, MD is an internal medicine physician with a practice address in Northampton, Massachusetts, and NPI 1063422749, issued on Aug 8, 2006. Check the license (Massachusetts 76508, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Heather Wark
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 76508 MA
Self-reported in NPPES; status is on the state search - Practice location
- 548 Elm St, Northampton, MA 01060
- Phone
- (413) 586-3150
- Enumerated
- Aug 8, 2006
- Record last updated
- Apr 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (413) 774-7049
- Medicaid ID
- 3143384 MA
- Medicare enrollment
- Enrolled (PECOS I20060330000261); accepts Medicare assignment
- Medical or professional school
- University Of Vermont College Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 548 Elm St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Winthrop Whitcomb, MDHospitalist Physician1558328898
Verify Heather Wark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 76508Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
36% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,019 Medicare Part D claims for 126 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims. 46 claims were for opioids.
Most prescribed
- Eliquis196 claims
- Atorvastatin Calcium79 claims
- Furosemide79 claims
- Metoprolol Tartrate62 claims
- Xarelto61 claims
- Amlodipine Besylate55 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Heather Wark MD LLCNorthampton, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Heather Wark among 6,825 internal medicine physician records in Massachusetts
Heather Wark, MD is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 12% of them.
- NPI issued2006 · 12% of these records are older, 54% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1991 · median 2004 among the 4,103 with a school on file
- Record last updated2021 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 internal medicine physician records list a practice address in Northampton
They are 21 of the 1,816 NPPES records with a practice address in Northampton, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Northampton → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- David Alpern, MDNorthampton, MA 010601568422608
- Elizabeth Armstrong, M.D.Northampton, MA 010601881626786
- Edward Dean, MDNorthampton, MA 010601376528638
- Tara Dumont, MDNorthampton, MA 010601467515163
- Peter Elsea, MDNorthampton, MA 010601699731182
- Andrew Hall, M.D.Northampton, MA 010601073593679
- Howard Klein, M.D.Northampton, MA 010601063456325
- Anne McKinnon, MDNorthampton, MA 010601255311452
Common questions
What is Heather Wark, MD's NPI number?
Heather Wark, MD's National Provider Identifier (NPI) is 1063422749, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Heather Wark, MD located?
The NPPES record lists a practice address at 548 Elm St, Northampton, MA, 01060. Phone: (413) 586-3150. Providers update this record themselves, so call before visiting.
How can I verify Heather Wark, MD's license?
NPPES lists Massachusetts license number 76508, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Heather Wark, MD prescribe under Medicare Part D?
In 2024, Heather Wark, MD had 2,019 Medicare Part D claims for 126 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.