Mark Massak, D.O.
Vascular & Interventional Radiology Physician · Chambersburg, PA
Mark Massak, D.O. is a vascular & interventional radiology physician with a practice address in Chambersburg, Pennsylvania, and NPI 1952740532, issued on Jun 18, 2013. Check the license (Pennsylvania OS020464, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Mark Massak
- Credential
- D.O.
- Primary taxonomy
- Vascular & Interventional Radiology Physician 2085R0204X
- License number
- OS020464 PA
Self-reported in NPPES; status is on the state search - Practice location
- 12 St. Paul Drive, Chambersburg, PA 17201
- Phone
- (717) 217-6026
- Enumerated
- Jun 18, 2013
- Record last updated
- Feb 2, 2026
- Medicare enrollment
- Enrolled (PECOS I20200611000924); accepts Medicare assignment
- Medical or professional school
- Lake Erie College Of Osteopathic Medicine, Erie, 2013
- Entity
- Type 1 · individual
8 nearest vascular & interventional radiology physician records → All 244 in Pennsylvania → Look up another NPI →
Also registered at 12 St. Paul Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Melinda Accardi, PA-CMedical Physician Assistant1225217656
- Jose Galindo, MDEndocrinology, Diabetes & Metabolism Physician1518954403
Verify Mark Massak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license OS020464Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average vascular & interventional radiology physician in 2024
36 Medicare Part D claims for 11 beneficiaries, against an average of 75 among the 1,444 providers of this specialty who prescribed in Part D. Brand-name drugs were 56% of claims.
Most prescribed
- Eliquis12 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.
Industry payments in 2024: $4,109.52
41 payments; by number, the most common kind was food and beverage; the largest payer was Penumbra, Inc. The 3,457 providers of this specialty with any payment received $7,206.73 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Wellspan Medical GroupChambersburg, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Massak among 244 vascular & interventional radiology physician records in Pennsylvania
Mark Massak, D.O. is one of 244 vascular & interventional radiology physician records with a practice address in Pennsylvania. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 70% of them.
- NPI issued2013 · 70% of these records are older, 25% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 85% of these records are
- Graduated2013 · median 2007 among the 208 with a school on file
- Record last updated2026 · 43% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0204X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular & Interventional Radiology Physician providers in Pennsylvania
There are 244 vascular & interventional radiology physician records in Pennsylvania.
All 244 in Pennsylvania → Every provider in Chambersburg → Vascular & Interventional Radiology Physician nationwide →
The 8 vascular & interventional radiology physician records with the nearest ZIP codes
- John Lippert, M.D.Chambersburg, PA 172011336128404
- Jay GoodmanLewisberry, PA 173391326034026
- Anand Jagannath, MDLewisberry, PA 173391578559472
- Paul LicataLewisberry, PA 173391790772002
- Christoph Pohl, MDLewisberry, PA 173391134184427
- Jared Roberts, DOLewisberry, PA 173391124552245
- Alexander Trebelev, MDLewisberry, PA 173391104863489
- Jennifer Kissane, M.D.Lebanon, PA 170421164700225
Common questions
What is Mark Massak, D.O.'s NPI number?
Mark Massak, D.O.'s National Provider Identifier (NPI) is 1952740532, issued on Jun 18, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Mark Massak, D.O. located?
The NPPES record lists a practice address at 12 St. Paul Drive, Chambersburg, PA, 17201. Phone: (717) 217-6026. Providers update this record themselves, so call before visiting.
How can I verify Mark Massak, D.O.'s license?
NPPES lists Pennsylvania license number OS020464, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mark Massak, D.O. prescribe under Medicare Part D?
In 2024, Mark Massak, D.O. had 36 Medicare Part D claims for 11 beneficiaries; the average among vascular & interventional radiology physician prescribers was 75. 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.