Mark Hryniewich, MD
Internal Medicine Physician · Leominster, MA
Mark Hryniewich, MD is an internal medicine physician with a practice address in Leominster, Massachusetts, and NPI 1255307781, issued on Feb 24, 2006. Check the license (Massachusetts 49755, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark Hryniewich
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 49755 MA
Self-reported in NPPES; status is on the state search - Practice location
- 225 New Lancaster RD, Leominster, MA 01453
- Phone
- (978) 466-3212
- Enumerated
- Feb 24, 2006
- Record last updated
- Dec 11, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (978) 534-3581
- Medicaid ID
- 110064803A MA
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 225 New Lancaster RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Ahearn, NPRegistered Nurse1598309932
- Maria Alatalo, PTPhysical Therapist1245219112
- Kathryn Allen, LICSWSocial Worker1427505916
- Shawna Baker, DNPFamily Nurse Practitioner1912627399
- Amy Chau, NPFamily Nurse Practitioner1235840356
- Pamela Demar, FNP-BCFamily Nurse Practitioner1124358916
Verify Mark Hryniewich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 49755Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
39% more Medicare Part D claims than the average internal medicine physician in 2024
4,427 Medicare Part D claims for 1,362 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 146 claims were for opioids.
Most prescribed
- Atorvastatin Calcium441 claims
- Lisinopril168 claims
- Amlodipine Besylate157 claims
- Omeprazole146 claims
- Losartan Potassium141 claims
- Levothyroxine Sodium113 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.
Mark Hryniewich among 6,825 internal medicine physician records in Massachusetts
Mark Hryniewich, 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 fileNo · 60% of these records are
- Record last updated2018 · 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).
35 internal medicine physician records list a practice address in Leominster
They are 35 of the 1,151 NPPES records with a practice address in Leominster, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Leominster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Glenn Allison, M.D.Leominster, MA 014531497745848
- Stephen Child, M.D.Leominster, MA 014531790747442
- Kimberly Ebb, MDLeominster, MA 014531790777589
- Ashraf Elkerm, MDLeominster, MA 014531306825831
- Myria Munoz, MDLeominster, MA 014531942261987
- Jyoti Nagarkar, MDLeominster, MA 014531013903210
- Binu Pathrose, MDLeominster, MA 014531023096682
- David Petullo, MDLeominster, MA 014531003890344
Common questions
What is Mark Hryniewich, MD's NPI number?
Mark Hryniewich, MD's National Provider Identifier (NPI) is 1255307781, issued on Feb 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Hryniewich, MD located?
The NPPES record lists a practice address at 225 New Lancaster RD, Leominster, MA, 01453. Phone: (978) 466-3212. Providers update this record themselves, so call before visiting.
How can I verify Mark Hryniewich, MD's license?
NPPES lists Massachusetts license number 49755, 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 Mark Hryniewich, MD prescribe under Medicare Part D?
In 2024, Mark Hryniewich, MD had 4,427 Medicare Part D claims for 1,362 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.