Dagmara Osmanska-Jac, M.D
Internal Medicine Physician · Chelmsford, MA
Dagmara Osmanska-Jac, M.D is an internal medicine physician with a practice address in Chelmsford, Massachusetts, and NPI 1053413138, issued on Sep 1, 2006. Check the license (Massachusetts 238055, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Dagmara Osmanska-Jac
- Credential
- M.D
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- 238055 MA
K1892 TX
Self-reported in NPPES; status is on the state search - Practice location
- 290 Littleton RD Unit 3, Chelmsford, MA 01824
- Phone
- (978) 685-2460
- Enumerated
- Sep 1, 2006
- Record last updated
- May 28, 2025
- Medicaid ID
- 110081539A MA
- Medicare enrollment
- Enrolled (PECOS I20231222001692); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 290 Littleton RD Unit 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leanne Aguirre, NPFamily Nurse Practitioner1720741465
- Rachelle Archard, CNPAdult Health Nurse Practitioner1598400079
- Laura BauerNurse Practitioner1164078838
- Diana Bishop, NPNurse Practitioner1447954177
- Amanda Bonomo, FNP-BCFamily Nurse Practitioner1912623588
- Elnora Burton, ARNPFamily Nurse Practitioner1659694768
Verify Dagmara Osmanska-Jac in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 238055Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
38% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,967 Medicare Part D claims for 444 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 144 claims were for opioids.
Most prescribed
- Pantoprazole Sodium103 claims
- Atorvastatin Calcium92 claims
- Oxycodone Hcl88 claims
- Gabapentin81 claims
- Metoprolol Succinate58 claims
- Amlodipine Besylate50 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
- New England Community Medical Services PLLCSalem, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Dagmara Osmanska-Jac among 6,825 internal medicine physician records in Massachusetts
Dagmara Osmanska-Jac, M.D 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
- Graduated1990 · median 2004 among the 4,103 with a school on file
- Record last updated2025 · 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).
34 internal medicine physician records list a practice address in Chelmsford
They are 34 of the 937 NPPES records with a practice address in Chelmsford, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Chelmsford → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Shamim Dahod, M.D.Chelmsford, MA 018241710971379
- Karen Dasilva, M.D.Chelmsford, MA 018241851364889
- Richard Deamicis, M.D.Chelmsford, MA 018241801865233
- Milton Drake, M.D.Chelmsford, MA 018241750354700
- Damian FolchChelmsford, MA 018241225002066
- Jorge Gonzalez, M.D.Chelmsford, MA 018241821081209
- Raj Gupta, M.D.Chelmsford, MA 018241346215605
- Wen Yee Lee, M.D.Chelmsford, MA 018241396701777
Common questions
What is Dagmara Osmanska-Jac, M.D's NPI number?
Dagmara Osmanska-Jac, M.D's National Provider Identifier (NPI) is 1053413138, issued on Sep 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Dagmara Osmanska-Jac, M.D located?
The NPPES record lists a practice address at 290 Littleton RD Unit 3, Chelmsford, MA, 01824. Phone: (978) 685-2460. Providers update this record themselves, so call before visiting.
How can I verify Dagmara Osmanska-Jac, M.D's license?
NPPES lists Massachusetts license number 238055, 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 Dagmara Osmanska-Jac, M.D prescribe under Medicare Part D?
In 2024, Dagmara Osmanska-Jac, M.D had 1,967 Medicare Part D claims for 444 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.