Joseph J. Sliwkowski, MD
Sports Medicine (Preventive Medicine) Physician · Marlborough, MA
Joseph J. Sliwkowski, MD is a sports medicine (preventive medicine) physician with a practice address in Marlborough, Massachusetts, and NPI 1861452294, issued on Mar 28, 2006. Check the license (Massachusetts 74311, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Joseph J. Sliwkowski
- Credential
- MD
- Primary taxonomy
- Sports Medicine (Preventive Medicine) Physician 2083S0010X
- License numbers
- 74311 MA
01051636A IN
Self-reported in NPPES; status is on the state search - Practice location
- 5 Mount Royal Ave, Marlborough, MA 01752
- Phone
- (508) 251-7262
- Enumerated
- Mar 28, 2006
- Record last updated
- Feb 28, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (508) 251-7265
- Medicaid ID
- 200264480 IN
- Entity
- Type 1 · individual
5 nearest sports medicine (preventive medicine) physician records → All 6 in Massachusetts → Look up another NPI →
Also registered at 5 Mount Royal Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Deborah Barbeau, MDOccupational Medicine Physician1750315818
Verify Joseph J. Sliwkowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 74311Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
21% fewer Medicare Part D claims than the average sports medicine (preventive medicine) physician in 2024
201 Medicare Part D claims for 139 beneficiaries, against an average of 255 among the 13 providers of this specialty who prescribed in Part D.
Most prescribed
- Amoxicillin-Clavulanate Potass22 claims
- Doxycycline Hyclate21 claims
- Prednisone20 claims
- Albuterol Sulfate Hfa16 claims
- Cephalexin12 claims
- Nitrofurantoin Mono-Macro11 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.
Sports Medicine (Preventive Medicine) Physician providers in Massachusetts
There are 6 sports medicine (preventive medicine) physician records in Massachusetts.
All 6 in Massachusetts → Every provider in Marlborough → Sports Medicine (Preventive Medicine) Physician nationwide →
The 5 sports medicine (preventive medicine) physician records with the nearest ZIP codes
- Cara ColeBillerica, MA 018211295319549
- Ingrid De Baintner, MDDover, MA 020301205037140
- Satoko Porter, MD RCEP CDENorwell, MA 020611275518730
- Arianna Diorio, MS, LAT, ATC, PESWellesley, MA 024821144904541
- Haliegh White, ATCTaunton, MA 027801942738356
Common questions
What is Joseph J. Sliwkowski, MD's NPI number?
Joseph J. Sliwkowski, MD's National Provider Identifier (NPI) is 1861452294, issued on Mar 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Joseph J. Sliwkowski, MD located?
The NPPES record lists a practice address at 5 Mount Royal Ave, Marlborough, MA, 01752. Phone: (508) 251-7262. Providers update this record themselves, so call before visiting.
How can I verify Joseph J. Sliwkowski, MD's license?
NPPES lists Massachusetts license number 74311, 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 Joseph J. Sliwkowski, MD prescribe under Medicare Part D?
In 2024, Joseph J. Sliwkowski, MD had 201 Medicare Part D claims for 139 beneficiaries; the average among sports medicine (preventive medicine) physician prescribers was 255. 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.