John Karwowski, MD
Vascular Surgery Physician · Baltimore, MD
John Karwowski, MD is a vascular surgery physician with a practice address in Baltimore, Maryland, and NPI 1932123882, issued on Jul 26, 2006. Check the license on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John Karwowski
- Credential
- MD
- Primary taxonomy
- Vascular Surgery Physician 2086S0129X
- Practice location
- 22 S Greene St, Baltimore, MD 21201
- Phone
- (410) 328-5840
- Enumerated
- Jul 26, 2006
- Entity
- Type 1 · individual
Also registered at 22 S Greene St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bizhan Aarabi, MDNeurological Surgery Physician1174578876
- Elsadig Abdalla, MDStudent in an Organized Health Care Education/Training Program1073364477
- Ehssan AbdolalizadehStudent in an Organized Health Care Education/Training Program1093653271
- Mohammad Abdulelah, MDStudent in an Organized Health Care Education/Training Program1114650108
- Leenah AbdulgaderStudent in an Organized Health Care Education/Training Program1386323301
- Ifedayo Abiola-Matthew, CRNPFamily Nurse Practitioner1033781117
Verify John Karwowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of PhysiciansCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
92% fewer Medicare Part D claims than the average vascular surgery physician in 2024
17 Medicare Part D claims, against an average of 211 among the 3,020 providers of this specialty who prescribed in Part D.
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: $105.03
2 payments, mostly food and beverage; the largest payer was Boston Scientific Corporation. The 3,067 providers of this specialty with any payment received $6,147.33 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.
One hospital or facility affiliation
- University OF Maryland Surgical Associates PABaltimore, MD
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Vascular Surgery Physician providers in Maryland
There are 96 vascular surgery physician records in Maryland.
Other vascular surgery physician records in Maryland
- Ahmad Abu-Ghaida, M.D.Baltimore, MD1659320257
- Christopher Abularrage, MDBaltimore, MD1063675908
- Gi-Ann Acosta, MDCamp Springs, MD1104453471
- Lisa Alford, M.D.Bethesda, MD1497726079
- Mouhamad Annous, MDTowson, MD1154390953
- Margaret Arnold, M.D.Baltimore, MD1043439268
- Elliott Badder, MDBaltimore, MD1790750941
- Richard Bafford, MD, MSPHBel Air, MD1215056254
- James Black, M.D.Baltimore, MD1609832716
- Michael Bounds, M.D.Salisbury, MD1568755825
Common questions
What is John Karwowski, MD's NPI number?
John Karwowski, MD's National Provider Identifier (NPI) is 1932123882, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Karwowski, MD located?
The NPPES record lists a practice address at 22 S Greene St, Baltimore, MD, 21201. Phone: (410) 328-5840. Providers update this record themselves, so call before visiting.
How can I verify John Karwowski, MD's license?
Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Karwowski, MD prescribe under Medicare Part D?
In 2024, John Karwowski, MD had 17 Medicare Part D claims; the average among vascular surgery physician prescribers was 211. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.