Stewart B. Karr, MD
Diagnostic Radiology Physician · Silver Spring, MD
Stewart B. Karr, MD is a diagnostic radiology physician with a practice address in Silver Spring, Maryland, and NPI 1477567022, issued on Jul 28, 2006. Check the license (Maryland D0035868, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Stewart B. Karr
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- D0035868 MD
Self-reported in NPPES; status is on the state search - Practice location
- 2121 Medical Park Drive, Silver Spring, MD 20902
- Phone
- (501) 681-3003
- Enumerated
- Jul 28, 2006
- Record last updated
- May 7, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (301) 681-5868
- Medicaid ID
- 152651100 MD
- Medicare enrollment
- Enrolled (PECOS I20101116000583); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 877 in Maryland → Look up another NPI →
Also registered at 2121 Medical Park Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Wayne Hwang, MDDiagnostic Radiology Physician1104843887
- Arman Moshyedi, MDDiagnostic Radiology Physician1649284209
- Anil Narang, DODiagnostic Radiology Physician1710991377
- Sameer Pandit, M.D.Diagnostic Radiology Physician1003833781
- Robert Zimmermann, MDDiagnostic Radiology Physician1639196322
- Ryan Zucker, MDDiagnostic Radiology Physician1487676060
Verify Stewart B. Karr in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0035868Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $70.57
1 payment: food and beverage; the largest payer was Cook Medical LLC. The 8,048 providers of this specialty with any payment received $2,488.38 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 2 group practices
- Blackwell Physicians, LLCSilver Spring, MD
- Diagnostic Medical Imaging PASilver Spring, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stewart B. Karr among 877 diagnostic radiology physician records in Maryland
Stewart B. Karr, MD is one of 877 diagnostic radiology physician records with a practice address in Maryland. 72% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 50% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1986 · median 2003 among the 604 with a school on file
- Record last updated2008 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in Maryland
There are 877 diagnostic radiology physician records in Maryland.
All 877 in Maryland → Every provider in Silver Spring → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Tifani Gilliam, MDSilver Spring, MD 209021952320459
- Wayne Hwang, MDSilver Spring, MD 209021104843887
- Arman Moshyedi, MDSilver Spring, MD 209021649284209
- Anil Narang, DOSilver Spring, MD 209021710991377
- Sameer Pandit, M.D.Silver Spring, MD 209021003833781
- Benjamin Wisotsky, MDSilver Spring, MD 209021316181092
- Robert Zimmermann, MDSilver Spring, MD 209021639196322
- Ryan Zucker, MDSilver Spring, MD 209021487676060
Common questions
What is Stewart B. Karr, MD's NPI number?
Stewart B. Karr, MD's National Provider Identifier (NPI) is 1477567022, issued on Jul 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stewart B. Karr, MD located?
The NPPES record lists a practice address at 2121 Medical Park Drive, Silver Spring, MD, 20902. Phone: (501) 681-3003. Providers update this record themselves, so call before visiting.
How can I verify Stewart B. Karr, MD's license?
NPPES lists Maryland license number D0035868, as entered by the provider. 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.
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.