William Brian Karkowsky, M.D.
Critical Care Medicine (Internal Medicine) Physician · Baltimore, MD
William Brian Karkowsky, M.D. is a critical care medicine (internal medicine) physician with a practice address in Baltimore, Maryland, and NPI 1053675074, issued on Jun 25, 2012. Check the license (Maryland D0084609, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- William Brian Karkowsky
- Credential
- M.D.
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- D0084609 MD
Self-reported in NPPES; status is on the state search - Practice location
- 6503 Sanzo RD Apt F, Baltimore, MD 21209
- Phone
- (301) 787-9327
- Enumerated
- Jun 25, 2012
- Record last updated
- Jan 24, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181009003277); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 212 in Maryland → Look up another NPI →
Verify William Brian Karkowsky in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0084609Check 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 critical care medicine (internal medicine) physician in 2024
970 Medicare Part D claims for 162 beneficiaries, against an average of 696 among the 2,873 providers of this specialty who prescribed in Part D. Brand-name drugs were 62% of claims.
Most prescribed
- Trelegy Ellipta229 claims
- Montelukast Sodium105 claims
- Albuterol Sulfate Hfa81 claims
- Breo Ellipta55 claims
- Incruse Ellipta49 claims
- Prednisone48 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 2 group practices
- Greater Baltimore Medical Center IncBaltimore, MD
- Lifebridge Community Physicians IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Brian Karkowsky among 212 critical care medicine (internal medicine) physician records in Maryland
William Brian Karkowsky, M.D. is one of 212 critical care medicine (internal medicine) physician records with a practice address in Maryland. 86% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 66% of them.
- NPI issued2012 · 66% of these records are older, 29% newer
- In a Medicare fileYes · 86% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2012 · median 2005 among the 168 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Maryland
There are 212 critical care medicine (internal medicine) physician records in Maryland.
All 212 in Maryland → Every provider in Baltimore → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Eddy Fan, M.D.Baltimore, MD 212051881884518
- David Hager, M.D., PH.D.Baltimore, MD 212051407998867
- Todd Kolb, M.D., PH.D.Baltimore, MD 212051356495980
- Enid Neptune, M.D.Baltimore, MD 212051518051416
- Meredith Dixon, M.D.Towson, MD 212041295181865
- Christa Fistler, MDBaltimore, MD 212041770608887
- Suhali Kundu, MDTowson, MD 212041508362716
- Timothy Low, MDTowson, MD 212041497703862
Common questions
What is William Brian Karkowsky, M.D.'s NPI number?
William Brian Karkowsky, M.D.'s National Provider Identifier (NPI) is 1053675074, issued on Jun 25, 2012. An NPI identifies a provider in billing; it is not a license.
Where is William Brian Karkowsky, M.D. located?
The NPPES record lists a practice address at 6503 Sanzo RD Apt F, Baltimore, MD, 21209. Phone: (301) 787-9327. Providers update this record themselves, so call before visiting.
How can I verify William Brian Karkowsky, M.D.'s license?
NPPES lists Maryland license number D0084609, 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.
How much does William Brian Karkowsky, M.D. prescribe under Medicare Part D?
In 2024, William Brian Karkowsky, M.D. had 970 Medicare Part D claims for 162 beneficiaries; the average among critical care medicine (internal medicine) physician prescribers was 696. 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.