Ronald Sweren, M.D.
Dermatology Physician · Baltimore, MD
Ronald Sweren, M.D. is a dermatology physician with a practice address in Baltimore, Maryland, and NPI 1487689287, issued on Jul 11, 2006. Check the license (Maryland D20671, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Ronald Sweren
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- D20671 MD
Self-reported in NPPES; status is on the state search - Practice location
- 601 N Caroline St, Baltimore, MD 21287
- Phone
- (410) 955-5933
- Enumerated
- Jul 11, 2006
- Record last updated
- Feb 19, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicaid ID
- 799891100 MD
- Medicare enrollment
- Enrolled (PECOS I20100617000632); may accept Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 341 in Maryland → Look up another NPI →
Also registered at 601 N Caroline St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald Sweren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D20671Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3% more Medicare Part D claims than the average dermatology physician in 2024
824 Medicare Part D claims for 257 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Triamcinolone Acetonide60 claims
- Clobetasol Propionate49 claims
- Ketoconazole47 claims
- Fluocinonide37 claims
- Hydrocortisone37 claims
- Doxycycline Monohydrate35 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Johns Hopkins UniversityLutherville, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald Sweren among 341 dermatology physician records in Maryland
Ronald Sweren, M.D. is one of 341 dermatology physician records with a practice address in Maryland. 84% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 56% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1976 · median 2005 among the 241 with a school on file
- Record last updated2013 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in Maryland
There are 341 dermatology physician records in Maryland.
All 341 in Maryland → Every provider in Baltimore → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Anna Chien, MDBaltimore, MD 212871538286059
- Luis Garza, MD-PHDBaltimore, MD 212871427074517
- Sewon Kang, MDBaltimore, MD 212871972690816
- Noori Kim, M.D.Baltimore, MD 212871093036758
- Gerald Lazarus, M.D.Baltimore, MD 212871922042878
- Manisha Loss, M.D.Baltimore, MD 212871083832877
- Ciro Martins, M.D.Baltimore, MD 212871144264466
- Lloyd Miller, MDBaltimore, MD 212871952379513
Common questions
What is Ronald Sweren, M.D.'s NPI number?
Ronald Sweren, M.D.'s National Provider Identifier (NPI) is 1487689287, issued on Jul 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald Sweren, M.D. located?
The NPPES record lists a practice address at 601 N Caroline St, Baltimore, MD, 21287. Phone: (410) 955-5933. Providers update this record themselves, so call before visiting.
How can I verify Ronald Sweren, M.D.'s license?
NPPES lists Maryland license number D20671, 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 Ronald Sweren, M.D. prescribe under Medicare Part D?
In 2024, Ronald Sweren, M.D. had 824 Medicare Part D claims for 257 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Ronald Sweren, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.