Mariaileen Sourwine, M.D.
Internal Medicine Physician · Arnold, MD
Mariaileen Sourwine, M.D. is an internal medicine physician with a practice address in Arnold, Maryland, and NPI 1528227378, issued on Jun 6, 2008. Check the license (Maryland D72591, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Mariaileen Sourwine
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- D72591 MD
Self-reported in NPPES; status is on the state search - Practice location
- 277 Peninsula Farm RD Ste I, Arnold, MD 21012
- Phone
- (410) 989-8833
- Enumerated
- Jun 6, 2008
- Record last updated
- Dec 7, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (410) 975-5641
- Medicare enrollment
- Enrolled (PECOS I20110921000397); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2008
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Also registered at 277 Peninsula Farm RD Ste I
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sara Adelman, CRNPAdult Health Nurse Practitioner1427142553
- Susan Moreland, DNP CRNPAdult Health Nurse Practitioner1427026046
Verify Mariaileen Sourwine in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D72591Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
12% more Medicare Part D claims than the average internal medicine physician in 2024
3,567 Medicare Part D claims for 292 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 55 claims were for opioids.
Most prescribed
- Atorvastatin Calcium254 claims
- Levothyroxine Sodium190 claims
- Losartan Potassium169 claims
- Rosuvastatin Calcium138 claims
- Metoprolol Succinate107 claims
- Hydrochlorothiazide89 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 one group practice
- Privia Care Center LLCFrederick, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mariaileen Sourwine among 3,904 internal medicine physician records in Maryland
Mariaileen Sourwine, M.D. is one of 3,904 internal medicine physician records with a practice address in Maryland. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 39% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2008 · median 2003 among the 2,445 with a school on file
- Record last updated2021 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
5 internal medicine physician records list a practice address in Arnold
They are 5 of the 307 NPPES records with a practice address in Arnold, and 3,904 internal medicine physician records in Maryland.
All 3,904 in Maryland → Every provider in Arnold → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Akber Ahmad, MDArnold, MD 210121578546941
- Sean Duffy, D.O.Arnold, MD 210121033371752
- Courtney Milne-Krohn, M.DArnold, MD 210121588823611
- Sadaf Rahman, MDArnold, MD 210121700414919
- Vijay Abhyankar, M.D.Bel Air, MD 210141225033806
- David Dunn, M.D.Bel Air, MD 210141700881315
- Philip Halstead, M.D.Bel Air, MD 210141962405704
- David McClure, M.D.Bel Air, MD 210141275538878
Common questions
What is Mariaileen Sourwine, M.D.'s NPI number?
Mariaileen Sourwine, M.D.'s National Provider Identifier (NPI) is 1528227378, issued on Jun 6, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mariaileen Sourwine, M.D. located?
The NPPES record lists a practice address at 277 Peninsula Farm RD Ste I, Arnold, MD, 21012. Phone: (410) 989-8833. Providers update this record themselves, so call before visiting.
How can I verify Mariaileen Sourwine, M.D.'s license?
NPPES lists Maryland license number D72591, 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 Mariaileen Sourwine, M.D. prescribe under Medicare Part D?
In 2024, Mariaileen Sourwine, M.D. had 3,567 Medicare Part D claims for 292 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.