Sean Patrick Duffy, D.O.
Internal Medicine Physician · Arnold, MD
Sean Patrick Duffy, D.O. is an internal medicine physician with a practice address in Arnold, Maryland, and NPI 1033371752, issued on Jun 25, 2008. Check the license (Maryland H0087213, as entered in NPPES) on the Maryland Board of Physicians; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Sean Patrick Duffy
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- H0087213 MD
0102204216 VA
Self-reported in NPPES; status is on the state search - Practice location
- 273 Peninsula Farm RD Ste D, Arnold, MD 21012
- Phone
- (410) 699-9692
- Enumerated
- Jun 25, 2008
- Record last updated
- Jan 13, 2026
- Fax
- (443) 392-3332
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 3,904 in Maryland → Look up another NPI →
Verify Sean Patrick Duffy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H0087213Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Sean Patrick Duffy among 3,904 internal medicine physician records in Maryland
Sean Patrick Duffy, D.O. 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 not. Its NPI, issued in 2008, is newer than 56% of them.
- NPI issued2008 · 56% of these records are older, 39% newer
- In a Medicare fileNo · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
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
- Courtney Milne-Krohn, M.DArnold, MD 210121588823611
- Sadaf Rahman, MDArnold, MD 210121700414919
- Mariaileen Sourwine, M.D.Arnold, MD 210121528227378
- 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 Sean Patrick Duffy, D.O.'s NPI number?
Sean Patrick Duffy, D.O.'s National Provider Identifier (NPI) is 1033371752, issued on Jun 25, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Sean Patrick Duffy, D.O. located?
The NPPES record lists a practice address at 273 Peninsula Farm RD Ste D, Arnold, MD, 21012. Phone: (410) 699-9692. Providers update this record themselves, so call before visiting.
How can I verify Sean Patrick Duffy, D.O.'s license?
NPPES lists Maryland license number H0087213, 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. 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.