Dr Sean Patrick Duffy, DO - Medicare Internal Medicine in Arnold, MD

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Dr Sean Patrick Duffy, DO is a medicare enrolled "Internal Medicine" physician in Arnold, Maryland. His current practice location is 273 Peninsula Farm Rd Ste D, Arnold, Maryland. You can reach out to his office (for appointments etc.) via phone at (410) 699-9692.

Dr Sean Patrick Duffy is licensed to practice in Maryland (license number H0087213) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1033371752.

Contact Information

Dr Sean Patrick Duffy, DO
273 Peninsula Farm Rd Ste D,
Arnold, MD 21012-1012
(410) 699-9692
(443) 392-3332

Map and Direction




Physician's Profile

Full NameDr Sean Patrick Duffy
GenderMale
SpecialityInternal Medicine
Location273 Peninsula Farm Rd Ste D, Arnold, Maryland
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1033371752
  • Provider Enumeration Date: 06/25/2008
  • Last Update Date: 01/13/2026
  Medicare PECOS Information:
  • PECOS PAC ID: 2961624861
  • Enrollment ID: I20150318001591

Medical Identifiers

Medical identifiers for Dr Sean Patrick Duffy such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1033371752NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine H0087213 (Maryland)Primary
207R00000XInternal Medicine 0102204216 (Virginia)Secondary

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. Dr Sean Patrick Duffy allows following entities to bill medicare on his behalf.
Entity NamePrivia Medical Group Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013042480
PECOS PAC ID: 4385682061
Enrollment ID: O20050422000298
Entity NameAmerican Current Care Pa
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1003090879
PECOS PAC ID: 9739260019
Enrollment ID: O20110204000820

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Dr Sean Patrick Duffy is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Dr Sean Patrick Duffy, DO
273 Peninsula Farm Rd Ste D,
Arnold, MD 21012-1012

Ph: (410) 699-9692		Dr Sean Patrick Duffy, DO
273 Peninsula Farm Rd Ste D,
Arnold, MD 21012-1012

Ph: (410) 699-9692

Reviews and Comments


Internal Medicine Doctors in Arnold, MD

Dr. Charles J. Cattano, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1017 Stonington Dr, Arnold, MD 21012
Phone: 410-353-3374    Fax: 410-349-3447
Dr. Mariaileen Sourwine, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 277 Peninsula Farm Rd Ste I, Arnold, MD 21012
Phone: 410-989-8833    Fax: 410-975-5641
Dr. David Lloyd Greenburg, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 83 Church Rd, Arnold, MD 21012
Phone: 410-757-2778    Fax: 410-757-0632
Akber Ahmad, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1509 Ritchie Hwy, Arnold, MD 21012
Phone: 410-757-7600    Fax: 410-626-8043
Courtney Alexandra Milne-krohn, M.D
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 277 Peninsula Farm Rd Ste K&l, Arnold, MD 21012
Phone: 410-989-8833    Fax: 410-975-5641

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.