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DR. SEAN PATRICK DUFFY D.O.
NPI 1033371752
Internal Medicine in Arnold, MD

Active since June 25, 2008Opted out of Medicare · through Apr 1, 2028
273 PENINSULA FARM RD STE D, ARNOLD, MD 21012(410) 699-9692(443) 392-3332 Get Directions Write a Review

NPPES record last updated: January 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Sean Patrick Duffy D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SEAN PATRICK DUFFY D.O. (NPI 1033371752) is an individual internal medicine provider in Arnold, Maryland, licensed in Maryland (H0087213) and active in the NPI registry since June 2008. He has opted out of Medicare through April 1, 2028 and remains eligible to order and refer.

NPPES Registry Identity

NPI1033371752
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. SEAN PATRICK DUFFYCredential: D.O.
Location Address273 PENINSULA FARM RD STE DArnold, MD 21012-1012
Mailing Address273 Peninsula Farm Rd Ste DArnold, MD 21012-1012 · (410) 699-9692 · Fax (443) 392-3332
Phone(410) 699-9692
Fax(443) 392-3332
Sole ProprietorYes
Enumeration DateJune 25, 2008
Last NPPES UpdateJanuary 13, 2026
NPPES CertifiedJanuary 13, 2026
✔ NPI 1033371752 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in MD · H0087213✔ Licensed in VA · 0102204216
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
273 PENINSULA FARM RD STE D, Arnold, MD 21012
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, Oscar Health Insurance, Oscar Health Maintenance Organization of Florida and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

ⓘ

Opted out of Medicare

Dr. Sean Patrick Duffy D.o. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from April 1, 2026 through April 1, 2028.

Opt-Out Effective DateApril 1, 2026
Opt-Out In Effect ThroughApril 1, 2028Opt-out affidavits renew automatically every two years unless cancelled
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesAn opted-out provider can still order and refer for Medicare patients in the categories marked above, even though their own services are not covered.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21012 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$139.05 typical visit price
range $60.73 – $183.44
Typical copayment $34.76 (range $15.18 – $45.86)
Most-billed visit code 99204
Established Patient
$106.59 typical visit price
range $19.60 – $149.17
Typical copayment $26.64 (range $4.90 – $37.29)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

4 YOUR HEALTH
Clinic/Center (Primary Care)
273 PENINSULA FARM RD STE D
ARNOLD, MD 21012
Anne Arundel County (443) 333-0935

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sean Duffy's NPI number?

The NPI number for Sean Duffy is 1033371752. It was assigned to this individual provider in the NPPES registry on June 25, 2008.

Where is Sean Duffy located?

Sean Duffy practices at 273 Peninsula Farm Rd Ste D, Arnold, MD 21012. The listed phone number is (410) 699-9692.

What is Sean Duffy's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Sean Duffy enrolled in Medicare?

No. Sean Duffy has opted out of Medicare through April 1, 2028. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.

What insurance does Sean Duffy accept?

Health plans from Blue Cross and Blue Shield of Texas, Oscar Health Insurance, Oscar Health Maintenance Organization of Florida, Oscar Health Plan of North Carolina, Inc and Oscar Health Plan, Inc. and 2 other insurers list Sean Duffy as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Sean Duffy was last updated on January 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.