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SEAN MICHAEL DWYER M.D.
NPI 1346248044
Internal Medicine - Cardiovascular Disease in Chevy Chase, MD

Active since July 07, 2005PECOS EnrolledAccepts Medicare Assignment
5454 WISCONSIN AVE, SUITE 925, CHEVY CHASE, MD 20815(301) 657-1682(301) 951-8036 Get Directions Write a Review

NPPES record last updated: October 26, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Sean Michael Dwyer M.d. NPPES

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

SEAN MICHAEL DWYER M.D. (NPI 1346248044) is an individual cardiovascular disease provider in Chevy Chase, Maryland, licensed in Maryland (D25818) and active in the NPI registry since July 2005. He is enrolled in Medicare PECOS, is affiliated with Southwestern Vermont Medical Center, and is a graduate of Georgetown University School Of Medicine (1976).

NPPES Registry Identity

NPI1346248044
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameSEAN MICHAEL DWYERCredential: M.D.
Location Address5454 WISCONSIN AVE, SUITE 925Chevy Chase, MD 20815-6901
Mailing Address5454 Wisconsin Ave, Suite 925Chevy Chase, MD 20815-6901 · (301) 657-1682 · Fax (301) 951-8036
Phone(301) 657-1682
Fax(301) 951-8036
Sole ProprietorNo
Medical School CMSGeorgetown University School Of MedicineGraduated 1976
Enumeration DateJuly 7, 2005
Last NPPES UpdateOctober 26, 2007
✔ NPI 1346248044 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in MD · D25818
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
5454 WISCONSIN AVE, Chevy Chase, MD 20815
Open in Google Maps ↗

Other Identifiers 3

Medicare PIN197792
Medicare UPINB94400MD
Medicare PIN013810S12MD

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Sean Michael Dwyer M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6901896521
PECOS Enrollment IDI20221209000137, I20240201003738
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Sean Dwyer reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cardiology & Internal Medicine, PA
Same address
Medical Specialty
5454 WISCONSIN AVE, SUITE 925
Chevy Chase, MD 20815
  • Reassigned Medicare billing, District of Columbia enrollment
  • 7 clinicians in this Medicare group
NPI 1558472407 (301) 657-1682
Southwestern Vermont Medical Center Inc.
338 mi
Primary Care
339 DEWEY ST
Bennington, VT 05201
  • Reassigned Medicare billing, Vermont enrollment
  • Also billed through NPI 1740682921 (Vermont)
  • 143 clinicians in this Medicare group
NPI 1336397926 (802) 442-8164

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
198 services152 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
136 services105 patients
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
48 services48 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
20 services20 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Southwestern Vermont Medical Center

Acute Care Hospitals · Bennington, VT
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number470012
Location100 Hospital DriveBennington, VT 05201 · Bennington County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 20815 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
$147.85 typical visit price
range $65.18 – $194.86
Typical copayment $36.96 (range $16.29 – $48.71)
Most-billed visit code 99204
Established Patient
$80.66 typical visit price
range $21.40 – $158.88
Typical copayment $20.16 (range $5.35 – $39.72)
Most-billed visit code 99213
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 20

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

MEDSTAR MEDICAL GROUP II LLC
General Practice
5454 WISCONSIN AVE, BARLOW BUILDING, 11TH FLOOR
CHEVY CHASE, MD 20815
Montgomery County (855) 605-2225
DR. MICHAEL LLOYD GITTLESON DPM
Podiatrist
5454 WISCONSIN AVE, #1250
CHEVY CHASE, MD 20815
Montgomery County (301) 986-4900
DR. RANDALL JEFFREY LEWIS M.D.
Orthopaedic Surgery (Adult Reconstructive Orthopaedic Surgery)
5454 WISCONSIN AVE, SUITE 1000
CHEVY CHASE, MD 20815
Montgomery County (301) 657-1996
DR. I-JUN LIN-KUNG D.D.S.
Dentist (General Practice)
5454 WISCONSIN AVE, SUITE 635
CHEVY CHASE, MD 20815
Montgomery County (301) 986-1988
WASHINGTON EYE PHYSICIANS & SURGEONS, P.C.
Ophthalmology
5454 WISCONSIN AVE, STE 950
CHEVY CHASE, MD 20815
Montgomery County (301) 657-5700
MR. KEVIN A HARDY DPT
Physical Therapist
5454 WISCONSIN AVE, SUITE 600- PHYSICAL THERAPY
CHEVY CHASE, MD 20815
Montgomery County (301) 942-0442
VIVIAN M FRAGA M.D.
Obstetrics & Gynecology
5454 WISCONSIN AVE, SUITE 1005
CHEVY CHASE, MD 20815
Montgomery County (301) 654-2182
DR. DESPINA M MARKOGIANNAKIS DDS
Dentist
5454 WISCONSIN AVE, SUITE 835
CHEVY CHASE, MD 20815
Montgomery County (301) 652-0656

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 Dwyer's NPI number?

The NPI number for Sean Dwyer is 1346248044. It was assigned to this individual provider in the NPPES registry on July 7, 2005.

Where is Sean Dwyer located?

Sean Dwyer practices at 5454 Wisconsin Ave Suite 925, Chevy Chase, MD 20815. The listed phone number is (301) 657-1682.

What is Sean Dwyer's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Sean Dwyer enrolled in Medicare?

Yes. Sean Dwyer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Sean Dwyer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Dwyer reassigns Medicare benefits to 2 organizations: Cardiology & Internal Medicine, PA (Chevy Chase, MD) and Southwestern Vermont Medical Center Inc. (Bennington, VT). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Sean Dwyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Sean Dwyer affiliated with any hospitals?

According to CMS data, Sean Dwyer is affiliated with Southwestern Vermont Medical Center.

When was this NPI record last updated?

The NPPES record for Sean Dwyer was last updated on October 26, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.