DR. SETH MCCLENNEN MD
NPI 1265419410
Internal Medicine - Clinical Cardiac Electrophysiology in South Weymouth, MA

Q: What is Seth Mcclennen's NPI number?

The NPI number for Seth Mcclennen is 1265419410. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Q: What is Seth Mcclennen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.

Q: When was this NPI record last updated?

The NPPES record for Seth Mcclennen was last updated on March 13, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.

Active since December 29, 2005PECOS EnrolledAccepts Medicare Assignment

541 MAIN ST, SUITE 400, SOUTH WEYMOUTH, MA 02190(781) 952-1200(781) 340-1610 Get Directions Write a Review

NPPES record last updated: March 13, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Seth Mcclennen Md NPPES

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

DR. SETH MCCLENNEN MD (NPI 1265419410) is an individual clinical cardiac electrophysiology provider in South Weymouth, Massachusetts, licensed in Massachusetts (160065) and active in the NPI registry since December 2005. He is enrolled in Medicare PECOS, is affiliated with South Shore Hospital, and is a graduate of Geisel School Of Medicine At Dartmouth (1997).

NPPES Registry Identity

NPI1265419410

Entity TypeIndividualMale

Primary Taxonomy207RC0001X

Provider Legal NameDR. SETH MCCLENNENCredential: MD

Location Address541 MAIN ST, SUITE 400South Weymouth, MA 02190-1868

Mailing Address541 Main St, Suite 400South Weymouth, MA 02190-1868 · (781) 952-1200 · Fax (781) 340-1610

Phone(781) 952-1200

Fax(781) 340-1610

Sole ProprietorNo

Medical School CMSGeisel School Of Medicine At DartmouthGraduated 1997

Enumeration DateDecember 29, 2005

Last NPPES UpdateMarch 13, 2014

✔ NPI 1265419410 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Clinical Cardiac ElectrophysiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RC0001X

License✔ Licensed in MA · 160065

Definition

A field of special interest within the subspecialty of cardiovascular disease, specialty of Internal Medicine, which involves intricate technical procedures to evaluate heart rhythms and determine appropriate treatment for them.

Also ListedInternal MedicineTaxonomy 207R00000X · License 160065 (MA)

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License 160065 (MA)

541 MAIN ST, South Weymouth, MA 02190

Open in Google Maps ↗

Other Identifiers 9

OtherAA11795MA · Harvard Pilgrim

Medicare UPINI00975MA

Other469016MA · Tufts Health Plan

Other91036MA · Fallon Comm Health Plan

OtherJ27401MA · Blue Cross Blue Shield

Medicaid2062861MA

Medicare PINA36416MA

Other0033355MA · Neighborhood Health Plan

Medicare PINSX2430MA

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

Dr. Seth Mcclennen Md 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 ID6305839168

PECOS Enrollment IDI20040407000032

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

Medicare enrollment records show Seth Mcclennen reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Harbor Medical Associates, Inc.

Same address

Cardiovascular Disease

541 MAIN ST, SUITE 400
South Weymouth, MA 02190

Reassigned Medicare billing, Massachusetts enrollment
419 clinicians in this Medicare group

NPI 1124079561 (781) 952-1240

Brigham & Womens Physicians Organization Inc

13 mi

Internal Medicine

75 FRANCIS ST
Boston, MA 02115

Reassigned Medicare billing, Massachusetts enrollment
4,574 clinicians in this Medicare group

NPI 1033535497 (617) 732-5500

Mass General Brigham Medical Group Suburban Massachusetts Inc

18 mi

Family Medicine

2014 WASHINGTON STREET
Newton, MA 02462

Reassigned Medicare billing, Massachusetts enrollment
992 clinicians in this Medicare group

NPI 1538191218 (617) 243-6262

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 44

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.

Evaluation of single, dual, multiple lead or leadless pacemaker system or implantable defibrillator system, remote up to 90 days 93296

This procedure involves remotely monitoring your pacemaker or implantable defibrillator system. Over a 90-day period, we check the device's performance and your heart's activity. This helps ensure the device is functioning properly and providing the best possible support for your heart health.

2,214 services721 patients

Evaluation of single, dual, multiple lead or leadless pacemaker system, remote up to 90 days 93294

This procedure evaluates your pacemaker system remotely for up to 90 days. It checks whether single, dual, multiple lead, or leadless pacemakers are working properly. It's a safe, convenient way to ensure your heart device is functioning optimally.

1,716 services536 patients

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.

1,230 services1,059 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

958 services837 patients

Anticoagulant management of patient taking warfarin 93793

Anticoagulant management with warfarin involves monitoring and adjusting your medication to prevent blood clots while minimizing the risk of bleeding. Regular blood tests measure your response to warfarin, helping adjust your dose if necessary. It's crucial to maintain a consistent diet and promptly report any changes in your health.

845 services60 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

646 services605 patients

Evaluation of cardiac rhythm monitor system, remote up to 30 days 93298

This procedure involves remotely monitoring your heart rhythm for up to 30 days. A small device will record your heart's activity, which can be accessed by your healthcare team. This aids in diagnosing any irregularities or issues with your heart function.

569 services66 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

524 services516 patients

Evaluation of single, dual, or multiple lead implantable defibrillator system, remote up to 90 days 93295

This procedure involves remotely monitoring your implantable defibrillator system, which can have single, dual, or multiple leads. Over a period of up to 90 days, the system's performance is evaluated to ensure it's working properly and providing the necessary heart rhythm support.

501 services194 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

500 services205 patients

Evaluation of implantable heart and blood vessel monitoring system, remote up to 30 days 93297

This service involves remotely monitoring your heart and blood vessel implant system for up to 30 days. Using advanced technology, healthcare professionals can track the device's performance and your health status, ensuring the system is working optimally for your needs.

381 services158 patients

Programming of dual lead pacemaker system 93280

Programming of a dual lead pacemaker system is a procedure to adjust your heart's pacemaker settings. This process involves a small device, called a programmer, that communicates with your pacemaker to ensure it's working optimally for your heart's needs.

367 services334 patients

Blood test, clotting time 85610

A clotting time blood test helps determine how quickly your blood forms clots, a process crucial to stop bleeding. During the test, a small blood sample is taken from your arm. The sample is then analyzed in a lab to see how long it takes for a clot to form.

344 services28 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

295 services38 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.

232 services226 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

183 services149 patients

Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes 99152

This procedure involves a doctor administering a medication to reduce your consciousness during a procedure. This helps in managing discomfort and anxiety. The initial application lasts for 15 minutes and is for individuals aged 5 years or older.

146 services142 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

134 services134 patients

Routine electrocardiogram (ecg) using at least 12 leads with tracing 93005

An Electrocardiogram (ECG) is a simple, painless test that records the heart's electrical activity. Using 12 leads attached to your skin, it generates a tracing of your heart rhythm. It helps detect any heart problems by showing the timing and strength of electrical signals passing through each part of your heart.

127 services126 patients

Evaluation of implantable heart and blood vessel monitoring system 93290

An evaluation of an implantable heart and blood vessel monitoring system involves checking the device that's placed inside your body to monitor your heart and blood vessels' health. It helps doctors track your heart rate, rhythm, and blood flow, aiding in prompt, accurate treatment.

125 services120 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

115 services72 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

104 services104 patients

Programming of multiple lead implantable defibrillator system 93284

Programming of a multiple lead implantable defibrillator system involves adjusting settings on your implanted device to help control irregular heart rhythms. The process is non-invasive and helps ensure optimal device performance for maintaining heart health.

90 services81 patients

Programming of single lead pacemaker system 93279

Programming of a single lead pacemaker system involves adjusting the pacemaker's settings to suit your heart's unique needs. This is done using a special device that communicates with the pacemaker, ensuring it helps your heart beat at an optimal rate.

66 services57 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

52 services52 patients

Programming of single lead implantable defibrillator system 93282

Programming of a single lead implantable defibrillator system involves setting up and adjusting a device implanted in your body. This device helps regulate your heartbeat. It can detect irregular heart rhythms and provide corrective electric shocks to restore a normal heartbeat.

48 services46 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

42 services42 patients

Insertion of pacemaker and upper and lower heart chamber electrode 33208

A pacemaker insertion is a procedure where a small device, called a pacemaker, is implanted under your skin. This device uses electrical pulses to prompt the heart to beat at a normal rate. Electrodes are placed in the upper and lower chambers of your heart to help regulate your heartbeat.

41 services41 patients

Programming of dual lead implantable defibrillator system 93283

Programming of a dual lead implantable defibrillator system involves adjusting settings on a device implanted in your chest. This device monitors your heart rhythm and delivers electrical pulses to correct irregular heartbeats, helping maintain a healthy heart rhythm.

35 services33 patients

External shock to heart to regulate heart beat 92960

This procedure, known as cardioversion, uses an external electrical shock to restore your heart's normal rhythm. It's typically performed when irregular heartbeats, or arrhythmias, are causing severe symptoms and aren't responding to medications.

33 services25 patients

Heart rhythm recording of continous external ekg over 8-15 days 93246

A heart rhythm recording is a non-invasive procedure where a small device, attached externally, monitors your heart's electrical activity for 8-15 days. It helps detect irregular heart rhythms, assess heart rate, and guide treatment decisions. It's safe, painless, and can be done during normal daily activities.

33 services33 patients

Heart rhythm review and interpretation of continous external ekg over 8-15 days 93248

This service involves wearing a device for 8-15 days that continuously records your heart's electrical activity. It helps in identifying irregular heart rhythms. The recorded data is then reviewed and interpreted by a healthcare professional for any abnormalities.

32 services32 patients

Comprehensive electrophysiologic evaluation with catheter destruction of abnormality of upper chamber of heart causing supraventricular tachycardia (rapid heart rate) 93653

This procedure is a detailed study of your heart's electrical activity. A thin tube (catheter) is inserted into your heart to identify and eliminate the area causing a fast heart rate. This helps restore normal heart rhythm, specifically targeting the upper chamber of the heart.

30 services29 patients

Comprehensive electrophysiologic evaluation with catheter destruction of abnormality causing atrial fibrillation (uncoordinated contraction of upper chambers of heart) by pulmonary vein isolation 93656

This is a procedure to treat atrial fibrillation, a condition causing irregular heartbeats. It involves a detailed heart evaluation using electrophysiology. A catheter is then used to destroy the problematic area causing the issue. Specifically, isolation of the pulmonary vein is done to regulate the heartbeat.

30 services30 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

28 services24 patients

Destruction of tissue of upper heart chamber through tube to treat abnormal heart rhythm 93657

This procedure involves using a tube, or catheter, to access your upper heart chamber. Special tools are then used to destroy a small area of heart tissue causing abnormal rhythm. This helps reset your heart's regular rhythm, improving heart function.

26 services24 patients

Electrocardiogram (ecg) 2-day continuous with review by health care professional 93227

An Electrocardiogram (ECG) is a test that checks your heart's activity. The 2-day continuous ECG records your heart's rhythm non-stop for 48 hours. It helps to detect irregularities that may not occur during a shorter test. A healthcare professional will review the results to identify any issues.

25 services25 patients

Electrocardiogram (ecg) 2-day continuous 93225

An Electrocardiogram (ECG) 2-day continuous is a non-invasive test that records the electrical activity of your heart over 48 hours. It helps to detect irregular heart rhythms, heart disease, or other cardiac conditions. You wear a portable device that records heart activity as you go about your daily activities.

24 services24 patients

Programming of multiple lead pacemaker system 93281

Programming of a multiple lead pacemaker system involves adjusting settings on your pacemaker device to optimize its function. This device uses electrical impulses to regulate your heart's rhythm. The procedure ensures it's working effectively for your specific needs.

23 services20 patients

Insertion of heart rhythm monitor under skin 33285

The insertion of a heart rhythm monitor under the skin is a procedure to track your heart's activity. A small device is placed under your skin, recording your heart's rhythms continuously. This helps identify irregular heartbeats or conditions, aiding in your treatment.

19 services19 patients

Removal and replacement of dual lead permanent pacemaker 33228

This procedure involves removing an old dual lead pacemaker and replacing it with a new one. A pacemaker helps regulate your heart's rhythm. The dual lead model has two wires connecting to your heart to improve its electrical signaling. The replacement is done under local anesthesia.

17 services17 patients

Insertion of left lower heart electrode for pacemaker or defibrillator 33225

The procedure involves placing a small electrode in your left lower heart region. This electrode is part of a pacemaker or defibrillator, devices that help regulate your heart rhythm. It's done under local anesthesia, and you may feel mild discomfort.

16 services16 patients

Insertion of catheters and destruction of tissue to treat abnormal heart rhythm 93655

This procedure involves placing small tubes (catheters) into your heart via a blood vessel. These catheters emit energy that corrects irregular heartbeats by eliminating the problematic heart tissue. It's a common, minimally invasive method to treat abnormal heart rhythms.

16 services12 patients

Removal and replacement of multiple lead defibrillator 33264

A multiple lead defibrillator helps regulate your heart's rhythm. If it's not functioning properly, it may need to be replaced. In this procedure, the old device is carefully removed and a new one is inserted. It's done under local anesthesia, minimizing discomfort.

15 services15 patients

Hospital Affiliations CMS Care Compare 3

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

South Shore Hospital

Acute Care Hospitals · South Weymouth, MA

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220100

Location55 Fogg RoadSouth Weymouth, MA 02190 · Norfolk County

Emergency services Birthing friendly

Brigham And Women's Hospital

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220110

Location75 Francis StreetBoston, MA 02115 · Suffolk County

Emergency services Birthing friendly

Faulkner Hospital-Brigham And Women's

Acute Care Hospitals · Boston, MA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220119

Location1153 Centre StreetBoston, MA 02130 · Suffolk County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02190 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

$144.11 typical visit price

range $63.72 – $189.86

Typical copayment $36.02 (range $15.93 – $47.46)

Most-billed visit code 99204

Established Patient

$111.18 typical visit price

range $21.07 – $155.29

Typical copayment $27.79 (range $5.26 – $38.82)

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 20

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

MELODY OBRIEN

Counselor

541 MAIN ST, SUITE 303
WEYMOUTH, MA 02190

Norfolk County (781) 331-7866

MISS DAPHNEY KASSIANA KERSAINT

Counselor (Mental Health)

541 MAIN ST
WEYMOUTH, MA 02190

Norfolk County (781) 331-7866

DR. PAUL J. SCHUBERT MD

Internal Medicine (Cardiovascular Disease)

541 MAIN ST, SUITE 400
SOUTH WEYMOUTH, MA 02190

Norfolk County (781) 952-1200

BRENDA ANN KELLY MSW

Social Worker (Clinical)

541 MAIN ST, SUITE 216 STETSON BUILDING
WEYMOUTH, MA 02190

Norfolk County (781) 982-1443

MRS. JENNIFER YANIKOSKI

Counselor (Mental Health)

541 MAIN ST, SUITE 303
WEYMOUTH, MA 02190

Norfolk County (781) 331-7866

JOHN FINLEY

Counselor (Mental Health)

541 MAIN ST
WEYMOUTH, MA 02190

Norfolk County (781) 331-7866

BRENDAN VLADIMIR FRANCOIS

Counselor (Mental Health)

541 MAIN ST
WEYMOUTH, MA 02190

Norfolk County (617) 790-4800

GARY C. KIMBALL PT, OCS

Physical Therapist

541 MAIN ST, SUITE 103
SOUTH WEYMOUTH, MA 02190

Norfolk County (781) 331-9600

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 Seth Mcclennen's NPI number?

The NPI number for Seth Mcclennen is 1265419410. It was assigned to this individual provider in the NPPES registry on December 29, 2005.

Where is Seth Mcclennen located?

Seth Mcclennen practices at 541 Main St Suite 400, South Weymouth, MA 02190. The listed phone number is (781) 952-1200.

What is Seth Mcclennen's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Clinical Cardiac Electrophysiology, with taxonomy code 207RC0001X.

Is Seth Mcclennen enrolled in Medicare?

Yes. Seth Mcclennen 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 Seth Mcclennen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Seth Mcclennen reassigns Medicare benefits to 3 organizations: Harbor Medical Associates, Inc. (South Weymouth, MA), Brigham & Womens Physicians Organization Inc (Boston, MA) and Mass General Brigham Medical Group Suburban Massachusetts Inc (Newton, MA). 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 Seth Mcclennen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Seth Mcclennen affiliated with any hospitals?

According to CMS data, Seth Mcclennen is affiliated with South Shore Hospital, Brigham And Women's Hospital and Faulkner Hospital-Brigham And Women's.

When was this NPI record last updated?

The NPPES record for Seth Mcclennen was last updated on March 13, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.