MR. SUDARSHAN CHATTERJEE MD FACC
NPI 1750465712
Internal Medicine - Interventional Cardiology in Montclair, CA

Q: What is Sudarshan Chatterjee's NPI number?

The NPI number for Sudarshan Chatterjee is 1750465712. It was assigned to this individual provider in the NPPES registry on October 25, 2006.

Q: What is Sudarshan Chatterjee's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Active since October 25, 2006PECOS EnrolledAccepts Medicare Assignment

4950 SAN BERNARDINO ST STE 208, MONTCLAIR, CA 91763(978) 430-3082 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 21, 2022, Jan 15, 2020, Dec 27, 2019 and 6 more (9 updates tracked since 2017).

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About Mr. Sudarshan Chatterjee Md Facc NPPES

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

MR. SUDARSHAN CHATTERJEE MD FACC (NPI 1750465712) is an individual interventional cardiology provider in Montclair, California, licensed in California (C43324) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS, is affiliated with Cooley Dickinson Hospital Inc,the, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1750465712

Entity TypeIndividualMale

Primary Taxonomy207RI0011X

Provider Legal NameMR. SUDARSHAN CHATTERJEECredential: MD FACC

Location Address4950 SAN BERNARDINO ST STE 208Montclair, CA 91763-2328

Mailing Address5810 E Trapper TrlAnaheim, CA 92807-4734 · (909) 398-1503 · Fax (909) 398-4950

Phone(978) 430-3082

Sole ProprietorYes

Medical School CMSOtherGraduated 1975

Enumeration DateOctober 25, 2006

Last NPPES UpdateJuly 21, 20229 updates tracked since enumeration

NPPES CertifiedJanuary 15, 2020

✔ NPI 1750465712 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Interventional CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0011X

License✔ Licensed in CA · C43324

Definition

An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

Also ListedInternal Medicine · Cardiovascular DiseaseTaxonomy 207RC0000X · License 53581 (MA)

4950 SAN BERNARDINO ST STE 208, Montclair, CA 91763

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Secondary Practice Locations 3

Location 1160 Merrimack StMethuen, MA 01844-6117 · Phone (978) 975-0990 · Fax (978) 975-7803

Location 2949 Calhoun Pl Ste DHemet, CA 92543-4403 · Phone (951) 652-8000 · Fax (951) 929-6431

Location 39635 Monte Vista Ave Ste 208Montclair, CA 91763-2235 · Phone (909) 399-0087

Other Identifiers 17

Other201274943Private Health System

Other0104615YPM01Anthem Blue Shield

Other2500732Evercare

Other61066Harvard Pilgrim

Other201274943First Health

Other981971Network Health Plan

OtherC43324CA · Medical Board Of California -department Of Consumer Affairs

OtherJ09303Bcbs Of Mass

Other053581Tufts Health Plan

Other302201063Eds Nh Medicaid

Medicaid3057607MA

Other419452Us Family Health

Other0014180Neighborhood Health Plan

Other31496Fallon Comm Health Plans

Other60560Cigna

Other2500732United Health Care

Other89673Aetna Ushc Hmo Only

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

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

Mr. Sudarshan Chatterjee Md Facc 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 ID7618993007

PECOS Enrollment IDI20170504000941

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 Sudarshan Chatterjee reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Providence Medical Foundation

10 mi

General Practice

1514 VALLEY VISTA DR
Diamond Bar, CA 91765

Reassigned Medicare billing, California enrollment
1,699 clinicians in this Medicare group

NPI 1285890624 (909) 860-1144

Mass General Brigham Medical Group Western Massachusetts Inc

2,486 mi

Family Medicine

30 LOCUST ST
Northampton, MA 01060

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

NPI 1295787919 (413) 582-2898

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 21

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.

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.

566 services376 patients

Technetium tc-99m sestamibi, diagnostic, per study dose A9500

Technetium Tc-99m Sestamibi is a diagnostic test used to create images of your heart or breast tissues. It involves a safe radioactive substance injection that helps doctors to detect any abnormalities or changes in these tissues.

477 services243 patients

Injection, regadenoson, 0.1 mg J2785

Regadenoson injection, 0.1 mg, is a medication used to help visualize the heart during a stress test. It works by increasing blood flow in the arteries of the heart. It's injected into a vein and is generally well-tolerated.

464 services116 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.

436 services416 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.

434 services397 patients

Nuclear medicine studies of heart muscle at rest and with stress and spect 78452

Nuclear medicine studies of the heart involve two parts: rest and stress. During rest, images are taken of your heart at ease. During stress, images are taken after exercise or medication-induced stress. SPECT is a special imaging technique providing 3D pictures of your heart, helping identify any issues.

327 services239 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.

326 services272 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician 93015

An exercise or drug-induced heart stress test with ECG is a procedure performed by a doctor to assess how your heart responds to exertion. It involves monitoring your heart's electrical activity while you exercise or after medication is given to mimic exercise effects.

275 services272 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.

268 services222 patients

Tc-99m from non-highly enriched uranium source, full cost recovery add-on, per study dose Q9969

Tc-99m is a safe radioactive substance used in medical imaging to help diagnose conditions. It's produced from non-highly enriched uranium. The full cost recovery add-on means the total cost of producing and using Tc-99m is included in your bill per study dose.

130 services71 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.

122 services122 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

72 services71 patients

Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or G2212

This service refers to extended doctor visits where your healthcare provider spends additional time evaluating and managing your health beyond the primary procedure's required time. This includes each extra 15 minutes spent by the physician on the same day as the primary service.

51 services38 patients

Injection, perflutren lipid microspheres, per ml Q9957

Perflutren lipid microspheres injection, per ml, is a diagnostic tool used to enhance ultrasound images. It contains tiny gas-filled bubbles that improve the clarity of the images, aiding in a more accurate diagnosis.

25 services13 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.

24 services23 patients

Telephone medical discussion with physician, 21-30 minutes 99443

This service involves a 21-30 minute phone conversation with a physician. It's a chance for you to discuss your health concerns, symptoms or treatment plans. It's similar to an in-person consultation, but conducted over the phone for your convenience and safety.

17 services17 patients

Injection, aminophyllin, up to 250 mg J0280

An aminophyllin injection is a treatment often used for severe asthma or other lung conditions. It helps to relax and open air passages in the lungs, making it easier to breathe. Up to 250 mg can be administered in one dose.

17 services17 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

16 services16 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.

16 services16 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.

14 services12 patients

Electrocardiogram (ecg) 2-day continuous with review and report by health care professional 93224

An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. In a 2-day continuous ECG, sensors attached to your chest monitor your heart's rhythm over 48 hours. A healthcare professional then reviews the data to identify any irregularities.

12 services12 patients

Hospital Affiliations CMS Care Compare

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

Cooley Dickinson Hospital Inc,the

Acute Care Hospitals · Northampton, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220015

Location30 Locust StreetNorthampton, MA 01060 · Hampshire County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91763 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

$136.04 typical visit price

range $59.60 – $179.42

Typical copayment $34.01 (range $14.90 – $44.85)

Most-billed visit code 99204

Established Patient

$104.64 typical visit price

range $19.37 – $146.42

Typical copayment $26.16 (range $4.84 – $36.60)

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.

SUDARSHAN CHATTERJEE MD INC

Internal Medicine (Cardiovascular Disease)

4950 SAN BERNARDINO ST STE 208
MONTCLAIR, CA 91763

San Bernardino County (909) 398-1503

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 Sudarshan Chatterjee's NPI number?

The NPI number for Sudarshan Chatterjee is 1750465712. It was assigned to this individual provider in the NPPES registry on October 25, 2006.

Where is Sudarshan Chatterjee located?

Sudarshan Chatterjee practices at 4950 San Bernardino St Ste 208, Montclair, CA 91763. The listed phone number is (978) 430-3082.

What is Sudarshan Chatterjee's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Is Sudarshan Chatterjee enrolled in Medicare?

Yes. Sudarshan Chatterjee 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 Sudarshan Chatterjee's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sudarshan Chatterjee reassigns Medicare benefits to 2 organizations: Providence Medical Foundation (Diamond Bar, CA) and Mass General Brigham Medical Group Western Massachusetts Inc (Northampton, 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 Sudarshan Chatterjee's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sudarshan Chatterjee accept?

Health plans from Taro Health list Sudarshan Chatterjee 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.

Is Sudarshan Chatterjee affiliated with any hospitals?

According to CMS data, Sudarshan Chatterjee is affiliated with Cooley Dickinson Hospital Inc,the.

When was this NPI record last updated?

The NPPES record for Sudarshan Chatterjee was last updated on July 21, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.