MICHAEL T JOHNSTONE M.D.
NPI 1235164336
Internal Medicine - Cardiovascular Disease in Brighton, MA

Q: What is Michael Johnstone's NPI number?

The NPI number for Michael Johnstone is 1235164336. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Q: What is Michael Johnstone's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Michael Johnstone was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since July 11, 2006PECOS EnrolledAccepts Medicare Assignment

736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S, BRIGHTON, MA 02135(617) 562-7690(617) 562-7699 Get Directions Write a Review

NPPES record last updated: April 30, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Apr 30, 2026, Mar 18, 2026 (2 updates tracked since 2026).

On this page

About Michael T Johnstone M.d. NPPES

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

MICHAEL T JOHNSTONE M.D. (NPI 1235164336) is an individual cardiovascular disease provider in Brighton, Massachusetts, licensed in Massachusetts (60598) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Lawrence General Hospital, and maintains a secondary practice location in Brighton.

NPPES Registry Identity

NPI1235164336

Entity TypeIndividualMale

Primary Taxonomy207RC0000X

Provider Legal NameMICHAEL T JOHNSTONECredential: M.D.

Location Address736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'SBrighton, MA 02135-2907

Mailing Address960 Massachusetts Ave, Fl 2Boston, MA 02118

Phone(617) 562-7690

Fax(617) 562-7699

Sole ProprietorNo

Medical School CMSM H Kornberg School Of Dentistry, Temple UniversityGraduated 1982

Enumeration DateJuly 11, 2006

Last NPPES UpdateApril 30, 20262 updates tracked since enumeration

NPPES CertifiedApril 30, 2026

✔ NPI 1235164336 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RC0000X

License✔ Licensed in MA · 60598

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.

Also ListedInternal MedicineTaxonomy 207R00000X · License 60598 (MA)

Also ListedNuclear Medicine · Nuclear CardiologyTaxonomy 207UN0901X · License 60598 (MA)

736 CAMBRIDGE ST, 4TH FL, Brighton, MA 02135

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Secondary Practice Location 1

Location 177 Warren St, 2nd FloorBrighton, MA 02135 · Phone (617) 562-5525 · Fax (617) 562-5546

Other Identifiers 2

Medicaid110048563AMA

Medicaid3154003NH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Michael T Johnstone 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 ID5395753032

PECOS Enrollment IDI20060322000546

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.

Areas of Expertise CMS Part B claims 24

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.

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.

447 services420 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.

359 services204 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.

227 services129 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.

72 services31 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.

53 services52 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.

53 services52 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

53 services52 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

36 services31 patients

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

34 services16 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

31 services31 patients

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

31 services20 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.

31 services31 patients

Ultrasound of heart blood flow, valves and chambers, follow-up 93321

This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.

29 services28 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.

28 services14 patients

Ultrasound study of arm or leg veins with compression and maneuvers 93970

An ultrasound study of arm or leg veins with compression and maneuvers is a non-invasive procedure that uses sound waves to create images of your veins. This helps identify blood clots or other vein problems. During the procedure, pressure is applied to the veins and certain movements are performed to assess blood flow.

27 services27 patients

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

26 services18 patients

Ultrasound of heart with probe in esophagus, with report 93312

This procedure, called a transesophageal echocardiogram, uses a small probe passed into your esophagus to capture detailed images of your heart. The report provides information about your heart's structure and function.

23 services23 patients

Ultrasound of heart blood flow, valves and chambers 93320

An ultrasound of your heart, also known as an echocardiogram, is a test that uses sound waves to create detailed images of your heart. It helps doctors check the health of your heart's chambers, valves, and blood flow.

22 services22 patients

3d radiographic procedure with computerized image postprocessing 76377

A 3D radiographic procedure with computerized image postprocessing is a high-tech imaging test. It uses X-rays to create detailed 3D images of the body. The computerized postprocessing further enhances these images for more precise diagnosis and treatment planning.

18 services18 patients

Ultrasound of leg arteries or artery grafts 93925

An ultrasound of leg arteries or artery grafts is a non-invasive imaging test. It uses high-frequency sound waves to capture live images from inside your body, specifically your leg arteries or grafts. This helps in detecting any blockages or abnormalities.

18 services17 patients

Ultrasound of heart during rest, exercise and/or drug-induced stress with report 93350

This procedure involves using ultrasound imaging to view your heart at rest, during exercise, and/or under drug-induced stress. It helps assess how well your heart responds to exertion. A report of the findings is provided after the test.

17 services17 patients

Ultrasound of heart with probe in esophagus during surgery on heart or great blood vessels with report 93355

This procedure, known as a transesophageal echocardiogram, involves placing a probe in your esophagus to capture detailed images of your heart during surgery. It helps surgeons monitor heart function and guide treatment. A report will follow.

17 services17 patients

Ultrasound of both sides of head and neck blood flow 93880

An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.

17 services17 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.

12 services12 patients

Hospital Affiliations CMS Care Compare 4

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

Lawrence General Hospital

Acute Care Hospitals · Lawrence, MA

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220010

LocationOne General StreetLawrence, MA 01842 · Essex County

Emergency services Birthing friendly

Boston Medical Center

Acute Care Hospitals · Boston, MA

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number220031

Location1 Boston Medical Center PlaceBoston, MA 02118 · Suffolk County

Emergency services Birthing friendly

St Elizabeth's Medical Center

Acute Care Hospitals · Brighton, MA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number220036

Location736 Cambridge StreetBrighton, MA 02135 · Suffolk County

Emergency services Birthing friendly

Good Samaritan Medical Center

Acute Care Hospitals · Brockton, MA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number220111

Location235 North Pearl StreetBrockton, MA 02301 · Plymouth County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 02135 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

$78.84 typical visit price

range $21.07 – $155.29

Typical copayment $19.71 (range $5.26 – $38.82)

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 4

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

MOHAMED F KHAN MD

Internal Medicine (Cardiovascular Disease)

736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA 02135

Suffolk County (617) 562-7690

JOSEPH P CARROZZA JR. M.D.

Internal Medicine (Cardiovascular Disease)

736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA 02135

Suffolk County (617) 562-7690

DR. SHAW R NATAN M.D.

Internal Medicine (Clinical Cardiac Electrophysiology)

736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA 02135

Suffolk County (617) 562-7690

DR. TARIQ MOHI UD DIN BHAT MD

Internal Medicine (Interventional Cardiology)

736 CAMBRIDGE ST, 4TH FL, CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA 02135

Suffolk County (617) 562-7690

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 Michael Johnstone's NPI number?

The NPI number for Michael Johnstone is 1235164336. It was assigned to this individual provider in the NPPES registry on July 11, 2006.

Where is Michael Johnstone located?

Michael Johnstone practices at 736 Cambridge St, 4th Fl Cardiovascular Medicine Suite, 4th Fl Margaret's, Brighton, MA 02135. The listed phone number is (617) 562-7690.

What is Michael Johnstone's specialty?

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

Is Michael Johnstone enrolled in Medicare?

Yes. Michael Johnstone 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.

What insurance does Michael Johnstone accept?

Health plans from Anthem Blue Cross and Blue Shield list Michael Johnstone 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 Michael Johnstone affiliated with any hospitals?

According to CMS data, Michael Johnstone is affiliated with Lawrence General Hospital, Boston Medical Center, St Elizabeth's Medical Center and Good Samaritan Medical Center.

When was this NPI record last updated?

The NPPES record for Michael Johnstone was last updated on April 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.