MICHAEL T JOHNSTONE M.D.
NPI 1235164336
Internal Medicine - Cardiovascular Disease in Brighton, MA
NPI Status: Active since July 11, 2006
Contact Information
736 CAMBRIDGE ST, 4TH FL
CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA
ZIP 02135
Phone: (617) 562-7690
Fax: (617) 562-7699
- Individual
- Male
- Years of Experience 44
- Internal Medicine
- Cardiovascular Disease
- Accepts Insurance
- Accepts Medicare Approved Payment
- PECOS Enrolled
About MICHAEL JOHNSTONE
This page provides the complete NPI Profile along with additional information for Michael Johnstone, an internist established in Brighton, Massachusetts with a medical specialization in Internal Medicine, focusing in cardiovascular disease and more than 44 years of experience. He graduated from M H Kornberg School Of Dentistry, Temple University in 1982. The healthcare provider is registered in the NPI registry with number 1235164336 assigned on July 2006. The practitioner's primary taxonomy code is 207RC0000X with license number 60598 (MA). The provider is registered as an individual and his NPI record was last updated April 2026.
- NPI
- 1235164336
- Provider Name
- MICHAEL T JOHNSTONE M.D.
- Gender
- Male
- Entity Type
- Individual
- Location Address
- 736 CAMBRIDGE ST, 4TH FL CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S BRIGHTON, MA 02135
- Location Phone
- (617) 562-7690
- Location Fax
- (617) 562-7699
- Mailing Address
- 960 MASSACHUSETTS AVE FL 2 BOSTON, MA 02118
- Medical School Name
- M H KORNBERG SCHOOL OF DENTISTRY, TEMPLE UNIVERSITY
- Graduation Year
- 1982
- Is Sole Proprietor?
- No
- Enumeration Date
- 07-11-2006
- Last Update Date
- 04-30-2026
- Code Navigator
An internist like Michael Johnstone is a physician who has completed an internal medicine residency and is board-certified or board-eligible in an internist specialty. Internists are trained to care for adults of all ages for many different medical conditions. An internist typically monitors chronic physical conditions, identifies acute diseases, provides family planning, provides counseling about wellness and disease prevention, etc.
Location Map
Secondary Locations
- 77 Warren St 2nd Floor
Brighton, MA 02135
(617) 562-5525
Specialty - Primary Taxonomy
The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.
- Classification
Internal Medicine Cardiovascular Disease
- Taxonomy Code
- 207RC0000X
- Type
- Allopathic & Osteopathic Physicians
- License No.
- 60598
- License State
- MA
- Taxonomy Description
- 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.
Secondary Taxonomies
The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.
| No. | Taxonomy Code | Type | Classification / Specialization |
License No. (State) |
|---|---|---|---|---|
| 1 | 207R00000X | Allopathic & Osteopathic Physicians | Internal Medicine | 60598 (MA) |
| 2 | 207UN0901X | Allopathic & Osteopathic Physicians | Nuclear Medicine | 60598 (MA) |
Insurance Plans Accepted
According to publicly available information the provider might be accepting the following health plans from these health insurance companies:
- Anthem Bronze Access Blue New England HMO 6000/20%/8000 w/HSA - HMO
- Anthem Bronze Access Blue New England HMO 7000/50%/8000 w/HSA - HMO
- Anthem Bronze Access Blue New England HMO 7500/30%/10000 Value - HMO
- Anthem Bronze Access Blue New England HMO 8500/50%/9200 - HMO
- Anthem Gold Access Blue New England HMO 1000/20%/7500 - HMO
- Anthem Gold Access Blue New England HMO 2000/0%/6500 RxD - HMO
- Anthem Gold Access Blue New England HMO 2000/10%/4600 w/HSA - HMO
- Anthem Gold Access Blue New England HMO 2000/10%/7500 - HMO
- Anthem Gold Access Blue New England HMO 2000/20%/4600 w/HSA - HMO
- Anthem Gold Access Blue New England HMO 3000/0%/7500 RxD - HMO
- Anthem Gold Access Blue New England HMO 500/30%/9000 - HMO
- Anthem Platinum Access Blue New England HMO 250/10%/3500 - HMO
- Anthem Silver Access Blue New England HMO 2500/30%/10000 Value - HMO
- Anthem Silver Access Blue New England HMO 3000/30%/9000 Value - HMO
- Anthem Silver Access Blue New England HMO 3500/20%/10000 - HMO
- Anthem Silver Access Blue New England HMO 3500/20%/7250 w/HSA - HMO
- Anthem Silver Access Blue New England HMO 4000/0%/9000 - HMO
- Anthem Silver Access Blue New England HMO 4000/0%/9000 RxD - HMO
- Anthem Silver Access Blue New England HMO 4000/10%/7250 w/HSA - HMO
- Anthem Silver Access Blue New England HMO 4000/20%/8500 - HMO
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.
*Please verify directly with this provider to make sure your insurance plan is currently accepted.
Additional Identifiers
The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.
| Identifier | Type / Code | Identifier State | Identifier Issuer |
|---|---|---|---|
| 110048563A | MEDICAID (05) | MA | |
| 3154003 | MEDICAID (05) | NH |
Medicare Participation & PECOS Enrollment Status
Michael Johnstone is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.
Michael Johnstone is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.
What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.
Is the provider registered in PECOS? Yes
PECOS PAC ID: 5395753032
What is the PECOS Associate Control ID?
A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.PECOS Enrollment ID: I20060322000546
What is the Provider Enrollment ID?
The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.Accepts Medicare Assignment? Yes
What does it mean "accepts medicare assignment"?
When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes
Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes
Eligible to Order or Refer a Home Health Agency (HHA): Yes
Eligible to Order or Refer Power Mobility Devices: Yes
Areas of Expertise
The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.
3d radiographic procedure with computerized image postprocessing
Critical care, first 30-74 minutes
Established patient office or other outpatient visit, 20-29 minutes
Established patient office or other outpatient visit, 30-39 minutes
Established patient office or other outpatient visit, 30-39 minutes
Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician
Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes
Ultrasound of both sides of head and neck blood flow
Ultrasound of heart blood flow, valves and chambers
Ultrasound of heart blood flow, valves and chambers, follow-up
Ultrasound of heart during rest, exercise and/or drug-induced stress with report
Ultrasound of heart with color-depicted blood flow, rate and valve function
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
Ultrasound of heart with probe in esophagus during surgery on heart or great blood vessels with report
Ultrasound of heart with probe in esophagus, with report
Ultrasound of heart, follow-up
Ultrasound of leg arteries or artery grafts
Ultrasound study of arm or leg veins with compression and maneuvers
Ultrasound study of one arm or leg veins with compression and maneuvers
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.
This service was performed 16 times for 15 patientsCritical 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.
This service was performed 52 times for 19 patientsThis 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.
This service was performed 14 times for 13 patientsThis 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.
This service was performed 225 times for 122 patientsThis 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.
This service was performed 29 times for 21 patientsAn 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.
This service was performed 54 times for 53 patientsAn 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.
This service was performed 54 times for 53 patientsInitial 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.
This service was performed 45 times for 44 patientsA 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.
This service was performed 485 times for 305 patientsA 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.
This service was performed 32 times for 24 patientsFollow-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.
This service was performed 110 times for 51 patientsFollow-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.
This service was performed 49 times for 18 patientsAn 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.
This service was performed 37 times for 37 patientsAn 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.
This service was performed 37 times for 36 patientsThis 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.
This service was performed 16 times for 16 patientsThis 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.
This service was performed 15 times for 15 patientsAn 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.
This service was performed 55 times for 54 patientsThis 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.
This service was performed 409 times for 394 patientsThis 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.
This service was performed 18 times for 18 patientsThis 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.
This service was performed 25 times for 24 patientsA 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.
This service was performed 42 times for 40 patientsAn 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.
This service was performed 24 times for 24 patientsAn 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.
This service was performed 24 times for 23 patientsThis 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.
This service was performed 75 times for 72 patientsPhysician Visit Costs
The typical physician office visit costs for Medicare beneficiaries in this area are: $36.02 for a new patient copayment and $19.71 for an established patient copayment.
The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.
For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.
The prices below reflect the costs for new and established patients in the 02135 ZIP code area.
New Patients Visit Costs *
The most utilized procedure code for new patients office visits is 99204
- Average New Patient Price $144.11
- Minimum New Patient Price $63.72
- Maximum New Patient Price $189.86
- Average New Patient Copayment $36.02
- Minimum New Patient Copayment $15.93
- Maximum New Patient Copayment $47.46
Established Patients Visit Costs *
The most utilized procedure code for established patients office visits is 99213
- Average Established Patient Price $78.84
- Minimum Established Patient Price $21.07
- Maximum Established Patient Price $155.29
- Average Established Patient Copayment $19.71
- Minimum Established Patient Copayment $5.26
- Maximum Established Patient Copayment $38.82
* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.
Find Provider Hospital Affiliations - Privileges
Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.
Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Michael Johnstone is affiliated with the following medical facilities:
| Hospital Name | Address | Phone | Hospital Type | Overall Rating |
|---|---|---|---|---|
| LAWRENCE GENERAL HOSPITAL | ONE GENERAL STREET LAWRENCE, MA 01842 | (978) 683-4000 | Acute Care Hospitals | |
| BOSTON MEDICAL CENTER | 1 BOSTON MEDICAL CENTER PLACE BOSTON, MA 02118 | (617) 638-8000 | Acute Care Hospitals | |
| ST ELIZABETH'S MEDICAL CENTER | 736 CAMBRIDGE STREET BRIGHTON, MA 02135 | (617) 789-3000 | Acute Care Hospitals | |
| GOOD SAMARITAN MEDICAL CENTER | 235 NORTH PEARL STREET BROCKTON, MA 02301 | (508) 427-3000 | Acute Care Hospitals |
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NPI NPI Number Validation
How NPI Validation Works
The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.
To verify the NPI 1235164336, we treat the final digit (6) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 64. The final step is to find the difference between that total and the next multiple of ten (70 - 64 = 6).
Digit-by-digit view
Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.
Step 1: Double every other digit from the right
Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.
Step 2: Add all digits plus the NPI constant
Add the transformed values, the unchanged digits, and the constant 24.
Step 3: Find the amount needed to reach the next multiple of 10
The next multiple of ten after 64 is 70. The difference is the calculated check digit.
Other Providers at the Same Location
The following 4 providers are registered at the same or a nearby location.
BRIGHTON, MA 02135
BRIGHTON, MA 02135
BRIGHTON, MA 02135
BRIGHTON, MA 02135
Frequently Asked Questions
The NPI number assigned to this healthcare provider is 1235164336, enumerated as an "individual" on July 11, 2006.
The provider is located at 736 CAMBRIDGE ST, 4TH FL CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S BRIGHTON, MA 02135 and the phone number is (617) 562-7690.
Internal Medicine with taxonomy code 207RC0000X and a focus in Cardiovascular Disease.
The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield, Medicare and. Please consult your insurance carrier or call the provider to verify.
Michael Johnstone is affiliated with: LAWRENCE GENERAL HOSPITAL, BOSTON MEDICAL CENTER, ST ELIZABETH'S MEDICAL CENTER and GOOD SAMARITAN MEDICAL CENTER.
