MICHAEL T. JOHNSTONE M.D. – NPI #1235164336
Internal Medicine

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.

Health Care Provider Taxonomy Code for Internal Medicine

MICHAEL JOHNSTONE is a physician located in BRIGHTON, MA. NPPES has assigned the NPI number 1235164336 to MICHAEL JOHNSTONE on July 11, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. With multiple taxonomy codes selected, the primary taxonomy selected by this provider is 207RC0000X from the Health Care Provider Taxonomy code set, which is classified as Internal Medicine, specializing in Cardiovascular Disease

The NPI profile was last updated on Apr 30, 2026. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for MICHAEL JOHNSTONE below.

NPI Profile for
MICHAEL T. JOHNSTONE

NPI Number
1235164336
Enumeration Date

(about 20 years ago)
Entity Type
Type-1  Individual (Male)
Legal Name
MICHAEL T. JOHNSTONE
Credentials
M.D.
Primary location
736 CAMBRIDGE ST, 4TH FL
CARDIOVASCULAR MEDICINE SUITE, 4TH FL MARGARET'S
BRIGHTON, MA 02135-2907
Phone: (617) 562-7690 Fax: (617) 562-7699
1 Other location(s):
77 Warren St
2nd Floor
Brighton, MA 02135
Phone: (617) 562-5525
Fax: (617) 562-5546
Mailing address
960 MASSACHUSETTS AVE
FL 2
BOSTON, MA 02118
Phone: Fax:
Sole Proprietor
No
Updated
Certification Date
Apr 30, 2026

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for MICHAEL JOHNSTONE

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
medicaidMA110048563A
medicaidNH3154003
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
207RC0000X
- Internal Medicine / Cardiovascular Disease (Primary)		 MA 60598
207UN0901X
- Nuclear Medicine / Nuclear Cardiology		 MA 60598
207R00000X
- Internal Medicine		 MA 60598

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Education
M H KORNBERG SCHOOL OF DENTISTRY, TEMPLE UNIVERSITY - Graduated 1982
Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
MICHAEL JOHNSTONE is affiliated with the following medical group(s):
  • HOSPITAL
    • HOLY FAMILY HOSPITAL
      70 EAST STREET
      METHUEN, MA 01844
    • ST ELIZABETH'S MEDICAL CENTER
      736 CAMBRIDGE STREET
      BRIGHTON, MA 02135

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
At any time, providers can make changes to their NPI profile at NPPES. Login to NPPES to make changes online or call (800) 465-3203 for assistance. Changes made at NPPES will be reflected on this web site within a few days.

Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.