Mary Parker Johnstone, - Medicare Physician Assistant in Cambridge, MA

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Mary Parker Johnstone, is a medicare enrolled "Physician Assistant" physician in Cambridge, Massachusetts. She went to University Of Tennessee, Hsc, College Of Medicine and graduated in 2021 and has 3 years of diverse experience with area of expertise as Physician Assistant. She is a member of the group practice Cambridge Public Health Commission and her current practice location is 1493 Cambridge St, Cambridge, Massachusetts. You can reach out to her office (for appointments etc.) via phone at (617) 665-1000.

Mary Parker Johnstone is licensed to practice in Massachusetts (license number PA9335) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1639810807.

Contact Information

Mary Parker Johnstone,
1493 Cambridge St,
Cambridge, MA 02139-1099
(617) 665-1000
Not Available

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Physician's Profile

Full NameMary Parker Johnstone
GenderFemale
SpecialityPhysician Assistant
Experience3 Years
Location1493 Cambridge St, Cambridge, Massachusetts
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Mary Parker Johnstone attended and graduated from University Of Tennessee, Hsc, College Of Medicine in 2021
  NPI Data:
  • NPI Number: 1639810807
  • Provider Enumeration Date: 04/05/2022
  • Last Update Date: 05/05/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 8527455484
  • Enrollment ID: I20230503001686

Medical Identifiers

Medical identifiers for Mary Parker Johnstone such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1639810807NPI-NPPES
Q073493MedicaidTN

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207X00000XOrthopaedic Surgery 4930 (Tennessee)Secondary
363A00000XPhysician Assistant PA9335 (Massachusetts)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Cambridge Health AllianceCambridge, MAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Cambridge Public Health Commission8921910894536

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. Mary Parker Johnstone is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
Mary Parker Johnstone,
1493 Cambridge St,
Cambridge, MA 02139-1099

Ph: (617) 665-1000		Mary Parker Johnstone,
1493 Cambridge St,
Cambridge, MA 02139-1099

Ph: (617) 665-1000

Reviews and Comments



Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.