Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mary Parker Johnstone

Individual provider Orthopaedic Surgery Physician · NPI 1639810807

Mary Parker Johnstone is a Physician Assistant in Cambridge, Massachusetts. Graduated from University of Tennessee, Hsc, College of Medicine in 2021, 5 years ago. Practices with Cambridge Public Health Commission, a 649-clinician group, works from 2 locations, accepts Medicare assignment and offers telehealth. Licensed in Massachusetts and Tennessee.

Years since qualifying
5
Trained at
University of Tennessee, Hsc, College of Medicine
Licensed in
MA, TN
In the registry since
2022
Specialties on file
2

Practice location Address checks out

1493 Cambridge St
Cambridge, MA 02139-1099
Phone: (617) 665-1000
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 7887 Wolf River Blvd, Germantown, TN 38138-1718 — (731) 695-9684

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence PA9335 (MA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence 4930 (TN)

Record details

NPI number1639810807
Entity typeIndividual (Type 1)
GenderFemale
Sole proprietorYes
NPI enumeratedApril 5, 2022
Last updated in NPPESMay 5, 2023
Certification dateMay 5, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolUNIVERSITY OF TENNESSEE, HSC, COLLEGE OF MEDICINE
Graduated 2021 (5 years in practice)
Group practice Cambridge Public Health Commission — 649 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Other providers in Cambridge