Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1639810807 Individual Practitioner Female Practitioner

Mary Parker Johnstone

Physician Assistant • Cambridge, MA

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Mary Johnstone is a certified Physician Assistant practicing in Cambridge, MA. With approximately 5 years of clinical experience since graduating from University Of Tennessee, Hsc, College Of Medicine in 2021, Mary Johnstone delivers high-quality medical care to the local community at 1493 CAMBRIDGE ST.

Mary Johnstone maintains professional affiliations with Pratt Medical Group Inc, Cambridge Public Health Commission and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, x-ray of foot, minimum of 3 views. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1493 Cambridge St

Cambridge, MA 021391099

Telephone 6176651000
Associated Practice Facility / Clinic

Medicare Profile & Education

Medical School

University Of Tennessee, Hsc, College Of Medicine

Graduation Year

2021

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Cambridge, MA

Experienced Practitioner (5-10 Yrs)
Practitioner Clinical Experience
5 Yrs -4.9 yrs vs City Avg
City Avg: 9.9 Yrs
State Avg: 10.0 Yrs
Regional Practice Density
99 Specialists

Practicing in Cambridge, MA (4746 Statewide)

Telehealth Adoption Rate
17.2% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount
58.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Johnstone (5 Years) 5 Yrs
Cambridge Specialty Average (9.9 Years) 9.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2023)
Reporting Year:
HCPCS Code & Description Services Patients Submitted Charge Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes
25 23 $138.00 $71.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
15 15 $208.00 $100.58
73630 X-ray of foot, minimum of 3 views
11 11 $128.00 $26.54

Medical Specialties & State Licenses

CMS Verified: 2023-05-05
Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

State License MA PA9335

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Orthopaedic Surgery

NUCC Taxonomy Code: 207X00000X

State License TN 4930

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID
Q073493 (TN)

Hospital & Practice Group Affiliations

Cambridge Public Health Commission

1493 Cambridge St, Cambridge, MA 021391047

Phone: 6176651000

Pratt Medical Group Inc

800 Washigton St, Boston, MA 021111552

Phone: 6176365000

Cambridge Public Health Commission

103 Garland St, Everett, MA 021495066

Phone: 6173896270

Secondary Practice Locations

7887 Wolf River Blvd

Germantown, TN 381381718

Phone: 7316959684

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Dr. Zachary Oliff , DO

Emergency Medicine

NPI 1003300492

Doctor of Osteopathic Medicine (D.O.)

Jennifer Denizard , RN

Registered Nurse

NPI 1003324328

Registered Nurse

Angela De Silva

Registered Nurse - Ambulatory Care

NPI 1003522863
Casey Tran

Occupational Therapist

NPI 1003631508
NPI 1003681735
Ellie Glasgow , PA STUDENT

Physician Assistant

NPI 1013536812

PASTUDENT

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

8 Historical Events
📍
Updated Practice Location May 05, 2023

Registered at 1493 CAMBRIDGE ST, CAMBRIDGE, MA 021391099 (Tel: 6176651000)

📍
Updated Business Mailing Address May 05, 2023

Registered at 1493 CAMBRIDGE ST, CAMBRIDGE, MA 021391099 (Tel: 6176651000)

NPI Profile Active April 05, 2022

NPI status registered as active in NPPES database

📍
Updated Practice Location April 05, 2022

Registered at 7887 WOLF RIVER BLVD, GERMANTOWN, TN 381381718 (Tel: 7316959684)

📍
Updated Business Mailing Address April 05, 2022

Registered at 559 DIANA ST, MEMPHIS, TN 381045300 (Tel: 7316959684)

👤
Provider Name / Credentials Updated April 05, 2022

Recorded as MARY JOHNSTONE

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) April 05, 2022

Orthopaedic Surgery (License #4930 in TN)

🟢
Initial NPI Registration & Enumeration April 05, 2022

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews
No patient reviews submitted yet for Mary Johnstone. Be the first to share your experience!

Sign in to leave a review for Mary Johnstone

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1639810807
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 05, 2022
Last Update: May 05, 2023
Sole Proprietor: Yes

Mailing Address

1493 Cambridge St

Cambridge, MA 021391099

Phone: 6176651000

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.