MARY PARKER JOHNSTONE
NPI 1639810807
Physician Assistant in Cambridge, MA
About Mary Parker Johnstone NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY PARKER JOHNSTONE (NPI 1639810807) is an individual physician assistant in Cambridge, Massachusetts, licensed in Massachusetts (PA9335) and active in the NPI registry since April 2022. She is enrolled in Medicare PECOS, is affiliated with Cambridge Health Alliance, and is a graduate of University Of Tennessee, Hsc, College Of Medicine (2021).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Group Practice 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Mary Parker Johnstone is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cambridge Health Alliance
Acute Care Hospitals · Cambridge, MATufts Medical Center
Acute Care Hospitals · Boston, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02139 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Mary Johnstone's NPI number?
The NPI number for Mary Johnstone is 1639810807. It was assigned to this individual provider in the NPPES registry on April 5, 2022.
Where is Mary Johnstone located?
Mary Johnstone practices at 1493 Cambridge St, Cambridge, MA 02139. The listed phone number is (617) 665-1000.
What is Mary Johnstone's specialty?
The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.
Is Mary Johnstone enrolled in Medicare?
Yes. Mary Johnstone is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
What insurance does Mary Johnstone accept?
Health plans from Anthem Blue Cross and Blue Shield list Mary Johnstone as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Mary Johnstone affiliated with any hospitals?
According to CMS data, Mary Johnstone is affiliated with Cambridge Health Alliance and Tufts Medical Center.
When was this NPI record last updated?
The NPPES record for Mary Johnstone was last updated on May 5, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Mary Parker Johnstone · NPI 1639810807
Physician Assistant physician in Cambridge, Massachusetts. Individual provider, active in the CMS NPPES registry since April 5, 2022.
## Identity
- **NPI:** 1639810807 (Entity type: Individual)
- **Enumerated:** April 5, 2022
- **Primary specialty:** Physician Assistant · taxonomy 363A00000X
- **State license:** PA9335 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1493 CAMBRIDGE ST, Cambridge, MA 02139-1099
- **Phone:** (617) 665-1000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** University Of Tennessee, Hsc, College Of Medicine, class of 2021
## Record status
- **NPPES last updated:** May 5, 2023
- **Other identifiers:** Medicaid Q073493 (TN)
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Source: [NPI Profile](https://npiprofile.com/npi/1639810807) · Data from the CMS NPPES public registry.