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This data was extracted on 9/30/2025.

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License NumberC0001920 Mary M. Masterson
License TypePhysician Assistant
License StatusActive  
License Issued07/24/1997  License Expiration:  06/30/2027
Licensure Pathway:  Traditional   
Special License Category:  N/A
 Medical Assistance

Accept Medicaid? No

Maryland Hospital Privilege Information (as reported by licensee)

Johns Hopkins Bayview Medical Center
Johns Hopkins Hospital, The
Frederick Health Hospital
Medical Licenses Held in Other States (as reported by licensee)

Licensee has not reported Medical Licenses Held in Other States information for the profile site.
 Physician Assistant Notification of Collaboration Agreements

Agreement ID: 3682 |  Submit Date: 02/10/2025
Practice Setting: Hospital
Facility: Johns Hopkins Hospital, The
Address: 600 North Wolfe Street
           Baltimore, MD 21287
Advanced Duties: Yes | Prescriptive Authority: Yes | Dispensing Authority: No   
View Collaboration Agreement
Active Supervisee - Delegation Agreement For Core Duties

D0053368  Peter Michael Hill   Status: Approved  |  Approved Date:  12/16/2009  | Agreement No: 8266
Prescribe CDS: Yes  | Non-CDS: Yes  | Medical Devices: Yes
Dispense CDS: No  | Dispense NCDS: No
D0061662  Jonathan Lewis Hansen   Status: Approved  |  Approved Date:  07/21/2023  | Agreement No: 32658
Prescribe CDS: Yes  | Non-CDS: Yes  | Medical Devices: Yes
Dispense CDS: No  | Dispense NCDS: No
D0079781  Amitabh Chandra   Status: Approved  |  Approved Date:  11/07/2023  | Agreement No: 33007
Prescribe CDS: Yes  | Non-CDS: Yes  | Medical Devices: Yes
Dispense CDS: No  | Dispense NCDS: No
Download all Maryland Disciplinary Actions (not time-limited)

All Orders are downloaded in .pdf format.
None.
 Summary of Known Disciplinary Actions by any state medical board (within the past 10 years)   Please Read Description

In Maryland:
No Known Disciplinary Actions by the Maryland Board of Physicians have been reported.
Other States:
No Known Disciplinary Actions by any other state medical board have been reported.
 Pending Charges   Please Read Disclaimer

All Charges are downloaded in .pdf format.
None.
 Other Public Actions in the Practice of the Profession or Administrative Fines (including Maryland)   Please Read Description

No reported Other Public Actions in the Practice of the Profession or Administrative Fines (incl. Maryland) for this licensee.
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