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

Douglas J Mayson, MD

Individual provider Neurology Physician · NPI 1821226622

Douglas J Mayson, MD practises Neurology in Washington, District of Columbia. Qualified in 2009, 17 years ago. Practices with Medstar Medical Group II LLC, a 3,717-clinician group, accepts Medicare assignment and offers telehealth. Licensed in District of Columbia, Maryland, New York and Virginia.

Years since qualifying
17
Licensed in
DC, MD, NY, VA
In the registry since
2009
Specialties on file
4
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3800 Reservoir Rd NW Georgetown University Hospital - PHC7
Washington, DC 20007-2113
Phone: (617) 999-7524
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Vascular Neurology Physician (primary) Taxonomy 2084V0102X · Licence MD 042329 (DC)
Neurology Physician Taxonomy 2084N0400X · Licence D77942 (MD)
Vascular Neurology Physician Taxonomy 2084V0102X · Licence 0101256398 (VA)
Vascular Neurology Physician Taxonomy 2084V0102X · Licence 260727 (NY)

Record details

NPI number1821226622
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 30, 2009
Last updated in NPPESJune 23, 2020
Certification dateJune 23, 2020

Medicare enrollment

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

Medicare specialtyNEUROLOGY
Medical schoolOTHER
Graduated 2009 (17 years in practice)
Group practice Medstar Medical Group Ii Llc — 3717 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients260
Services billed 608 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Medstar Medical Group II LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 3717 clinicians in the practice; 12 are shown here.

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