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

Dr. Robert Bryan Mason, MD

Individual provider Neurological Surgery Physician · NPI 1639195795

Dr. Robert Bryan Mason, MD practises Neurosurgery in Washington, District of Columbia. Graduated from Uniformed Services Uhs Fe Hebert School of Med in 1990, 36 years ago. Practices with Mgmc LLC, a 318-clinician group and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
36
Trained at
Uniformed Services Uhs Fe Hebert School of Med
Licensed in
MD
In the registry since
2006
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
Washington, DC 20007 Not confirmed with CMS for 14 years — call before visiting
Phone: (202) 444-4972
Fax: (202) 444-7344
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence D42402 (MD)

Record details

NPI number1639195795
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 14, 2006
Last updated in NPPESMarch 9, 2012

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolUNIFORMED SERVICES UHS FE HEBERT SCHOOL OF MED
Graduated 1990 (36 years in practice)
Group practice Mgmc Llc — 318 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Spinal fusion 45 times · 53rd percentile
Laminectomy or laminotomy (partial removal of spine bones) 20 times · 49th percentile

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients175
Services billed 409 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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 Mgmc LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 318 clinicians in the practice; 12 are shown here.

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