Individual provider Active NPI

Robert Bryan Mason, M.D.

  • Neurological Surgery Physician
  • Washington, DC
National Provider Identifier
1639195795
Registry record updated Mar 9, 2012
On this page

Key facts

NPPES NPI Registry
Primary specialty
Neurological Surgery PhysicianTaxonomy code 207T00000X
License
D42402 Issued in MD
Practice address
3800 Reservoir Rd
Washington, DC 20007
Phone
(202) 444-4972
Fax
(202) 444-7344
NPI assigned
Jul 14, 2006
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Mar 9, 2012

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Neurological Surgery Physician 207T00000X D42402 MD Primary

Addresses

Primary practice location

3800 Reservoir Rd
Washington, DC 20007

Mailing address

PO Box 418283
Boston, MA 02241-8283
Phone (703) 558-1544

Other identifiers 2

IdentifierTypeStateIssuer
404817200MedicaidMD
P00894805OtherDCRAILROAD MEDICARE

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD, DC2 enrollments
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 2

Enrollment IDStateProvider typePAC IDDetails
I20040706001292 MD Practitioner - Neurosurgery 7517944648 Reassigns benefits to 2 organizations
I20090212000684 DC Practitioner - Neurosurgery 7517944648 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Neurosurgery
Education
Uniformed Services Uhs Fe Hebert School of Med, 1990
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Medstar Medical Group II LLCGroup PAC ID 0547413825, 3,726 clinicians

Practice addresses (Care Compare)

1145 19TH St NW
311 MMG at 19TH Street NW
Washington, DC 20036-3735
Phone (202) 429-2401

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
82.97 of 100Reported as group
Quality
72.87
Promoting interoperability
100
Improvement activities
40
Cost
67.82

Procedures performed for Medicare patients

ProcedureNumber of procedures
Spinal fusion45
Laminectomy or laminotomy (partial removal of spine bones)20

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
49802MNMDFamily Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Medstar Medical Group II LLC CurrentSince May 8, 2025 Accepting new patients
Medstar Medical Group II LLC CurrentSince Oct 1, 2008 Accepting new patients
MGMC, LLC CurrentSince Oct 1, 2008 Accepting new patients
Medstar Medical Group II LLC CurrentSince May 8, 2025 Accepting new patients
WHC Physician Group LLC Neurological Surgery Past Accepting new patients
Medstar Medical Group II LLC Past Accepting new patients
Medstar Washington Hospital Center Past Accepting new patients
Guy W. Gargour, M.D., P.a. Neurological Surgery Past Accepting new patients
Medstar Georgetown Medical Center, Inc Past Accepting new patients
Guy W. Gargour, M.D., P.a. Neurological Surgery Past Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients
Washington Hospital Center Corp Past Accepting new patients

Locations

3800 Reservoir Rd NW
Fl 7
Washington, DC 20007
Phone (202) 444-4972

3800 Reservoir Rd NW
Washington, DC 20007
Phone (202) 687-2203

110 Irving St NW
#19
Washington, DC 20010

110 Irving St NW
Ste G19
Washington, DC 20010
Phone (202) 877-5026

1145 19th St NW
Ste 311
Washington, DC 20036
Phone (202) 429-2401

621 Ridgely Ave
Ste 201
Annapolis, MD 21401
Phone (410) 224-4887

29955 Three Notch Rd
Ste 100
Charlotte Hall, MD 20622
Phone (301) 290-5300

18101 Prince Philip Dr
Ste 101
Olney, MD 20832

6569 N Charles St
Ste 505
Towson, MD 21204
Phone (443) 849-2196

6569 N Charles St
Ste 701
Towson, MD 21204
Phone (410) 825-4928

12825 Minnieville Rd
Woodbridge, VA 22192
Phone (703) 523-9800

Organizations & group practices 12

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

Hospital & facility affiliations 2

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1152835200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1331251200000",
    "number": "1639195795",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 418283",
            "city": "BOSTON",
            "state": "MA",
            "postal_code": "022418283",
            "telephone_number": "703-558-1544"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "20007",
            "telephone_number": "202-444-4972",
            "fax_number": "202-444-7344"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASON",
        "first_name": "ROBERT",
        "middle_name": "BRYAN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-07-14",
        "last_updated": "2012-03-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "MD",
            "license": "D42402",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "404817200",
            "state": "MD"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RAILROAD MEDICARE",
            "identifier": "P00894805",
            "state": "DC"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Washington, DC

Sources for this page

Verify at the official NPI Registry.