Individual provider Active NPI

Mary Jane McMahon Reen, M.D.

  • Pediatrics Physician
  • Washington, DC
National Provider Identifier
1669867784
Registry record updated Jul 17, 2019
On this page

Key facts

NPPES NPI Registry
Primary specialty
Pediatrics PhysicianTaxonomy code 208000000X
License
MD046450 Issued in DC
Practice address
3800 Reservoir Rd NW
Dept of Pediatrics
Washington, DC 20007-2113
Phone
(202) 243-3434
Fax
(202) 243-3234
NPI assigned
Apr 6, 2015
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Jul 17, 2019

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X
Pediatrics Physician 208000000X MD046450 DC Primary

Addresses

Primary practice location

3800 Reservoir Rd NW
Dept of Pediatrics
Washington, DC 20007-2113

Mailing address

3800 Reservoir Rd NW
Dept of Pediatrics
Washington, DC 20007-2113
Phone (202) 243-3434

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in DC, MD2 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
I20190812000595 DC Practitioner - Pediatric Medicine 3173850377 Reassigns benefits to 2 organizations
I20190812000814 MD Practitioner - Pediatric Medicine 3173850377 Reassigns benefits to 2 organizations

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
MD046450DCMDPediatrics Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Medstar Medical Group II LLC CurrentSince May 1, 2025 Accepting new patients
MGMC, LLC Current Accepting new patients
Medstar Medical Group II LLC CurrentSince Aug 1, 2019 Accepting new patients
Medstar Medical Group II LLC CurrentSince Aug 1, 2019 Accepting new patients
Medstar Georgetown Medical Center, Inc Past Accepting new patients
Medstar - Georgetown Medical Center, Inc. Past Accepting new patients
Medstar Medical Group II LLC PastSince May 1, 2025 Accepting new patients

Locations

4200 Wisconsin Ave NW
Ste 200
Washington, DC 20016
Phone (267) 825-2184

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

4200 Wisconsin Ave NW
Ste 400
Washington, DC 20016
Phone (202) 243-3558

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

4200 Wisconsin Ave NW
Washington, DC 20016
Phone (202) 243-3400

3800 Reservoir Rd NW
Fl 5
Washington, DC 20007
Phone (202) 444-0086

3800 Reservoir Rd NW
Ste 5CCC
Washington, DC 20007

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

7503 Surratts Rd
Clinton, MD 20735
Phone (301) 868-8000

7503 Surratts Rd
Fl 1
Clinton, MD 20735

25500 Point Lookout Rd
Leonardtown, MD 20650
Phone (301) 475-6106

Organizations & group practices 7

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.

NPI Registry JSON

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

{
    "created_epoch": "1428278400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1563321600000",
    "number": "1669867784",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW",
            "address_2": "DEPT OF PEDIATRICS",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "202-243-3434",
            "fax_number": "202-243-3234"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW",
            "address_2": "DEPT OF PEDIATRICS",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "202-243-3434",
            "fax_number": "202-243-3234"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "REEN",
        "first_name": "MARY JANE",
        "middle_name": "MCMAHON",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2015-04-06",
        "last_updated": "2019-07-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "DC",
            "license": "MD046450",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Washington, DC

Sources for this page

Verify at the official NPI Registry.