Individual provider Active NPI

Marissa Hay, FNP

  • Family Nurse Practitioner
  • Washington, DC
National Provider Identifier
1346006913
Registry record updated Feb 22, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Family Nurse PractitionerTaxonomy code 363LF0000X
License
NP1047327 Issued in DC
Practice address
3800 Reservoir Rd NW
Washington, DC 20007-2113
Phone
(410) 772-6500
NPI assigned
Feb 22, 2024
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 22, 2024

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Family Nurse Practitioner 363LF0000X NP1047327 DC Primary

Addresses

Primary practice location

3800 Reservoir Rd NW
Washington, DC 20007-2113

Mailing address

300 M St NE Apt 519
Washington, DC 20002-8081
Phone (309) 253-9697

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in DC
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: No
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20240626002966 DC Practitioner - Nurse Practitioner 4789128182 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2023
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)

3800 Reservoir Rd NW
Washington, DC 20007-2113
Phone (202) 444-2000

Hospital & facility affiliations

  • Medstar Georgetown University Hospital Hospital, Washington, DC, CCN 090004

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Medstar Medical Group II LLC CurrentSince May 1, 2025 Accepting new patients
MGMC, LLC CurrentSince May 1, 2024 Accepting new patients
Medstar Medical Group II LLC CurrentSince May 1, 2024 Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients

Locations

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

3800 Reservoir Rd NW
#2
Washington, DC 20007
Phone (202) 444-7254

110 Irving St NW
Washington, DC 20010
Phone (202) 877-2000

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

3800 Reservoir Rd NW
Ste 2PHC
Washington, DC 20007

Organizations & group practices 4

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 1

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": "1708560000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1708560000000",
    "number": "1346006913",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 M ST NE APT 519",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200028081",
            "telephone_number": "309-253-9697"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3800 RESERVOIR RD NW",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200072113",
            "telephone_number": "410-772-6500"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAY",
        "first_name": "MARISSA",
        "credential": "FNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-02-22",
        "last_updated": "2024-02-22",
        "certification_date": "2024-02-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "DC",
            "license": "NP1047327",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Washington, DC

Sources for this page

Verify at the official NPI Registry.