NPIMap

Individual provider Active NPI

Christopher John Mays, M.D.

  • Internal Medicine Physician
  • Olney, MD
National Provider Identifier
1053306829
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Internal Medicine PhysicianTaxonomy code 207R00000X
License
D0039793 Issued in MD
Practice address
18111 Prince Philip Dr
Suite 207
Olney, MD 20832-1513
Phone
(301) 774-7170
Fax
(301) 774-6676
NPI assigned
Sep 16, 2005
Last updated
Jul 13, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Internal Medicine Physician 207R00000X D0039793 MD Primary

Addresses

Primary practice location

18111 Prince Philip Dr
Suite 207
Olney, MD 20832-1513

Mailing address

18111 Prince Philip Dr
Suite 207
Olney, MD 20832-1513
Phone (301) 774-7170

Medicare participation

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

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20090807000369 DC Practitioner - Internal Medicine 3375504418 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
Internal Medicine
Education
University of Maryland School of Medicine, 1988
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
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

18111 Prince Philip Dr
Olney, MD 20832-1513
Phone (301) 774-7170

3007 Tilden St NW
Suite 5N
Washington, DC 20008-3030

6410 Rockledge Dr
Suite 600
Bethesda, MD 20817-1844

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
82.34 of 100Reported as group
Quality
67.9
Promoting interoperability
100
Improvement activities
40
Cost
69.47

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
HHS exclusion list flag
CMS’s directory marks this NPI as on an HHS exclusion list; no matching OIG record was found. The OIG exclusions file (LEIE) holds no record for this NPI, and the directory does not say which list the flag comes from. How exclusions are shown Confirm with the OIG exclusions search.
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
D0039793MDMDInternal Medicine Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Medstar Medical Group II LLC CurrentSince Feb 2, 2015 Accepting new patients
Medstar Medical Group II LLC Internal Medicine Past Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients
Horizon Physicians PC Past Accepting new patients

Locations

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

18111 Prince Philip Dr
Ste 207
Olney, MD 20832
Phone (301) 570-4866

Organizations & group practices 6

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

Hospital & facility affiliations 3

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": "1126828800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1053306829",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "18111 PRINCE PHILIP DR",
            "address_2": "SUITE 207",
            "city": "OLNEY",
            "state": "MD",
            "postal_code": "208321513",
            "telephone_number": "301-774-7170",
            "fax_number": "301-774-6676"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "18111 PRINCE PHILIP DR",
            "address_2": "SUITE 207",
            "city": "OLNEY",
            "state": "MD",
            "postal_code": "208321513",
            "telephone_number": "301-774-7170",
            "fax_number": "301-774-6676"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAYS",
        "first_name": "CHRISTOPHER",
        "middle_name": "JOHN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-16",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "MD",
            "license": "D0039793",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Olney, MD

Sources for this page

Verify at the official NPI Registry.