Individual provider Active NPI

Grant James Anhalt, M.D.

  • Dermatology Physician
  • Baltimore, MD
National Provider Identifier
1255395539
Registry record updated Dec 9, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Dermatology PhysicianTaxonomy code 207N00000X
License
D28241 Issued in MD
Practice address
601 N Caroline St
Baltimore, MD 21287-0006
Phone
(410) 955-5933
NPI assigned
Apr 14, 2006
Last updated
Dec 9, 2025By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Dec 9, 2025

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Medical Laboratory 291U00000X D28241 MD
Dermatology Physician 207N00000X D28241 MD Primary

Addresses

Primary practice location

601 N Caroline St
Baltimore, MD 21287-0006

Mailing address

6201 Greenleigh Ave
Middle River, MD 21220-2004

Other identifiers 3

IdentifierTypeStateIssuer
AA8372853OtherDCDC LICENSE
D28241OtherMDMD LICENSE
326721100MedicaidMD

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
I20040113000511 MD Practitioner - DermatologyPractitioner - Micrographic Dermatologic Surgery (MDS) 7719883370 Reassigns benefits to 1 organization
I20191106000990 DC Practitioner - Dermatology 7719883370 Reassigns benefits to 1 organization

Care Compare profile

Medicare Care Compare
Specialty
DermatologyAlso: Micrographic Dermatologic Surgery (MDS)
Education
Other, 1975
Medicare assignment
May accept Medicare assignment
Group practices
Johns Hopkins UniversityGroup PAC ID 8921903147, 2,886 clinicians
Johns Hopkins UniversityGroup PAC ID 4981745098, 711 clinicians

Practice addresses (Care Compare)

4940 Eastern Ave
Baltimore, MD 21224-2735
Phone (410) 550-0100

6201 Greenleigh Ave
Middle River, MD 21220-2004

Hospital & facility affiliations

Merit-based Incentive Payment System (MIPS)

Final score
83.31 of 100Reported as group
Quality
73.89
Promoting interoperability
100
Improvement activities
40
Cost
70.47

Procedures performed for Medicare patients

ProcedureNumber of procedures
Removal of skin lesions421
Skin biopsy109

National Provider Directory

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

State licenses

LicenseStateTypeSpecialty
D28241MDMDDermatology Physician

Practice roles

OrganizationSpecialtyStatusNew patients
Johns Hopkins University CurrentSince Apr 4, 2015 Accepting new patients
Johns Hopkins University CurrentSince Sep 15, 2019 Accepting new patients
Johns Hopkins University Current Accepting new patients
Frederick Health Hospital Inc Past Accepting new patients

Locations

5255 Loughboro Rd NW
Washington, DC 20016
Phone (202) 243-2280

4940 Eastern Ave
Baltimore, MD 21224

601 N Caroline St
Baltimore, MD 21287
Phone (410) 955-5080

601 N Caroline St
Fl 8
Baltimore, MD 21287
Phone (410) 955-5933

5755 Cedar Ln
Columbia, MD 21044
Phone (410) 381-7171

6201 Greenleigh Ave
Middle River, MD 21220
Phone (410) 933-2704

Interoperability endpoints

  • Direct secure messaging: ganhalt6847@direct.hopkinsmedicine.org

Organizations & group practices 5

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": "1144972800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765238400000",
    "number": "1255395539",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 GREENLEIGH AVE",
            "city": "MIDDLE RIVER",
            "state": "MD",
            "postal_code": "212202004"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "601 N CAROLINE ST",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212870006",
            "telephone_number": "410-955-5933"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ANHALT",
        "first_name": "GRANT",
        "middle_name": "JAMES",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-04-14",
        "last_updated": "2025-12-09",
        "certification_date": "2025-12-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "MD",
            "license": "D28241",
            "primary": false
        },
        {
            "code": "207N00000X",
            "taxonomy_group": "",
            "desc": "Dermatology",
            "state": "MD",
            "license": "D28241",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "DC LICENSE",
            "identifier": "AA8372853",
            "state": "DC"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "MD LICENSE",
            "identifier": "D28241",
            "state": "MD"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "326721100",
            "state": "MD"
        }
    ],
    "endpoints": [],
    "other_names": []
}

Other providers in Baltimore, MD

Sources for this page

Verify at the official NPI Registry.