Active NPI
Grant James Anhalt, M.D.
- Dermatology Physician
- Baltimore, MD
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Dermatology Physician
- License
- D28241
- Practice address
- 601 N Caroline St
Baltimore, MD 21287-0006 - Phone
- (410) 955-5933
- NPI assigned
- Apr 14, 2006
- Last updated
- Dec 9, 2025
- Sex
- Male
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 2
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| 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
| Identifier | Type | State | Issuer |
|---|---|---|---|
| AA8372853 | Other | DC | DC LICENSE |
| D28241 | Other | MD | MD LICENSE |
| 326721100 | Medicaid | MD |
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Enrolled in MD, DC
- Eligible to order & refer
- Part B services: Yes
- Medical equipment: Yes
- Home health: Yes
- Power mobility devices: Yes
- Hospice: Yes
Enrollment records 2
Care Compare profile
Medicare Care Compare- Specialty
- Dermatology
- Education
- Other, 1975
- Medicare assignment
- May accept Medicare assignment
- Group practices
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 100
- Quality
- 73.89
- Promoting interoperability
- 100
- Improvement activities
- 40
- Cost
- 70.47
Procedures performed for Medicare patients
| Procedure | Number of procedures |
|---|---|
| Removal of skin lesions | 421 |
| Skin biopsy | 109 |
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| D28241 | MD | MD | Dermatology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Johns Hopkins University | Current | Accepting new patients | |
| Johns Hopkins University | Current | 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
- 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.
-
dba Jhu - Anesthesia Pain MGMT
- Pain Medicine (Anesthesiology) Physician
- Baltimore, MD
- NPI 1922008549
-
dba Jhu - Dermatology
- Dermatology Physician
- Baltimore, MD
- NPI 1659377323
DC
-
dba Jhu - Pathology
- Anatomic Pathology & Clinical Pathology Physician
- Baltimore, MD
- NPI 1477540904
-
dba JHU - 6849 Old Dominion Drive - Physician
- Neurology Physician
- McLean, VA
- NPI 1598552226
-
dba Frederick Health Hospital
- General Acute Care Hospital
- Frederick, MD
- NPI 1538165527
Hospital & facility affiliations 3
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
- General Acute Care Hospital
- Baltimore, MD
- NPI 1790700904
-
dba Johns Hopkins Bayview Care Center
- Chronic Disease Hospital
- Baltimore, MD
- NPI 1336251412
-
- General Acute Care Hospital
- Baltimore, MD
- NPI 1578597993
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
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 9, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
- Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.