Active NPI
Grant H. Louie, M.D.
- Rheumatology Physician
- Frederick, MD
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Rheumatology Physician
- License
- D0071182
- Practice address
- 161 Thomas Johnson Dr Ste 250
Frederick, MD 21702-4958 - Phone
- (301) 942-7600
- Fax
- (301) 694-0187
- NPI assigned
- May 9, 2008
- Last updated
- Feb 5, 2026
- 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 |
|---|---|---|---|---|
| Rheumatology Physician | 207RR0500X | D71182 | MD | |
| Rheumatology Physician | 207RR0500X | D0071182 | MD | Primary |
Addresses
Primary practice location
161 Thomas Johnson Dr Ste 250
Frederick, MD 21702-4958
Mailing address
7361 Calhoun PL Ste 600
Rockville, MD 20855-2788
Phone (301) 942-7600
Other identifiers 1
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 036428200 | 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
- Rheumatology
- Education
- Hahnemann University College of Medicine, 2001
- Medicare assignment
- Accepts the Medicare-approved amount as payment in full
- Telehealth
- Offers telehealth services
- Group practices
Practice addresses (Care Compare)
14955 Shady Grove Rd
Suite 230
Rockville, MD 20850-8701
Phone (301) 942-7600
161 Thomas Johnson Dr
Suite 250
Frederick, MD 21702-4958
Phone 301942044211203
187 Thomas Johnson Dr
Frederick, MD 21702-4503
2730 University Blvd W
Suite 310
Wheaton, MD 20902-1990
Hospital & facility affiliations
Merit-based Incentive Payment System (MIPS)
- Final score
- 85.72 of 100
- Quality
- 93.41
- Promoting interoperability
- 100
- Improvement activities
- 40
- Cost
- 59
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| D0071182 | MD | MD | Rheumatology Physician |
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Arthritis and Rheumatism Associates PC | Rheumatology | Current | Accepting new patients |
| Frederick Health Hospital Inc | Past | Accepting new patients |
Locations
71 Thomas Johnson Dr
Frederick, MD 21702
Phone (301) 694-5800
14955 Shady Grove Rd
Ste 230
Rockville, MD 20850
Phone (301) 984-6594
7361 Calhoun Pl
Ste 600
Rockville, MD 20855
2730 University Blvd W
Ste 310
Wheaton, MD 20902
Interoperability endpoints
- grant.louiemd.p1@direct.aramd.nextgenshare.com
- https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/
Organizations & group practices 3
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.
-
- Physical Therapist
- Frederick, MD
- NPI 1548290224
-
dba Frederick Health Hospital
- General Acute Care Hospital
- Frederick, MD
- NPI 1538165527
Hospital & facility affiliations 4
Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.
-
dba Frederick Health Hospital
- General Acute Care Hospital
- Frederick, MD
- NPI 1538165527
-
dba WellSpan Waynesboro Hospital
- Clinic/Center
- Fayetteville, PA
- NPI 1306989561
Hospital
-
dba WellSpan Waynesboro Hospital
- General Acute Care Hospital
- Waynesboro, PA
- NPI 1821091059
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1210291200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770249600000",
"number": "1306013214",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "7361 CALHOUN PL STE 600",
"city": "ROCKVILLE",
"state": "MD",
"postal_code": "208552788",
"telephone_number": "301-942-7600",
"fax_number": "301-942-3521"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "161 THOMAS JOHNSON DR STE 250",
"city": "FREDERICK",
"state": "MD",
"postal_code": "217024958",
"telephone_number": "301-942-7600",
"fax_number": "301-694-0187"
}
],
"practiceLocations": [],
"basic": {
"last_name": "LOUIE",
"first_name": "GRANT",
"middle_name": "H.",
"credential": "M.D.",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2008-05-09",
"last_updated": "2026-02-05",
"certification_date": "2026-02-05",
"status": "A"
},
"taxonomies": [
{
"code": "207RR0500X",
"taxonomy_group": "",
"desc": "Internal Medicine, Rheumatology",
"state": "MD",
"license": "D71182",
"primary": false
},
{
"code": "207RR0500X",
"taxonomy_group": "",
"desc": "Internal Medicine, Rheumatology",
"state": "MD",
"license": "D0071182",
"primary": true
}
],
"identifiers": [
{
"code": "05",
"desc": "MEDICAID",
"issuer": null,
"identifier": "036428200",
"state": "MD"
}
],
"endpoints": [],
"other_names": []
}Other providers in Frederick, MD
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 5, 2026; 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.