Grant Louie, M.D.
Rheumatology Physician · Frederick, MD
Grant Louie, M.D. is a rheumatology physician with a practice address in Frederick, Maryland, and NPI 1306013214, issued on May 9, 2008. Check the license (Maryland D0071182, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Grant Louie
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License numbers
- D0071182 MD
D71182 MD
Self-reported in NPPES; status is on the state search - Practice location
- 161 Thomas Johnson Dr Ste 250, Frederick, MD 21702
- Phone
- (301) 942-7600
- Enumerated
- May 9, 2008
- Entity
- Type 1 · individual
Also registered at 161 Thomas Johnson Dr Ste 250
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alyssa Bosso, MDRheumatology Physician1689202350
- Katherine Maher, M.D.Rheumatology Physician1225353865
- Louisa Ziglar, MDRheumatology Physician1538336151
Verify Grant Louie in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0071182Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
9% fewer Medicare Part D claims than the average rheumatology physician in 2024
1,876 Medicare Part D claims for 296 beneficiaries, against an average of 2,058 among the 4,833 providers of this specialty who prescribed in Part D. 146 claims were for opioids.
Most prescribed
- Methotrexate338 claims
- Prednisone235 claims
- Hydroxychloroquine Sulfate219 claims
- Alendronate Sodium77 claims
- Tramadol Hcl74 claims
- Gabapentin58 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's Medicare quality score for 2023: 77.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $131.86
2 payments, mostly food and beverage; the largest payer was Amgen Inc.. The 3,502 providers of this specialty with any payment received $8,487.29 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
2 hospital and facility affiliations
- Amber Hill Physical Therapy IncFrederick, MD
- Arthritis And Rheumatism Associates PCRockville, MD
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Rheumatology Physician providers in Maryland
There are 184 rheumatology physician records in Maryland.
Other rheumatology physician records in Maryland
- Jonathan Adelson, M.D.Greenbelt, MD1700864501
- Naila Ahmad, MDEaston, MD1366451619
- Grace Ahn, M.D.Rockville, MD1982884896
- Ashika Ajitkumar, MDBaltimore, MD1659044436
- Maria Alba-Dauhajre, MDSilver Spring, MD1487676458
- Jemima Felicity Albayda, MDBaltimore, MD1285955765
- Shabnam Ali, M.D.Columbia, MD1487837837
- Mariam Ameri, MDAnnapolis, MD1588807861
- Amanda Auerbach, MDBaltimore, MD1245790187
- Alan Baer, MDBaltimore, MD1730155607
Common questions
What is Grant Louie, M.D.'s NPI number?
Grant Louie, M.D.'s National Provider Identifier (NPI) is 1306013214, issued on May 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Grant Louie, M.D. located?
The NPPES record lists a practice address at 161 Thomas Johnson Dr Ste 250, Frederick, MD, 21702. Phone: (301) 942-7600. Providers update this record themselves, so call before visiting.
How can I verify Grant Louie, M.D.'s license?
NPPES lists Maryland license number D0071182, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Grant Louie, M.D. prescribe under Medicare Part D?
In 2024, Grant Louie, M.D. had 1,876 Medicare Part D claims for 296 beneficiaries; the average among rheumatology physician prescribers was 2,058. Part D covers Medicare prescriptions only.
What is Grant Louie, M.D.'s Medicare quality score?
The 2023 MIPS final score is 77.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.