Dr. Grant H. Louie, MD

  • Frederick, MD
  • Rheumatologist
NPI1306013214PAC ID4082809546
Medicare services, 2024
189,569
Medicare patients, 2024
855
Part D claims, 2024
1,876
Publications
16
Clinical trials
1
Practice address
161 Thomas Johnson Dr, Frederick, MD 21702
Practice phone
Call (301) 942-7600
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Arthritis and Rheumatism Associates

Frederick, Maryland

See all 7 affiliations

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Dr. Grant H. Louie is a rheumatologist in Frederick, Maryland

Dr. Louie practices at Arthritis and Rheumatism Associates in Frederick, Maryland.

Dr. Louie's NPI, 1306013214, was assigned on May 9, 2008. Dr. Louie graduated from Drexel University College Of Medicine in 2001. Dr. Louie holds Maryland license D0071182.

NPI and contact details
Medicare PAC ID
4082809546
NPI enumeration date
May 9, 2008
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(301) 942-7600
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
51
Medical school graduation
2001

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Grant H. Louie practices at Arthritis and Rheumatism Associates in Frederick, Maryland

Dr. Louie's primary practice is Arthritis and Rheumatism Associates, at 161 Thomas Johnson Dr, Frederick, MD 21702 in Frederick County. The practice phone is (301) 942-7600.

  • Arthritis and Rheumatism Associates
    161 Thomas Johnson Dr, Frederick, MD 21702 · Frederick CountyPhone(301) 942-7600

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Grant H. Louie is affiliated with 5 sites of care and 2 medical groups

Dr. Louie's primary practice is Arthritis and Rheumatism Associates in Frederick, Maryland. Dr. Louie is also affiliated with Frederick Health Hospital. The medical group on file is Amber Hill Therapy Centers. Dmand AI also links Dr. Louie to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.

See all 7 affiliations for Dr. Louie

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Grant H. Louie's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Louie practices, 4 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Arthritis and Rheumatism AssociatesAvailable with a free account
+4 more sites and 1 medical groupAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Grant H. Louie is one of 177 rheumatologists in Maryland

Rheumatology is Dr. Louie's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dr. Louie is board certified in rheumatology by the American Board of Internal Medicine. Dmand AI has Dr. Louie's licenses on file in 2 states: Maryland and California.

Specialties and state licenses

  • Rheumatology, MarylandPrimaryLicense D71182 · 2010 to 2026 · taxonomy 207RR0500X
  • California licenseLicense A80795 · 2002 to 2026

Clinical focus

Dmand AI lists arteritis, arthritis, fibromyalgia and chronic pain, gout, joint arthropathy, joint pain, lupus and muscle disease among the conditions Dr. Louie treats.

Rheumatologists near Dr. Louie

Counts of rheumatologists with a Dmand AI profile, by place and practice. Each opens the list.

177rheumatologists in Maryland
5rheumatologists in Frederick

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Grant H. Louie billed Medicare for 189,569 services in 2024

CMS data shows 189,569 Medicare services from Dr. Louie across 49 procedure codes in 2024, for 855 Medicare patients. Medicare paid $2,681,625 for them. Every service was in an office.

Medicare services, 2024189,569
Medicare patients855
Paid by Medicare$2.7M
Procedure codes49

Dr. Louie's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Drugs given in the office
2023: 131,8292024: 178,59435%
Other services
2023: 2,7502024: 3,77637%
Lab and pathology
2023: 3,1022024: 3,54214%
Tests and treatments
2023: 1,6292024: 1,94419%
Office and hospital visits
2023: 1,0672024: 1,064No change
Surgery
2023: 4882024: 4733%
Imaging
2023: 2282024: 17623%

Dr. Louie compared with the Maryland median for rheumatologists, 2024

  • Dr. Louie
  • Maryland median
Medicare services
189,569vs 3,91548.4 times
Medicare patients
855vs 3002.9 times
Part D claims
1,597vs 7822.0 times

Medians across 168 rheumatologists in Maryland with Dmand AI profiles that report each measure.

Dr. Louie's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Louie

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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Louie and other rheumatologists in Maryland.

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Grant H. Louie treated 855 Medicare patients in 2024, average age 73

CMS counts 855 Medicare patients who saw Dr. Louie in 2024. The largest group is 65 to 74, with 418 patients. 75% of them have arthritis, and 75% have high cholesterol. 7% are also on Medicaid. Their average risk score is 1.17, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Louie's median patient age at 62, with 76% women.

Medicare patients, 2024855
Average age73
Average risk score1.17
Also on Medicaid7%

Dr. Louie's Medicare patients by age, 2024

Dr. Louie's Medicare patients by sex, 2024

  • Women66778%
  • Men18822%

Chronic conditions among Dr. Louie's Medicare patients, 2024

  1. Arthritis75%
  2. High cholesterol75%
  3. High blood pressure69%
  4. Osteoporosis46%
  5. Anxiety30%
  6. Ischemic heart disease30%
  7. Mood disorders29%
  8. Depression26%

Share of Medicare patients with each condition. A patient can have several.

Dr. Louie's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 62

Patient panel by sex, all payers

  • Women76%
  • Men23%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Grant H. Louie wrote 1,876 Medicare Part D claims in 2024

In 2024, Dr. Louie wrote 1,876 Medicare Part D claims for 296 patients. 91% of them were for generic drugs. CMS names the drug for 1,597 of them, across 29 drugs with 11 or more claims each, at $513,675 in total drug cost. In 2023, CMS named 1,505 claims across 30 drugs.

Part D claims, 20241,876
Drugs named by CMS29
Total drug cost$513,675
Part D patients296

Dr. Louie's Part D claims by kind of drug, 2024

  • Generic1,700 claims91%
  • Brand-name and other176 claims9%

Dr. Louie's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Louie's Part D claims, 2024

  • Opioids8%146 of 1,876 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,5052024: 1,5976%

Drugs named by CMS: 29 in 2024, 30 in 2023.

See all prescribing by Dr. Louie

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Grant H. Louie scored 86 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 86 out of 100 for Dr. Louie for performance year 2024, reported as part of a group. Dr. Louie accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Louie as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Dr. Louie's MIPS scores, performance year 2024

  • 86of 100Final score
  • 93.4of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities
  • 59of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Grant H. Louie has 16 publications on record

Dmand AI links 16 papers to Dr. Louie, published from 2009 to 2017. 2010 was the busiest year, with 2. The most frequent topics are Arthritis, Rheumatoid, Socioeconomic Factors and Spondylitis, Ankylosing. Dr. Louie has published most often in Am J Public Health. Dr. Louie's most frequent co-authors are Michael M. Ward, MD, Lora E. Fleming, MD and Alicia M. Hinze, MD.

Papers16
Years published2009 to 2017

Dr. Louie's papers by year, 2009 to 2017

Topics Dr. Louie writes about most

  • Arthritis, Rheumatoid
  • Socioeconomic Factors
  • Spondylitis, Ankylosing

Dr. Louie's most frequent co-authors

Recent publications by Dr. Louie

See all 16 publications and co-authors

See who Dr. Louie researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Louie works with, so you can find a warm path to the right rheumatologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Grant H. Louie has worked on 1 clinical trial

Dmand AI links Dr. Louie to 1 clinical trial. Conditions studied include Arthritis, Rheumatoid and Rheumatic Diseases.

Conditions in Dr. Louie's trials

  • Arthritis, Rheumatoid
  • Rheumatic Diseases

Investigators on the most trials with Dr. Louie

Recent clinical trials with Dr. Louie

Sources: Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)

Dr. Grant H. Louie received $21,433 in industry payments from 2016 to 2024

CMS Open Payments shows 305 general payments to Dr. Louie from 32 drug and device companies from 2016 to 2024. Consulting fees make up the largest share, 65% of the total. Janssen Pharmaceuticals, Inc paid the most, $10,966.

General payments to Dr. Louie by program year, 2016 to 2024

General payments to Dr. Louie by kind, 2016 to 2024

$21.4Kin total
  • Consulting fees$13,85065%
  • Food and beverage$5,38525%
  • Travel and lodging$2,0239%
  • Education$1761%

Companies that paid Dr. Louie the most, 2016 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Louie

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Grant H. Louie has 2 awards and honors on record

Dmand AI lists 2 awards for Dr. Louie, most recently CMS Stage 1 EHR in 2014.

Awards and honors for Dr. Louie

  1. 2014
    • CMS Stage 1 EHR
  2. 2013
    • ACR Fellow

Source: Dmand AI Professional Profile Data

Dr. Grant H. Louie graduated from Drexel University College Of Medicine

Dr. Louie graduated from Drexel University College Of Medicine in 2001. Dr. Louie is a member of ACR.

  1. Medical schoolDrexel University College Of Medicine
  2. Board certified in rheumatologyAmerican Board of Internal Medicine

Source: Dmand AI Professional Profile Data

Dr. Grant H. Louie accepts plans from 5 insurance carriers

Dr. Louie is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Elevance and CareFirst BlueCross BlueShield. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.

  • Blue Cross Blue Shield of Michigan
  • Elevance
  • CareFirst BlueCross BlueShield
  • CMS Medicare
  • DE State Medicaid

Plan types Dr. Louie accepts, by number of carriers

  1. PPO3
  2. HMO2
  3. POS2
  4. EPO1
  5. Medicaid1
  6. Medicare1

Source: Dmand AI Insurance Network Data

Sources for Dr. Grant H. Louie's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Clinical trials and co-investigatorsDmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab)
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Awards and committee rolesDmand AI Professional Profile Data
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Grant H. Louie

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Grant H. Louie's NPI number?

Dr. Grant H. Louie's NPI number is 1306013214. It was assigned on May 9, 2008, and it is active in the NPI Registry.

What kind of doctor is Dr. Grant H. Louie?

Dr. Grant H. Louie is a rheumatologist in Frederick, Maryland. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).

Where does Dr. Grant H. Louie practice?

Dr. Louie practices at 161 Thomas Johnson Dr, Frederick, MD 21702. Dr. Louie's primary practice is Arthritis and Rheumatism Associates in Frederick, Maryland. Dmand AI also links Dr. Louie to 1 hospital, 2 group practices and clinics and 1 medical group.

What is Dr. Grant H. Louie's office phone number?

The practice phone on file for Dr. Louie is (301) 942-7600.

What is Dr. Grant H. Louie's medical license number?

Dr. Louie holds Maryland license D0071182, one of the licenses on file in 2 states.

Which states has Dr. Grant H. Louie been licensed in?

Dmand AI has state licenses on file for Dr. Louie in Maryland (2010 to 2026) and California (2002 to 2026).

Which hospitals is Dr. Grant H. Louie affiliated with?

Dr. Louie is affiliated with Frederick Health Hospital. Dmand AI links Dr. Louie to 1 more hospital.

What medical group is Dr. Grant H. Louie part of?

Dr. Louie is linked to Amber Hill Therapy Centers. Dmand AI links Dr. Louie to 1 more medical group.

Does Dr. Grant H. Louie accept Medicare?

Yes. CMS data shows Dr. Louie billed Medicare for 189,569 services in 2024, and Dr. Louie accepts Medicare assignment.

Does Dr. Grant H. Louie offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Dr. Louie as offering telehealth services.

Show 11 more questionsShow fewer questions

What is Dr. Grant H. Louie's MIPS score?

Dr. Louie's MIPS final score for performance year 2024 is 86 out of 100, reported as part of a group.

How many Medicare patients does Dr. Grant H. Louie see?

CMS counts 855 Medicare patients who saw Dr. Louie in 2024, with an average age of 73.

Is Dr. Grant H. Louie board certified?

Yes. Dr. Louie is board certified in rheumatology by the American Board of Internal Medicine.

What services does Dr. Grant H. Louie bill to Medicare?

In 2024, Dr. Louie's most billed Medicare services were injected or infused drug (J3262), injected or infused drug (J3111) and injected or infused drug (J1602).

Where did Dr. Grant H. Louie go to medical school?

Dr. Louie graduated from Drexel University College Of Medicine in 2001.

What drugs does Dr. Grant H. Louie prescribe most?

In 2024 Medicare Part D data, Dr. Louie's most prescribed drugs by claims were Methotrexate, Prednisone and Hydroxychloroquine Sulfate.

Has Dr. Grant H. Louie received payments from drug or device companies?

CMS Open Payments shows $21,433 in general payments to Dr. Louie from 32 companies from 2016 to 2024. The largest total came from Janssen Pharmaceuticals, Inc.

How long has Dr. Grant H. Louie been practicing?

Dr. Louie graduated from medical school in 2001, 25 years ago.

Does Dr. Grant H. Louie do research?

Dmand AI links 16 publications to Dr. Louie, published from 2009 to 2017. Dr. Louie has worked on 1 clinical trial.

Who does Dr. Grant H. Louie publish with?

Dr. Louie's most frequent co-authors are Michael M. Ward, MD (4 shared papers), Lora E. Fleming, MD (1 shared paper) and Alicia M. Hinze, MD (1 shared paper).

What insurance does Dr. Grant H. Louie accept?

Dr. Louie is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Elevance and CareFirst BlueCross BlueShield. PPO plans come from the most carriers, 3. Check the plan with the practice before a visit.

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