Dr. Justin Louie, MD
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 506
- Publications
- 5
- Hospital affiliations
- 2
- Industry payments
- $239
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, California
Find Dr. Louie's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Justin Louie is a gastroenterologist in Stockton, California
Dr. Louie practices at Permanente Medical Group Inc in Stockton, California.
Dr. Louie's NPI, 1518351683, was assigned on March 26, 2015. Dr. Louie graduated from Icahn School Of Medicine At Mount Sinai in 2014. Dr. Louie holds California license A144124.
- NPI
- 1518351683NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769763184
- NPI enumeration date
- March 26, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Justin Louie practices at Permanente Medical Group Inc in Stockton, California
Dr. Louie's primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Justin Louie is affiliated with 3 sites of care and 1 medical group
Dr. Louie's primary practice is Permanente Medical Group Inc in Stockton, California. Dr. Louie is also affiliated with San Francisco Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Louie to 1 more hospital, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Justin Louie's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Louie practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Justin Louie is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Louie's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Louie is board certified in gastroenterology by the American Board of Internal Medicine. Dr. Louie is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Louie
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Justin Louie treated 11 Medicare patients in 2024, average age 62
CMS counts 11 Medicare patients who saw Dr. Louie in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 2.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Louie's median patient age at 53, with 62% women.
Dr. Louie's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
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 53
Patient panel by sex, all payers
- Women62%
- Men38%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Justin Louie wrote 506 Medicare Part D claims in 2024
In 2024, Dr. Louie wrote 506 Medicare Part D claims for 202 patients. 79% of them were for generic drugs. CMS names the drug for 349 of them, across 10 drugs with 11 or more claims each, at $361,459 in total drug cost. In 2023, CMS named 286 claims across 9 drugs.
Dr. Louie's Part D claims by kind of drug, 2024
- Generic399 claims79%
- Brand-name107 claims21%
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
- Antibiotics15%74 of 506 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: 2862024: 34922%
Drugs named by CMS: 10 in 2024, 9 in 2023.
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
How Dr. Justin Louie takes part in Medicare
Dr. Louie accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Justin Louie has 5 publications on record
Dmand AI links 5 papers to Dr. Louie, published from 2014 to 2022. The most frequent topics are Gastrointestinal Neoplasms. Dr. Louie has published most often in Clin Gastroenterol Hepatol. Dr. Louie's most frequent co-authors are Sharmila Anandasabapathy, MD, Karen E. Matsukuma, MD, PhD and Sooraj Tejaswi, MD, MSPH.
Dr. Louie's papers by year, 2014 to 2022
Topics Dr. Louie writes about most
- Gastrointestinal Neoplasms
Dr. Louie's most frequent co-authors
- Sharmila Anandasabapathy, MD2 shared papers
- Karen E. Matsukuma, MD, PhD2 shared papers
- Sooraj Tejaswi, MD, MSPH2 shared papers
Recent publications by Dr. Louie
Clin Liver Dis (Hoboken)
Clin Gastroenterol Hepatol
Best Pract Res Clin Gastroenterol
Clin Gastroenterol Hepatol
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 gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Justin Louie received $239 in industry payments from 2019 to 2020
CMS Open Payments shows 2 general payments to Dr. Louie from 2 drug and device companies from 2019 to 2020. Food and beverage make up the largest share, 100% of the total. Olympus America Inc. paid the most, $125.
General payments to Dr. Louie by program year, 2019 to 2020
Companies that paid Dr. Louie the most, 2019 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Justin Louie graduated from Icahn School Of Medicine At Mount Sinai
Dr. Louie graduated from Icahn School Of Medicine At Mount Sinai in 2014.
- Medical school
- Board certified in gastroenterology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Justin Louie accepts plans from 6 insurance carriers
Dr. Louie is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Kaiser Permanente
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Louie accepts, by number of carriers
- Medicare5
- PPO4
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Justin Louie's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Justin 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. Justin Louie's NPI number?
Dr. Justin Louie's NPI number is 1518351683. It was assigned on March 26, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Justin Louie?
Dr. Justin Louie is a gastroenterologist in Stockton, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Justin Louie practice?
Dr. Louie practices at 7373 West Ln, Stockton, CA 95210. Dr. Louie's primary practice is Permanente Medical Group Inc in Stockton, California. Dmand AI also links Dr. Louie to 1 hospital.
What is Dr. Justin Louie's office phone number?
The practice phone on file for Dr. Louie is (209) 476-2000.
What is Dr. Justin Louie's medical license number?
Dr. Louie holds California license A144124.
Which hospitals is Dr. Justin Louie affiliated with?
Dr. Louie is affiliated with San Francisco Medical Center. Dmand AI links Dr. Louie to 1 more hospital.
What medical group is Dr. Justin Louie part of?
Dr. Louie is linked to The Permanente Medical Group, Inc.
Does Dr. Justin Louie accept Medicare?
Yes. CMS lists Dr. Louie as accepting Medicare assignment.
How many Medicare patients does Dr. Justin Louie see?
CMS counts 11 Medicare patients who saw Dr. Louie in 2024, with an average age of 62.
Is Dr. Justin Louie board certified?
Yes. Dr. Louie is board certified in gastroenterology by the American Board of Internal Medicine.
Show 7 more questionsShow fewer questions
Where did Dr. Justin Louie go to medical school?
Dr. Louie graduated from Icahn School Of Medicine At Mount Sinai in 2014.
What drugs does Dr. Justin Louie prescribe most?
In 2024 Medicare Part D data, Dr. Louie's most prescribed drugs by claims were Pantoprazole Sodium, Gavilyte-C and Mesalamine.
Has Dr. Justin Louie received payments from drug or device companies?
CMS Open Payments shows $239 in general payments to Dr. Louie from 2 companies from 2019 to 2020. The largest total came from Olympus America Inc.
How long has Dr. Justin Louie been practicing?
Dr. Louie graduated from medical school in 2014, 12 years ago.
Does Dr. Justin Louie do research?
Dmand AI links 5 publications to Dr. Louie, published from 2014 to 2022.
Who does Dr. Justin Louie publish with?
Dr. Louie's most frequent co-authors are Sharmila Anandasabapathy, MD (2 shared papers), Karen E. Matsukuma, MD, PhD (2 shared papers) and Sooraj Tejaswi, MD, MSPH (2 shared papers).
What insurance does Dr. Justin Louie accept?
Dr. Louie is in network with 6 carriers, including Blue Cross Blue Shield of Michigan, Kaiser Permanente and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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