Justin Louie, M.D.
NPI 1518351683 · Gastroenterology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Justin Louie, M.D. is a Gastroenterology Physician provider in San Francisco, CA (NPI 1518351683).
Provider details
- NPI number
- 1518351683
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A144124 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
11 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 69 | 31 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 62 | 62 |
| Rifaximinbrand: Xifaxan | 45 | 11 |
| Mesalamine | 45 | 11 |
| Furosemide | 34 | 12 |
| Spironolactone | 27 | 12 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 22 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-03-26
- Last updated
- 2021-12-20
- Certified
- 2020-05-28
Frequently asked questions
- What is Justin Louie's NPI number?
- Justin Louie's National Provider Identifier (NPI) is 1518351683, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Justin Louie's specialty?
- Justin Louie is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Justin Louie located?
- Justin Louie's practice location on file with NPPES is 2425 Geary Blvd, San Francisco, CA 94115-3358.
- What is Justin Louie's phone number?
- The practice phone number listed in the NPPES registry for Justin Louie is (415) 833-4983.
- Does Justin Louie accept Medicare?
- Justin Louie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Justin Louie's NPI active?
- Yes — Justin Louie's NPI (1518351683) is active in the NPPES registry as of the last update on 2021-12-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.