Jonathan Chang, M.D.
NPI 1285053298 · Gastroenterology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jonathan Chang, M.D. is a Gastroenterology Physician provider in Los Angeles, CA (NPI 1285053298).
Provider details
- NPI number
- 1285053298
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A137665 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 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 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 100 | 94 |
| Pantoprazole Sodium | 22 | 11 |
| Omeprazole | 18 | 13 |
| Mesalamine | 16 | — |
| Cholestyramine (with Sugar)brand: Cholestyramine | 14 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-08
- Last updated
- 2021-12-08
- Certified
- 2020-02-19
Frequently asked questions
- What is Jonathan Chang's NPI number?
- Jonathan Chang's National Provider Identifier (NPI) is 1285053298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jonathan Chang's specialty?
- Jonathan Chang is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Jonathan Chang located?
- Jonathan Chang's practice location on file with NPPES is 1526 N Edgemont St Fl 7, Los Angeles, CA 90027-5260.
- What is Jonathan Chang's phone number?
- The practice phone number listed in the NPPES registry for Jonathan Chang is (323) 819-2651.
- Does Jonathan Chang accept Medicare?
- Jonathan Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jonathan Chang's NPI active?
- Yes — Jonathan Chang's NPI (1285053298) is active in the NPPES registry as of the last update on 2021-12-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.