Michael Chan, M.D.
NPI 1841442464 · Internal Medicine Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chan, M.D. is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1841442464).
Provider details
- NPI number
- 1841442464
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A102377 (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
17 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 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 173 | 167 |
| Pantoprazole Sodium | 109 | 35 |
| Omeprazole | 102 | 42 |
| Azathioprine | 56 | 12 |
| Mesalamine | 37 | 11 |
| Ursodiol | 29 | — |
| Ciprofloxacin Hcl | 27 | 27 |
| Lipase/Protease/Amylase |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-10-14
- Last updated
- 2021-12-07
- Certified
- 2021-12-07
Frequently asked questions
- What is Michael Chan's NPI number?
- Michael Chan's National Provider Identifier (NPI) is 1841442464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chan's specialty?
- Michael Chan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Chan located?
- Michael Chan's practice location on file with NPPES is 1983 Marengo St, Los Angeles, CA 90033-1370.
- What is Michael Chan's phone number?
- The practice phone number listed in the NPPES registry for Michael Chan is (562) 882-8889.
- Does Michael Chan accept Medicare?
- Michael Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chan's NPI active?
- Yes — Michael Chan's NPI (1841442464) is active in the NPPES registry as of the last update on 2021-12-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.