Quick answers
- Where does Mark M. Chung see patients?
- Medicare's clinician data lists 1 practice location in Los Alamitos, CA. Call before your visit to confirm the address.
- What is Mark M. Chung's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Critical Care (Intensivists) and Internal Medicine.
- Does Mark M. Chung accept Medicare assignment?
- Yes. Medicare's clinician data says Mark M. Chung accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Mark M. Chung?
- (562) 991-5679, as listed in official Medicare / NPI Registry data.
- What is Mark M. Chung's NPI number?
- 1740290378. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Mark M. Chung is enrolled with Medicare (CMS data updated 2026-10-02).
- 3791 Katella Ave, Suite 103Los Alamitos, CA 90720 (562) 991‑5679
Specialties
Other pulmonologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Graduation year | 1982 |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740290378 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians