Quick answers
- Which hospitals does Andrew D. Sun work at?
- Medicare's official clinician data lists Andrew D. Sun at 1 hospital: Marian Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Andrew D. Sun see patients?
- Medicare's clinician data lists 2 practice locations, including Arroyo Grande, CA and Pismo Beach, CA. Call before your visit to confirm the address.
- What is Andrew D. Sun's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Andrew D. Sun accept Medicare assignment?
- Yes. Medicare's clinician data says Andrew D. Sun 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 Andrew D. Sun?
- (805) 489-4261, as listed in official Medicare / NPI Registry data.
- What is Andrew D. Sun's NPI number?
- 1487640470. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Andrew D. Sun works
Medicare's Facility Affiliation Data lists Andrew D. Sun at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Marian Regional Medical CenterSanta Maria, CA · Acute Care Hospital · CCN 050107
Practice locations
Addresses where Andrew D. Sun is enrolled with Medicare (CMS data updated 2026-10-02).
- 345 S Halcyon RdArroyo Grande, CA 93420 (805) 489‑4261
- 921 Oak Park Blvd, Suite 101Pismo Beach, CA 93449 (805) 473‑9850
Group practices
Medicare enrollment lists Andrew D. Sun as a member of this group (CMS data updated 2026-10-02).
- Associated Anesthesiologists of the Central Coast35 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Medical College Of Ohio |
| Graduation year | 1986 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487640470 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- 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