Quick answers
- Which hospitals does May Y. Chiu work at?
- Medicare's official clinician data lists May Y. Chiu at 4 hospitals: Contra Costa Regional Medical Center, John Muir Medical Center - Concord Campus, John Muir Medical Center - Walnut Creek Campus and Sutter Delta Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does May Y. Chiu see patients?
- Medicare's clinician data lists 3 practice locations, including Concord, CA and Antioch, CA. Call before your visit to confirm the address.
- What is May Y. Chiu's specialty?
- Medicare lists Nephrology as the primary specialty.
- Does May Y. Chiu accept Medicare assignment?
- Yes. Medicare's clinician data says May Y. Chiu 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.
- Does May Y. Chiu offer telehealth?
- Medicare's clinician data says May Y. Chiu offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for May Y. Chiu?
- (925) 686-1230, as listed in official Medicare / NPI Registry data.
- What is May Y. Chiu's NPI number?
- 1407857329. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where May Y. Chiu works
Medicare's Facility Affiliation Data lists May Y. Chiu at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Contra Costa Regional Medical CenterMartinez, CA · Acute Care Hospital · CCN 050276
- John Muir Medical Center - Concord CampusConcord, CA · Acute Care Hospital · CCN 050496
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · CCN 050180
- Sutter Delta Medical CenterAntioch, CA · Acute Care Hospital · CCN 050523
Practice locations
Addresses where May Y. Chiu is enrolled with Medicare (CMS data updated 2026-10-02).
- 2222 E St, Suite 305Concord, CA 94520
- 2222 E St, Suite 365Concord, CA 94520 (925) 686‑1230
- 2370 Country Hills Dr, Suite 101Antioch, CA 94509 (925) 779‑9635
Group practices
Medicare enrollment lists May Y. Chiu as a member of this group (CMS data updated 2026-10-02).
- West Coast Kidney56 clinicians in the group
Specialties
- Nephrologyprimary
Other nephrologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 1991 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1407857329 |
| 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