Quick answers
- Which hospitals does Allen Chao work at?
- Medicare's official clinician data lists Allen Chao at 2 hospitals: Huntington Hospital and Kaiser Foundation Hospital - Los Angeles. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Allen Chao see patients?
- Medicare's clinician data lists 1 practice location in Pasadena, CA. Call before your visit to confirm the address.
- What is Allen Chao's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Allen Chao accept Medicare assignment?
- Yes. Medicare's clinician data says Allen Chao 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 Allen Chao offer telehealth?
- Medicare's clinician data says Allen Chao offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Allen Chao?
- (626) 577-1675, as listed in official Medicare / NPI Registry data.
- What is Allen Chao's NPI number?
- 1952765034. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Allen Chao works
Medicare's Facility Affiliation Data lists Allen Chao at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Huntington HospitalPasadena, CA · Acute Care Hospital · CCN 050438
- Kaiser Foundation Hospital - Los AngelesLos Angeles, CA · Acute Care Hospital · CCN 050138
Practice locations
Addresses where Allen Chao is enrolled with Medicare (CMS data updated 2026-10-02).
- 50 Alessandro Pl, Suite 250Pasadena, CA 91105 (626) 577‑1675
Group practices
Medicare enrollment lists Allen Chao as a member of this group (CMS data updated 2026-10-02).
- Pasadena Nephrology Corporation a Medical Group5 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Pasadena
Clinicians with the same Medicare primary specialty in Pasadena, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Georgetown University School Of Medicine |
| Graduation year | 2016 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1952765034 |
| 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