Quick answers
- Where does Derick L. Ly see patients?
- Medicare's clinician data lists 2 practice locations, including Ontario, CA and San Bernardino, CA. Call before your visit to confirm the address.
- What is Derick L. Ly's specialty?
- Medicare lists Psychiatry as the primary specialty.
- Does Derick L. Ly accept Medicare assignment?
- Yes. Medicare's clinician data says Derick L. Ly 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 Derick L. Ly offer telehealth?
- Medicare's clinician data says Derick L. Ly offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Derick L. Ly?
- (909) 458-9628, as listed in official Medicare / NPI Registry data.
- What is Derick L. Ly's NPI number?
- 1962744417. 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 Derick L. Ly is enrolled with Medicare (CMS data updated 2026-10-02).
- 2940 Inland Empire BlvdOntario, CA 91764 (909) 458‑9628
- 820 E Gilbert StSan Bernardino, CA 92415 (909) 387‑7200
Group practices
Medicare enrollment lists Derick L. Ly as a member of this group (CMS data updated 2026-10-02).
- County of San Bernardino79 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Ontario
Clinicians with the same Medicare primary specialty in Ontario, CA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2012 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1962744417 |
| 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