Derick Ly, D.O., M.S.
NPI 1962744417 · Psychiatry Physician · Ontario, CA
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derick Ly, D.O., M.S. is a Psychiatry Physician provider in Ontario, CA (NPI 1962744417).
Provider details
- NPI number
- 1962744417
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O., M.S.
- Sex
- Male
- Sole proprietor
- No
- License
- 13326 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
32 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 32 | $59 |
Typical Medicare-allowed amounts for these services range $59–$59 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trazodone Hcl | 84 | 11 |
| Benztropine Mesylate | 67 | — |
| Aripiprazole | 65 | — |
| Sertraline Hcl | 64 | — |
| Quetiapine Fumarate | 52 | — |
| Bupropion Hclbrand: Bupropion Xl | 44 | — |
| Haloperidol | 43 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$195 across 6 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 303 E Vanderbilt WaySan Bernardino, CA 92415-0026Phone: (909) 252-5149
Registry dates
- Enumerated
- 2013-03-22
- Last updated
- 2025-03-31
- Certified
- 2025-03-31
Frequently asked questions
- What is Derick Ly's NPI number?
- Derick Ly's National Provider Identifier (NPI) is 1962744417, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derick Ly's specialty?
- Derick Ly is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Derick Ly located?
- Derick Ly's practice location on file with NPPES is 2940 Inland Empire Blvd, Ontario, CA 91764-4898.
- What is Derick Ly's phone number?
- The practice phone number listed in the NPPES registry for Derick Ly is (909) 458-1350.
- Does Derick Ly accept Medicare?
- Derick Ly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derick Ly's NPI active?
- Yes — Derick Ly's NPI (1962744417) is active in the NPPES registry as of the last update on 2025-03-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.