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Edit this profileAt a glance
- 2821 S Cascades Trl, Ontario, CA 91761
About Derek Diaz
Listed in the NPI registry as a nurse practitioner, Derek Diaz, NP practices in Ontario, CA. Derek graduated from Western Un of Hlth Sciences, Col of Podiatric Med in 2022. Medicare claims data shows Derek provided 3,659 services to 730 patients. The services billed most often include subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes, initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more, and subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes. NPI 1831811157 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (909) 732-0197
- Email not available
Practice Locations
2821 S CASCADES TRL
Ontario, CA 91761
Procedures Most Often Billed to Medicare
3,659 services · 730 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
3,322 | More than most peers in Nurse Practitioner |
| Initial nursing facility care with high level of medical decision making, per day, if using time, 50 minutes or more | Office visit | 99306 |
323 | More than most peers in Nurse Practitioner |
| Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | Office visit | 99310 |
14 | Less often than most peers in Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners in Ontario 8
Same specialty, same city.
Trained at Western Un of Hlth Sciences, Col of Podiatric Med 1
Other providers in the same specialty who trained at the same institution.
Class of 2022 at Western Un of Hlth Sciences, Col of Podiatric Med 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Derek Diaz's specialty?
Derek Diaz is a nurse practitioner in Ontario, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Derek Diaz?
Derek Diaz is listed at 2821 S Cascades Trl, Ontario, CA 91761. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Derek Diaz?
The number on file is (909) 732-0197. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Derek Diaz?
Derek Diaz's National Provider Identifier is 1831811157. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Derek Diaz's education?
Derek Diaz attended Western Un of Hlth Sciences, Col of Podiatric Med, graduating in 2022. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Derek Diaz have?
Derek Diaz has 4 years experience. Calculated from a graduation year of 2022, reported in the CMS National Downloadable File.
CMS public data
What is Derek Diaz known for?
According to Medicare billing data, Derek Diaz the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Derek Diaz's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Derek Diaz. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.