Dr. Ronald L. Warnell, M.D.
Psychiatry (Psychiatry Physician)
537 Cajon St
Redlands, CA 92373
Who else practices at this address →
San Bernardino County includes primary care (5% of residents) and mental health (26% of residents) shortage areas. About shortage areas
At a glance
- In the NPI registry since
- 2006
Licensed in California since 1973, according to the Medical Board of California. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Psychiatry Physician primary
CA license G24960 (first issued 1973; current)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Trazodone Hcl Other prescribers in Redlands, CA | 36 |
| Escitalopram Oxalate Other prescribers in Redlands, CA | 19 |
| Citalopram Hbr (citalopram hydrobromide) Other prescribers in Redlands, CA | 14 |
| Duloxetine Hcl Other prescribers in Redlands, CA | 13 |
| Aripiprazole Other prescribers in Redlands, CA | 12 |
| Lamotrigine Other prescribers in Redlands, CA | 12 |
| Mirtazapine Other prescribers in Redlands, CA | 12 |
| Bupropion Hcl Sr (bupropion hcl) Other prescribers in Redlands, CA | 11 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Industry-funded research
Named as a principal investigator on 11 industry-funded studies in 2025, from 2 companies. The companies reported $459,452 in research payments for these studies, mostly to the institutions running them.
- Study of Oral Ubrogepant to Assess Adverse Events and Change in Disease Activity in Adult Participants With Menstrual Migraine
AbbVie Inc. · Active, not recruiting · NCT06417775 - Study of Oral ABBV-932 to Assess Adverse Events and Change in Disease Activity in Adult Participants With Bipolar I or II Disorder
AbbVie Inc. · Completed · NCT06605599 - A Two-Part Multicenter, Double-Blind, Randomized Placebo-Controlled Study to Evaluate Efficacy and Safety and the Maintenance of Effect of 20-mg Seltorexant as Adjunctive Therapy to Antidepressants in Adult and Elderl…
Janssen Research & Development, LLC - M23-714 - Study of Oral Ubrogepant to Assess Adverse Events and Change in Disease Activity in Adult Participants With Menstrual Migraine
AbbVie Inc. - Study to Assess Adverse Events and Change in Disease Activity When Oral ABBV-932 is Added to Antidepressant Therapies in Adult Participants With Generalized Anxiety Disorder
AbbVie Inc. · Recruiting · NCT06846320 - Study of Oral ABBV-932 to Assess Adverse Events and Change in Disease Activity in Adult Participants With Bipolar I or II Disorder (CANTO)
AbbVie Inc. - Study of Oral Ubrogepant to Assess Adverse Events and Change in Disease Activity in Adult Participants With Menstrual Migraine
AbbVie Inc. - Study to Assess Adverse Events and Change in Disease Activity When Oral ABBV-932 is Added to Antidepressant Therapies in Adult Participants With Generalized Anxiety Disorder
AbbVie Inc. - A Two-Part Multicenter, Double-Blind, Randomized Placebo-Controlled Study to Evaluate Efficacy and Safety and the Maintenance of Effect of 20-mg Seltorexant as Adjunctive Therapy to Antidepressants in Adult and Elderl…
Janssen Research & Development, LLC - M23-894 - Study of Oral ABBV-932 to Assess Adverse Events and Change in Disease Activity in Adult Participants With Bipolar I or II Disorder (CANTO)
AbbVie Inc.
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.