Physician Profile
Rainier J. Diaz, M.D.
Unclaimed ProfileAbout Dr. Diaz
Based in Tucson, AZ, Rainier J. Diaz, M.D. is listed in the NPI registry under psychiatry. According to Medicare claims data, Rainier cared for 142 Medicare patients across 553 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes, and hospital discharge day management, 30 minutes or less.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
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
- (520) 584-5820
- Email not available
Practice Locations
8050 E LAKESIDE PKWY
Tucson, AZ 85730
Conditions Commonly Evaluated or Treated
Within Psychiatry generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Anxiety, trauma, and obsessive-compulsive
Mood disorders
Psychotic disorders
Substance-related and addictive
Addiction & Substance Use
Cognitive and adjustment
Eating Disorders
Eating, sleep, and somatic
Mood & Depression
Neurodevelopmental and behavioral
Personality and dissociative
Sleep & Wakefulness
Procedures & services
Most searched procedures
- Anxiety and depression treatment
- Cognitive behavioral therapy
- Medication management
- Psychiatric evaluation
- Telepsychiatry
Assessment
Addiction care
Addiction Medicine
Assessments
Brain stimulation
Consultations
Diagnostics
Inpatient care
Interventional psychiatry
Psychotherapy
Sleep Medicine
Specialized care
Therapy
Therapy and care
Procedures Most Often Billed to Medicare
553 services · 142 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation | Treatment | 90791 |
22 | As often as other peers in Psychiatry |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
412 | More than most peers in Psychiatry |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | Office visit | 99231 |
62 | As often as other peers in Psychiatry |
| Hospital discharge day management, 30 minutes or less | Office visit | 99238 |
40 | More often than most peers in Psychiatry |
| Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes | Office visit | 99221 |
17 | As often as other peers in Psychiatry |
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 psychiatrists at this location 4
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 3
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 32 related providers in 4 groups
Other psychiatrists in Tucson 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1989 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Psychiatric diagnostic evaluation 8
Providers in AZ who bill this service to Medicare most often.
Common questions
What does Rainier J. Diaz specialize in?
Rainier J. Diaz is a psychiatrist in Tucson, AZ. That is the designation recorded for this NPI in the federal registry, where it is listed as “Psychiatry”.
NPI registry
Where is Rainier J. Diaz located?
Rainier J. Diaz is listed at 8050 E Lakeside Pkwy, Tucson, AZ 85730. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Rainier J. Diaz's phone number?
The number on file is (520) 584-5820. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Rainier J. Diaz's NPI number?
Rainier J. Diaz's National Provider Identifier is 1942256482. 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
Where did Rainier J. Diaz train?
Rainier J. Diaz attended Other, graduating in 1989. This comes from the CMS National Downloadable File.
CMS public data
How long has Rainier J. Diaz been practicing?
Rainier J. Diaz has 37 years experience. Calculated from a graduation year of 1989, reported in the CMS National Downloadable File.
CMS public data
What does Rainier J. Diaz do most often?
According to Medicare billing data, Rainier J. Diaz provides treatments such as psychiatric diagnostic evaluation, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Rainier J. Diaz confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Rainier J. Diaz. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.