Dr. Guillermo Leoz-Callizo, MD
- Part D claims, 2024
- 2,878
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 16
- State licenses
- 3
- Practice address
- 215 Westheimer, Houston, TX 77006
- Practice phone
- Call (713) 830-3000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Legacy Community Health - Houston (Westheimer)
FQHC - Main Site · Houston, Texas
Find Dr. Leoz-Callizo's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Guillermo Leoz-Callizo is a psychiatrist in Houston, Texas
Dr. Leoz-Callizo practices at Legacy Community Health - Houston (Westheimer) in Houston, Texas.
Dr. Leoz-Callizo's NPI, 1528475845, was assigned on July 18, 2014. Dr. Leoz-Callizo graduated from Universidad Nacional de Asuncion Faculty of Medicine in 2011. Dr. Leoz-Callizo holds Texas license R7052.
- NPI
- 1528475845NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1557633534
- NPI enumeration date
- July 18, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (713) 830-3000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Guillermo Leoz-Callizo practices at 2 locations in Houston, Texas
Dr. Leoz-Callizo's primary practice is Legacy Community Health - Houston (Westheimer), at 215 Westheimer, Houston, TX 77006 in Harris County. The practice phone is (713) 830-3000. Dr. Leoz-Callizo also practices at Legacy Community Health Services, Inc, 1415 California St, Houston, TX 77006.
- Legacy Community Health - Houston (Westheimer)Primary215 Westheimer, Houston, TX 77006 · Harris CountyPhone(713) 830-3000
- Legacy Community Health Services, Inc1415 California St, Houston, TX 77006 · Harris CountyPhone(832) 548-5000
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Guillermo Leoz-Callizo is affiliated with 1 site of care and 1 medical group
Dr. Leoz-Callizo's primary practice is Legacy Community Health - Houston (Westheimer) in Houston, Texas. The medical group on file is Legacy Community Health. Dr. Leoz-Callizo's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Guillermo Leoz-Callizo's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leoz-Callizo practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Legacy Community Health - Houston (Westheimer) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Guillermo Leoz-Callizo is one of 2,406 psychiatrists in Texas
Psychiatry is Dr. Leoz-Callizo's primary specialty in the NPI Registry, under taxonomy code 2084P0800X. Dr. Leoz-Callizo is board certified in addiction psychiatry by the American Board of Psychiatry and Neurology. Dmand AI has Dr. Leoz-Callizo's licenses on file in 3 states: Texas, Minnesota and Connecticut.
Specialties and state licenses
- Psychiatry, TexasPrimary
- Minnesota license
- Connecticut license
Clinical focus
Dmand AI lists adjustment disease, alcohol use disorders, anxiety, bipolar disorder, depression, insomnia, intellectual and developmental disabilities and schizophrenia among the conditions Dr. Leoz-Callizo treats.
Psychiatrists near Dr. Leoz-Callizo
Counts of psychiatrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Guillermo Leoz-Callizo's patients have a median age of 53
Across all payers, Dmand AI patient panel data puts Dr. Leoz-Callizo's median patient age at 53, with 49% women.
Dr. Leoz-Callizo's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Guillermo Leoz-Callizo wrote 2,878 Medicare Part D claims in 2024
In 2024, Dr. Leoz-Callizo wrote 2,878 Medicare Part D claims for 178 patients. 97% of them were for generic drugs. CMS names the drug for 2,717 of them, across 41 drugs with 11 or more claims each, at $151,224 in total drug cost. In 2023, CMS named 2,604 claims across 44 drugs.
Dr. Leoz-Callizo's Part D claims by kind of drug, 2024
- Generic2,778 claims97%
- Brand-name100 claims3%
Dr. Leoz-Callizo's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Leoz-Callizo's Part D claims, 2024
- Antipsychotics, patients 65 and over6%159 of 2,878 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,6042024: 2,7174%
Drugs named by CMS: 41 in 2024, 44 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Guillermo Leoz-Callizo takes part in Medicare
Dr. Leoz-Callizo accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Guillermo Leoz-Callizo graduated from Universidad Nacional de Asuncion Faculty of Medicine
Dr. Leoz-Callizo graduated from Universidad Nacional de Asuncion Faculty of Medicine in 2011. Dr. Leoz-Callizo is a member of American Academy of Addiction Psychiatry and APA.
- Medical school
- Board certified in addiction psychiatry
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
Dr. Guillermo Leoz-Callizo accepts plans from 16 insurance carriers
Dr. Leoz-Callizo is in network with 16 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Cigna
- HCSC
- Humana
- Alliant Health Plans
- Blue Cross Blue Shield of Massachusetts
- +8 more carriersWith a free account
Plan types Dr. Leoz-Callizo accepts, by number of carriers
- PPO11
- Medicare9
- HMO8
- POS4
- EPO3
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Guillermo Leoz-Callizo's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Guillermo Leoz-Callizo
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Guillermo Leoz-Callizo's NPI number?
Dr. Guillermo Leoz-Callizo's NPI number is 1528475845. It was assigned on July 18, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Guillermo Leoz-Callizo?
Dr. Guillermo Leoz-Callizo is a psychiatrist in Houston, Texas. The primary specialty in the NPI Registry is Psychiatry Physician (taxonomy code 2084P0800X).
Where does Dr. Guillermo Leoz-Callizo practice?
Dr. Leoz-Callizo practices at 215 Westheimer, Houston, TX 77006. Dr. Leoz-Callizo also practices at 1415 California St, Houston, TX 77006. Dr. Leoz-Callizo's primary practice is Legacy Community Health - Houston (Westheimer) in Houston, Texas.
What is Dr. Guillermo Leoz-Callizo's office phone number?
The practice phone on file for Dr. Leoz-Callizo is (713) 830-3000.
What is Dr. Guillermo Leoz-Callizo's medical license number?
Dr. Leoz-Callizo holds Texas license R7052, one of the licenses on file in 3 states.
Which states has Dr. Guillermo Leoz-Callizo been licensed in?
Dmand AI has state licenses on file for Dr. Leoz-Callizo in Texas (2018 to 2026), Minnesota (2017 to 2019) and Connecticut (2017 to 2018).
What medical group is Dr. Guillermo Leoz-Callizo part of?
Dr. Leoz-Callizo is linked to Legacy Community Health.
Does Dr. Guillermo Leoz-Callizo accept Medicare?
Yes. CMS lists Dr. Leoz-Callizo as accepting Medicare assignment.
Is Dr. Guillermo Leoz-Callizo board certified?
Yes. Dr. Leoz-Callizo is board certified in addiction psychiatry by the American Board of Psychiatry and Neurology.
Where did Dr. Guillermo Leoz-Callizo go to medical school?
Dr. Leoz-Callizo graduated from Universidad Nacional de Asuncion Faculty of Medicine in 2011.
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What drugs does Dr. Guillermo Leoz-Callizo prescribe most?
In 2024 Medicare Part D data, Dr. Leoz-Callizo's most prescribed drugs by claims were Trazodone HCl, Quetiapine Fumarate and Clonazepam.
How long has Dr. Guillermo Leoz-Callizo been practicing?
Dr. Leoz-Callizo graduated from medical school in 2011, 15 years ago.
What insurance does Dr. Guillermo Leoz-Callizo accept?
Dr. Leoz-Callizo is in network with 16 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 11. Check the plan with the practice before a visit.
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