Guillermo Leoz-Callizo, MD
Psychiatry Physician · Houston, TX
Guillermo Leoz-Callizo, MD is a psychiatry physician with a practice address in Houston, Texas, and NPI 1528475845, issued on Jul 18, 2014. Check the license (Texas R7052, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Guillermo Leoz-Callizo
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License numbers
- R7052 TX
62571 MN
Self-reported in NPPES; status is on the state search - Practice location
- 1415 California St, Houston, TX 77006
- Phone
- (832) 548-5000
- Enumerated
- Jul 18, 2014
- Record last updated
- Feb 19, 2026
- Fax
- (832) 548-5092
- Medicare enrollment
- Enrolled (PECOS I20181017001746); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 3,318 in Texas → Look up another NPI →
Also registered at 1415 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Dawn Adams, MDInternal Medicine Physician1710974290
- Virginia Allen, MDChild & Adolescent Psychiatry Physician1801090212
- Judith AlvaradoProfessional Counselor1629503313
- Jeannie Banh, D.O.Family Medicine Physician1407293046
- Leyla Baran Akce, M.D.Psychiatry Physician1457641813
- Anika Barber, FNP-BCFamily Nurse Practitioner1659609097
Verify Guillermo Leoz-Callizo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license R7052Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average psychiatry physician in 2024
2,878 Medicare Part D claims for 178 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims.
Most prescribed
- Trazodone Hcl260 claims
- Quetiapine Fumarate208 claims
- Clonazepam207 claims
- Escitalopram Oxalate157 claims
- Aripiprazole146 claims
- Duloxetine Hcl129 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Legacy Community Health Services, IncHouston, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guillermo Leoz-Callizo among 3,318 psychiatry physician records in Texas
Guillermo Leoz-Callizo, MD is one of 3,318 psychiatry physician records with a practice address in Texas. 72% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 68% of them.
- NPI issued2014 · 68% of these records are older, 29% newer
- In a Medicare fileYes · 72% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated2011 · median 2006 among the 1,481 with a school on file
- Record last updated2026 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Texas
There are 3,318 psychiatry physician records in Texas.
All 3,318 in Texas → Every provider in Houston → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Holly Crisp, M.D.Houston, TX 770061619108883
- Ricardo Delcid, MDHouston, TX 770061023349867
- Gabrielle Hobday, M.D.Houston, TX 770061992954846
- Tayfun Karakoc, M.D.Houston, TX 770061265487904
- Stephanie Kwok, MDHouston, TX 770061861656704
- Chad Lemaire, MDHouston, TX 770061235392432
- Michael Lesem, MDHouston, TX 770061871605998
- Nathalie Marie, MDHouston, TX 770061730354812
Common questions
What is Guillermo Leoz-Callizo, MD's NPI number?
Guillermo Leoz-Callizo, MD's National Provider Identifier (NPI) is 1528475845, issued on Jul 18, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo Leoz-Callizo, MD located?
The NPPES record lists a practice address at 1415 California St, Houston, TX, 77006. Phone: (832) 548-5000. Providers update this record themselves, so call before visiting.
How can I verify Guillermo Leoz-Callizo, MD's license?
NPPES lists Texas license number R7052, as entered by the provider. Search the Texas Medical Board at https://profile.tmb.state.tx.us/Search.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Guillermo Leoz-Callizo, MD prescribe under Medicare Part D?
In 2024, Guillermo Leoz-Callizo, MD had 2,878 Medicare Part D claims for 178 beneficiaries; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.