Guillermo William De Leon, MD
Diagnostic Radiology Physician · Dallas, TX
Guillermo William De Leon, MD is a diagnostic radiology physician with a practice address in Dallas, Texas, and NPI 1427001320, issued on May 19, 2006. Check the license (Texas L0124, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Guillermo William De Leon
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- L0124 TX
Self-reported in NPPES; status is on the state search - Practice location
- 3500 Gaston Avenue, Dallas, TX 75246
- Phone
- (214) 826-8822
- Enumerated
- May 19, 2006
- Record last updated
- Feb 15, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (214) 826-9792
- Medicaid IDs
- 159901101 TX
117655405 TX - Medicare enrollment
- Enrolled (PECOS I20031119000593); accepts Medicare assignment
- Medical or professional school
- Temple University School Of Medicine, 1994
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 3,124 in Texas → Look up another NPI →
Also registered at 3500 Gaston Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Amy Childs, MDDiagnostic Radiology Physician1407895063
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Verify Guillermo William De Leon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L0124Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Rose Imaging Specialists PAFort Worth, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Guillermo William De Leon among 3,124 diagnostic radiology physician records in Texas
Guillermo William De Leon, MD is one of 3,124 diagnostic radiology physician records with a practice address in Texas. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 49% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1994 · median 2003 among the 2,277 with a school on file
- Record last updated2012 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
495 diagnostic radiology physician records list a practice address in Dallas
They are 495 of the 36,304 NPPES records with a practice address in Dallas, and 3,124 diagnostic radiology physician records in Texas.
All 3,124 in Texas → Every provider in Dallas → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Julia Agostini, MDDallas, TX 752461417900390
- Samuel Cade, MDDallas, TX 752461568415008
- Walter Cannon, MDDallas, TX 752461205889003
- James Fulmer, MDDallas, TX 752461053364844
- Steven Gilbert, MDDallas, TX 752461578516993
- Manu Gupta, MDDallas, TX 752461477507234
- Joseph Hise, MDDallas, TX 752461568415230
- Hamid Latifi, MDDallas, TX 752461265485700
Common questions
What is Guillermo William De Leon, MD's NPI number?
Guillermo William De Leon, MD's National Provider Identifier (NPI) is 1427001320, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Guillermo William De Leon, MD located?
The NPPES record lists a practice address at 3500 Gaston Avenue, Dallas, TX, 75246. Phone: (214) 826-8822. Providers update this record themselves, so call before visiting.
How can I verify Guillermo William De Leon, MD's license?
NPPES lists Texas license number L0124, 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.
What is Guillermo William De Leon, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.