Diego Andres Castellon, MD
Infectious Disease Physician · San Angelo, TX
Diego Andres Castellon, MD is an infectious disease physician with a practice address in San Angelo, Texas, and NPI 1306331665, issued on Jun 28, 2018. Check the license (Texas V4891, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Diego Andres Castellon
- Credential
- MD
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License numbers
- V4891 TX
326673 NY
Self-reported in NPPES; status is on the state search - Practice location
- 120 E Harris Ave, San Angelo, TX 76903
- Phone
- (325) 747-6741
- Enumerated
- Jun 28, 2018
- Record last updated
- Jun 30, 2025
- Fax
- (325) 747-8377
- Medicare enrollment
- Enrolled (PECOS I20241223001874); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 674 in Texas → Look up another NPI →
Also registered at 120 E Harris Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Stormie Anderson, RNEmergency Registered Nurse1386510410
- Cameron Arakaki, DOEmergency Medicine Physician1457098246
Verify Diego Andres Castellon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license V4891Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average infectious disease physician in 2024
12 Medicare Part D claims, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D.
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
- Shannon ClinicSan Angelo, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diego Andres Castellon among 674 infectious disease physician records in Texas
Diego Andres Castellon, MD is one of 674 infectious disease physician records with a practice address in Texas. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 90% of them.
- NPI issued2018 · 90% of these records are older, 7% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2017 · median 2002 among the 510 with a school on file
- Record last updated2025 · 46% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Texas
There are 674 infectious disease physician records in Texas.
All 674 in Texas → Every provider in San Angelo → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Carmina Aybar Rodriguez, M.D.San Angelo, TX 769031548717309
- Lorena Perez Povis, MDSan Angelo, TX 769031861601270
- William Siebert, M.D.Houston, TX 770021962465765
- Joseph Gathe, M.D.Houston, TX 770041366436263
- Janitzio Guzman, MDHouston, TX 770041235592643
- Thomas Kaspar, M.D.Houston, TX 770041205810629
- Jordan Lake, M.D.Houston, TX 770041700032075
- Benjamin Portnoy, MDHouston, TX 770041073583423
Common questions
What is Diego Andres Castellon, MD's NPI number?
Diego Andres Castellon, MD's National Provider Identifier (NPI) is 1306331665, issued on Jun 28, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Diego Andres Castellon, MD located?
The NPPES record lists a practice address at 120 E Harris Ave, San Angelo, TX, 76903. Phone: (325) 747-6741. Providers update this record themselves, so call before visiting.
How can I verify Diego Andres Castellon, MD's license?
NPPES lists Texas license number V4891, 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 Diego Andres Castellon, MD prescribe under Medicare Part D?
In 2024, Diego Andres Castellon, MD had 12 Medicare Part D claims; the average among infectious disease physician prescribers was 689. 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.