Derek W. Guillory, M.D.
Emergency Medicine Physician · La Vernia, TX
Derek W. Guillory, M.D. is an emergency medicine physician with a practice address in La Vernia, Texas, and NPI 1710972880, issued on Sep 15, 2005. Check the license (Texas L5751, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Derek W. Guillory
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- L5751 TX
Self-reported in NPPES; status is on the state search - Practice location
- 202 FM 1346, La Vernia, TX 78121
- Phone
- (830) 779-3200
- Enumerated
- Sep 15, 2005
- Record last updated
- Nov 28, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (830) 779-3211
- Medicaid IDs
- 167798102 TX
167798105 TX - Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Verify Derek W. Guillory in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license L5751Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average emergency medicine physician in 2024
37 Medicare Part D claims for 18 beneficiaries, against an average of 226 among the 54,106 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.
Derek W. Guillory among 4,885 emergency medicine physician records in Texas
Derek W. Guillory, M.D. is one of 4,885 emergency medicine physician records with a practice address in Texas. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2016 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 emergency medicine physician records list a practice address in La Vernia
They are 2 of the 92 NPPES records with a practice address in La Vernia, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in La Vernia → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Claire Escamilla, M.D.La Vernia, TX 781211639150410
- Melissa Popp, D.O.Floresville, TX 781141558307124
- Patrick Barrett, MDNew Braunfels, TX 781301790985927
- Roy Crownover, MDNew Braunfels, TX 781301710938022
- Daniel De Los Santos, M.D.New Braunfels, TX 781301417205675
- Natasha Demehri, M.D.New Braunfels, TX 781301114285731
- John Flanagan, MDNew Braunfels, TX 781301730159823
- Sumit Guha, M.D.New Braunfels, TX 781301144278698
Common questions
What is Derek W. Guillory, M.D.'s NPI number?
Derek W. Guillory, M.D.'s National Provider Identifier (NPI) is 1710972880, issued on Sep 15, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Derek W. Guillory, M.D. located?
The NPPES record lists a practice address at 202 FM 1346, La Vernia, TX, 78121. Phone: (830) 779-3200. Providers update this record themselves, so call before visiting.
How can I verify Derek W. Guillory, M.D.'s license?
NPPES lists Texas license number L5751, 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 Derek W. Guillory, M.D. prescribe under Medicare Part D?
In 2024, Derek W. Guillory, M.D. had 37 Medicare Part D claims for 18 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.