Tiffany Dawn Riordan, M.D.
Emergency Medicine Physician · Brenham, TX
Tiffany Dawn Riordan, M.D. is an emergency medicine physician with a practice address in Brenham, Texas, and NPI 1457396087, issued on Jun 18, 2006. Check the license (Texas M8955, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Tiffany Dawn Riordan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- M8955 TX
Self-reported in NPPES; status is on the state search - Practice location
- 700 Medical Pkwy, Brenham, TX 77833
- Phone
- (800) 994-0371
- Enumerated
- Jun 18, 2006
- Record last updated
- Sep 5, 2025
- Fax
- (254) 215-9722
- Medicaid ID
- 101648686 PA
- Medicare enrollment
- Enrolled (PECOS I20080604000503); accepts Medicare assignment
- Medical or professional school
- Texas A & M University System, Hsc, College Of Medicine, 2002
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 700 Medical Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mahmud Ali, M.D.Anesthesiology Physician1063416402
- Matthew Boutte, PA-C, MPASPhysician Assistant1457589558
- Robert Cochran, M.D.Emergency Medicine Physician1841210721
- Robert Coghlan, NPAcute Care Nurse Practitioner1255520698
- Dustin Corgan, M.D.Emergency Medicine Physician1821383316
- Joseph Degioanni, M.D.Emergency Medicine Physician1851311724
Verify Tiffany Dawn Riordan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license M8955Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% more Medicare Part D claims than the average emergency medicine physician in 2024
357 Medicare Part D claims for 282 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Ondansetron Odt43 claims
- Cephalexin36 claims
- Prednisone24 claims
- Doxycycline Monohydrate23 claims
- Acetaminophen-Codeine17 claims
- Clindamycin Hcl15 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
- Century Integrated Partners, IncBrenham, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Tiffany Dawn Riordan among 4,885 emergency medicine physician records in Texas
Tiffany Dawn Riordan, 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 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 67% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2002 · median 2013 among the 2,779 with a school on file
- Record last updated2025 · 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).
6 emergency medicine physician records list a practice address in Brenham
They are 6 of the 305 NPPES records with a practice address in Brenham, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Brenham → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Robert Cochran, M.D.Brenham, TX 778331841210721
- Dustin Corgan, M.D.Brenham, TX 778331821383316
- Joseph Degioanni, M.D.Brenham, TX 778331851311724
- John McDonnold, D.O.Brenham, TX 778331578742649
- Chance Sims, D.O.Brenham, TX 778331447666979
- Joseph Jones, M.D.Caldwell, TX 778361225066541
- Joseph Piper, D.O.Caldwell, TX 778361902816952
- Tazeen AbbasCollege Station, TX 778401700346962
Common questions
What is Tiffany Dawn Riordan, M.D.'s NPI number?
Tiffany Dawn Riordan, M.D.'s National Provider Identifier (NPI) is 1457396087, issued on Jun 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Tiffany Dawn Riordan, M.D. located?
The NPPES record lists a practice address at 700 Medical Pkwy, Brenham, TX, 77833. Phone: (800) 994-0371. Providers update this record themselves, so call before visiting.
How can I verify Tiffany Dawn Riordan, M.D.'s license?
NPPES lists Texas license number M8955, 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 Tiffany Dawn Riordan, M.D. prescribe under Medicare Part D?
In 2024, Tiffany Dawn Riordan, M.D. had 357 Medicare Part D claims for 282 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.