John Ayers, MD
Emergency Medicine Physician · Houston, TX
John Ayers, MD is an emergency medicine physician with a practice address in Houston, Texas, and NPI 1770016073, issued on Apr 4, 2017. Check the license (Texas S1556, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Ayers
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- S1556 TX
Self-reported in NPPES; status is on the state search - Practice location
- 6431 Fannin St, Houston, TX 77030
- Phone
- (713) 500-7878
- Enumerated
- Apr 4, 2017
- Record last updated
- Mar 23, 2020 (not updated in 6 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 6431 Fannin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Ayers in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license S1556Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
40% fewer Medicare Part D claims than the average emergency medicine physician in 2024
136 Medicare Part D claims for 103 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Ondansetron Odt18 claims
- Amoxicillin-Clavulanate Potass16 claims
- Cephalexin11 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.
John Ayers among 4,885 emergency medicine physician records in Texas
John Ayers, MD 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 2017, is newer than 74% of them.
- NPI issued2017 · 74% of these records are older, 23% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 57% of these records are
- Record last updated2020 · 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).
818 emergency medicine physician records list a practice address in Houston
They are 818 of the 61,221 NPPES records with a practice address in Houston, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Houston → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Bentley Bobrow, M.D.Houston, TX 770301528040276
- Jack Butler, M.D.Houston, TX 770301962491035
- Pamela Carmain, M.D.Houston, TX 770301285636266
- Crystal Cassidy, M.D.Houston, TX 770301316948599
- Robert Dickson, MDHouston, TX 770301609866391
- Swapan Dubey, M.D.Houston, TX 770301497756175
- Bhushan Kukkalli, M.D.Houston, TX 770301871579276
- Kelly Larkin, M.D.Houston, TX 770301144205683
Common questions
What is John Ayers, MD's NPI number?
John Ayers, MD's National Provider Identifier (NPI) is 1770016073, issued on Apr 4, 2017. An NPI identifies a provider in billing; it is not a license.
Where is John Ayers, MD located?
The NPPES record lists a practice address at 6431 Fannin St, Houston, TX, 77030. Phone: (713) 500-7878. Providers update this record themselves, so call before visiting.
How can I verify John Ayers, MD's license?
NPPES lists Texas license number S1556, 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 John Ayers, MD prescribe under Medicare Part D?
In 2024, John Ayers, MD had 136 Medicare Part D claims for 103 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.