Mercedes Dayan
Emergency Medicine Physician · Austin, TX
Mercedes Dayan is an emergency medicine physician with a practice address in Austin, Texas, and NPI 1902593437, issued on Apr 24, 2023. Check the license (Texas W0555, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mercedes Dayan
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- W0555 TX
BP10083799 TX
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Red River St FL 2, Austin, TX 78701
- Phone
- (512) 495-5555
- Enumerated
- Apr 24, 2023
- Record last updated
- Dec 4, 2025
- Medicare enrollment
- Enrolled (PECOS I20251229000982); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Verify Mercedes Dayan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license W0555Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average emergency medicine physician in 2024
15 Medicare Part D claims, 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.
Industry payments in 2024: $14.98
1 payment: food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 12,335 providers of this specialty with any payment received $953.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Mercedes Dayan among 4,885 emergency medicine physician records in Texas
Mercedes Dayan 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 2023, is newer than 96% of them.
- NPI issued2023 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2023 · 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).
Emergency Medicine Physician providers in Texas
There are 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in Austin → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Milton Anderson, M.D.Austin, TX 787011912962713
- John Cottey, M.D.Austin, TX 787011194780130
- Patrick Crocker, D.O.Austin, TX 787011184689077
- Megan Hood, MDAustin, TX 787011588638050
- Keith Hurst, D.O.Austin, TX 787011275598393
- James Kempema, M.D.Austin, TX 787011235194077
- William Lindsey, M.D.Austin, TX 787011396700332
- Sharon Long, M.D.Austin, TX 787011720042930
Common questions
What is Mercedes Dayan's NPI number?
Mercedes Dayan's National Provider Identifier (NPI) is 1902593437, issued on Apr 24, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Mercedes Dayan located?
The NPPES record lists a practice address at 1500 Red River St FL 2, Austin, TX, 78701. Phone: (512) 495-5555. Providers update this record themselves, so call before visiting.
How can I verify Mercedes Dayan's license?
NPPES lists Texas license number W0555, 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 Mercedes Dayan prescribe under Medicare Part D?
In 2024, Mercedes Dayan had 15 Medicare Part D claims; 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.