John M. Mackay, M.D.
Emergency Medicine Physician · El Paso, TX
John M. Mackay, M.D. is an emergency medicine physician with a practice address in El Paso, Texas, and NPI 1851380810, issued on Oct 20, 2005. Check the license (Texas J4898, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John M. Mackay
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- J4898 TX
Self-reported in NPPES; status is on the state search - Practice location
- 4815 Alameda Ave, El Paso, TX 79905
- Phone
- (915) 521-7415
- Enumerated
- Oct 20, 2005
- Record last updated
- Nov 8, 2023
- Fax
- (915) 521-7920
- Medicaid ID
- 106012102 TX
- Medicare enrollment
- Enrolled (PECOS I20090226000647); accepts Medicare assignment
- Medical or professional school
- Medical College Of Ohio, 1984
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 4,885 in Texas → Look up another NPI →
Also registered at 4815 Alameda Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Carlos AlvarezTechnician/Technologist1962337154
Verify John M. Mackay in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical Board
Search for license J4898Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
34% more Medicare Part D claims than the average emergency medicine physician in 2024
303 Medicare Part D claims for 202 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 20 claims were for opioids.
Most prescribed
- Ondansetron Hcl26 claims
- Ibuprofen25 claims
- Tramadol Hcl15 claims
- Cephalexin14 claims
- Dexamethasone14 claims
- Nitrofurantoin Mono-Macro12 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
- Bluff Creek Emergency Medicine Associates, PAEl Paso, TX
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John M. Mackay among 4,885 emergency medicine physician records in Texas
John M. Mackay, 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 fileYes · 57% of these records are
- Graduated1984 · median 2013 among the 2,779 with a school on file
- Record last updated2023 · 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).
179 emergency medicine physician records list a practice address in El Paso
They are 179 of the 11,091 NPPES records with a practice address in El Paso, and 4,885 emergency medicine physician records in Texas.
All 4,885 in Texas → Every provider in El Paso → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Darryl Atkinson, D.O.El Paso, TX 799051366431421
- Stephen Borron, MDEl Paso, TX 799051396739173
- James Brown, M.D.El Paso, TX 799051689664682
- Earl Bryan, M.D.El Paso, TX 799051821088824
- Scott Greene, M.D.El Paso, TX 799051154310233
- Shawnna Kifer, MDEl Paso, TX 799051396762068
- Robert Kilgo, M.D.El Paso, TX 799051457340549
- Brian Nelson, M.D.El Paso, TX 799051073503942
Common questions
What is John M. Mackay, M.D.'s NPI number?
John M. Mackay, M.D.'s National Provider Identifier (NPI) is 1851380810, issued on Oct 20, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John M. Mackay, M.D. located?
The NPPES record lists a practice address at 4815 Alameda Ave, El Paso, TX, 79905. Phone: (915) 521-7415. Providers update this record themselves, so call before visiting.
How can I verify John M. Mackay, M.D.'s license?
NPPES lists Texas license number J4898, 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 M. Mackay, M.D. prescribe under Medicare Part D?
In 2024, John M. Mackay, M.D. had 303 Medicare Part D claims for 202 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.