John Mastrovich, M.D.
Allergy & Immunology Physician · San Antonio, TX
John Mastrovich, M.D. is an allergy & immunology physician with a practice address in San Antonio, Texas, and NPI 1740205418, issued on Jul 13, 2006. Check the license on the Texas Medical Board; the Medicare figures below come from public CMS files.
- Name
- John Mastrovich
- Credential
- M.D.
- Primary taxonomy
- Allergy & Immunology Physician 207K00000X
- Practice location
- 20650 Stone Oak Pkwy, San Antonio, TX 78258
- Phone
- (210) 342-6200
- Enumerated
- Jul 13, 2006
- Entity
- Type 1 · individual
Verify John Mastrovich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersTexas Medical BoardCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
65% fewer Medicare Part D claims than the average allergy & immunology physician in 2024
275 Medicare Part D claims for 62 beneficiaries, against an average of 788 among the 2,397 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluticasone Propionate45 claims
- Albuterol Sulfate Hfa30 claims
- Trelegy Ellipta27 claims
- Montelukast Sodium25 claims
- Fluticasone-Salmeterol13 claims
- Wixela Inhub12 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.
Allergy & Immunology Physician providers in Texas
There are 274 allergy & immunology physician records in Texas.
Other allergy & immunology physician records in Texas
- Margaret Adair, M.D.Coppell, TX1487827820
- Fiona Adame, DOSan Antonio, TX1972168193
- Colleen Adkins, M.D.Austin, TX1689991879
- Tonia Afshan, MD, MPHAustin, TX1447744750
- Gary Albertson, DOAustin, TX1225063951
- Noel Ales, DOGarden Ridge, TX1538159975
- Shifaa Alkotob, MDHouston, TX1992324735
- Hande Alp, MDWebster, TX1023014693
- Nouf AlsaatiHouston, TX1225520612
- Michael Alvares, MDGarland, TX1306055264
Common questions
What is John Mastrovich, M.D.'s NPI number?
John Mastrovich, M.D.'s National Provider Identifier (NPI) is 1740205418, issued on Jul 13, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Mastrovich, M.D. located?
The NPPES record lists a practice address at 20650 Stone Oak Pkwy, San Antonio, TX, 78258. Phone: (210) 342-6200. Providers update this record themselves, so call before visiting.
How can I verify John Mastrovich, M.D.'s license?
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 Mastrovich, M.D. prescribe under Medicare Part D?
In 2024, John Mastrovich, M.D. had 275 Medicare Part D claims for 62 beneficiaries; the average among allergy & immunology physician prescribers was 788. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.