Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Omar Ayala, MD

Individual provider Internal Medicine Physician · NPI 1972786176

Omar Ayala, MD practises Internal Medicine in San Angelo, Texas. Qualified in 1999, 27 years ago. Practices with Shannon Clinic, a 547-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
27
Licensed in
TX
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

120 E Harris Ave
San Angelo, TX 76903-5904 Not confirmed with CMS for 13 years — call before visiting
Phone: (325) 653-6741
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence N4925 (TX)

Record details

NPI number1972786176
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 11, 2007
Last updated in NPPESJune 11, 2013

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Shannon Clinic — 547 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients226
Services billed 244 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Shannon Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 547 clinicians in the practice; 12 are shown here.

Other providers in San Angelo