Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Andrea L. Darilek, MD

Individual provider Internal Medicine Physician · NPI 1053334904

Andrea L. Darilek, MD is a Hospitalist in San Antonio, Texas. Graduated from University of Texas Medical School at Houston in 1997, 29 years ago. Practices with Billings Clinic, a 805-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Montana and Texas.

Years since qualifying
29
Trained at
University of Texas Medical School at Houston
Licensed in
MT, TX
In the registry since
2006
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

4502 Medical Dr
San Antonio, TX 78229-4402
Phone: (210) 358-4000
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 2800 10th Ave N, Billings, MT 59101-0703 — (406) 657-4000

Specialties & licences

Hospitalist Physician (primary) Taxonomy 208M00000X · Licence W1570 (TX)
Internal Medicine Physician Taxonomy 207R00000X · Licence W1570 (TX)
Hospitalist Physician Taxonomy 208M00000X · Licence 10896 (MT)

Record details

NPI number1053334904
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 25, 2006
Last updated in NPPESJanuary 27, 2026
Certification dateJanuary 27, 2026

Medicare enrollment

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

Medicare specialtyHOSPITALIST
Also practisesPEDIATRIC MEDICINE
Medical schoolUNIVERSITY OF TEXAS MEDICAL SCHOOL AT HOUSTON
Graduated 1997 (29 years in practice)
Group practice Billings Clinic — 805 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients134
Services billed 230 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 Billings Clinic

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 805 clinicians in the practice; 12 are shown here.

Other providers in San Antonio