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

Isaac Lill

Individual provider Internal Medicine Physician · NPI 1003558495

Isaac Lill is an Internal Medicine in Waco, Texas. Graduated from University of Texas Southwestern Medical School at Dallas in 2022, 4 years ago. Practices with Hillcrest Physician Services, a 113-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
4
Trained at
University of Texas Southwestern Medical School at Dallas
Licensed in
TX
In the registry since
2022
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Practice location Address checks out

100 Hillcrest Medical Blvd
Waco, TX 76712-8897
Phone: (254) 202-2000
Fax: (254) 202-5651
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1 Baylor Plz, Houston, TX 77030-3498 — (713) 798-4951

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence V6348 (TX)

Record details

NPI number1003558495
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorNo
NPI enumeratedApril 7, 2022
Last updated in NPPESOctober 1, 2025
Certification dateOctober 1, 2025
Mailing addressPo Box 848491, Dallas, TX 75284-8491

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS
Graduated 2022 (4 years in practice)
Group practice Hillcrest Physician Services — 113 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Other providers in Waco