Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1003558495 Individual Practitioner Male Practitioner

Isaac Lill

Internal Medicine • Waco, TX

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Isaac Lill is a certified Internal Medicine practicing in Waco, TX. With approximately 4 years of clinical experience since graduating from University Of Texas Southwestern Medical School At Dallas in 2022, Isaac Lill delivers high-quality medical care to the local community at 100 HILLCREST MEDICAL BLVD.

Isaac Lill is affiliated with Hillcrest Physician Services and accepts Medicare assignment.

Practice Location & Contact Primary Location

Practice Address

100 Hillcrest Medical Blvd

Waco, TX 767128897

Telephone 2542022000
Fax 2542025651
Associated Practice Facility / Clinic
🏢 Waco Neonatal Group, P.a. Facility NPI 1265530604

Medicare Profile & Education

Medical School

University Of Texas Southwestern Medical School At Dallas

Graduation Year

2022

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Waco, TX

Rising Specialist (<5 Yrs)
Practitioner Clinical Experience
4 Yrs -15.7 yrs vs City Avg
City Avg: 19.7 Yrs
State Avg: 26.2 Yrs
Regional Practice Density
45 Specialists

Practicing in Waco, TX (9538 Statewide)

Telehealth Adoption Rate
6.7% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Lill (4 Years) 4 Yrs
Waco Specialty Average (19.7 Years) 19.7 Yrs

Medical Specialties & State Licenses

CMS Verified: 2025-10-01
Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License TX V6348

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Hospital & Practice Group Affiliations

Hillcrest Physician Services

50 Hillcrest Medical Blvd, Waco, TX 767128954

Phone: 2542027950

Hillcrest Physician Services

140 Hillcrest Medical Blvd, Waco, TX 767128897

Hillcrest Physician Services

100 Hillcrest Med Blvde, Waco, TX 767128897

Phone: 2542022000

Hillcrest Physician Services

50 Hillcrest Medical Blvd, Waco, TX 767128955

Secondary Practice Locations

1 Baylor Plz

Houston, TX 770303498

Phone: 7137984951

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Lori Hutson , RNC NNP

Nurse Practitioner - Neonatal

NPI 1003879651

RNCNNP

Emily Heeringa , FNP

Nurse Practitioner - Family

NPI 1013485945

Family Nurse Practitioner

Samuel Kelly

Anesthesiologist Assistant

NPI 1013542372
Dr. David Jansma , MD

Radiology - Diagnostic Radiology

NPI 1013941665

Doctor of Medicine (M.D.)

NPI 1033127758

Doctor of Medicine (M.D.)

Dr. Aman Shah , MD

Family Medicine

NPI 1033132758

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

9 Historical Events
🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) October 01, 2025

Internal Medicine (License #V6348 in TX)

📍
Updated Practice Location September 02, 2025

Registered at 100 HILLCREST MEDICAL BLVD, WACO, TX 767128897 (Tel: 2542022000)

📍
Updated Business Mailing Address September 02, 2025

Registered at PO BOX 848491, DALLAS, TX 752848491 (Tel: 2542029330)

NPI Profile Active April 07, 2022

NPI status registered as active in NPPES database

📍
Updated Practice Location April 07, 2022

Registered at 1 BAYLOR PLZ, HOUSTON, TX 770303498 (Tel: 7137984951)

📍
Updated Business Mailing Address April 07, 2022

Registered at 6401 MAPLE AVE APT 8102, DALLAS, TX 752355525 (Tel: 5127400124)

👤
Provider Name / Credentials Updated April 07, 2022

Recorded as ISAAC LILL

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) April 07, 2022

Student in an Organized Health Care Education/Training Program

🟢
Initial NPI Registration & Enumeration April 07, 2022

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews
No patient reviews submitted yet for Isaac Lill. Be the first to share your experience!

Sign in to leave a review for Isaac Lill

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1003558495
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: April 07, 2022
Last Update: October 01, 2025
Sole Proprietor: No

Mailing Address

Po Box 848491

Dallas, TX 752848491

Phone: 2542029330

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.