NPPES file of Aug 9, 2026

Isaac Lill

Internal Medicine Physician · Waco, TX

Isaac Lill is an internal medicine physician with a practice address in Waco, Texas, and NPI 1003558495, issued on Apr 7, 2022. Check the license (Texas V6348, as entered in NPPES) on the Texas Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1003558495
Name
Isaac Lill
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
V6348 TX
Self-reported in NPPES; status is on the state search
Practice location
100 Hillcrest Medical Blvd, Waco, TX 76712
Phone
(254) 202-2000
Enumerated
Apr 7, 2022
Record last updated
Oct 1, 2025
Fax
(254) 202-5651
Medicare enrollment
Enrolled (PECOS I20250916002904); accepts Medicare assignment
Medical or professional school
University Of Texas Southwestern Medical School At Dallas, 2022
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest internal medicine physician records → All 9,175 in Texas → Look up another NPI →

Also registered at 100 Hillcrest Medical Blvd

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Cynthia AdamsCertified Registered Nurse Anesthetist1891932984
  2. Ronald AdcockCertified Registered Nurse Anesthetist1881708105
  3. Randolph Aguayo, APRN ACNPC-AGAcute Care Nurse Practitioner1174343685
  4. Miguel AguirreAnesthesiologist Assistant1215170584
  5. Jazbeen Ahmad, M.D.Internal Medicine Physician1740579903
  6. David Alexander, M.D.Surgery Physician1598745705

Verify Isaac Lill in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersTexas Medical Board
    Search for license V6348    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Texas license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Hillcrest Physician ServicesWaco, TX

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Isaac Lill among 9,175 internal medicine physician records in Texas

Isaac Lill is one of 9,175 internal medicine physician records with a practice address in Texas. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2022, is newer than 91% of them.

  • NPI issued2022 · 91% of these records are older, 5% newer
  • In a Medicare fileYes · 82% of these records are
  • In the CMS Doctors and Clinicians fileYes · 66% of these records are
  • Graduated2022 · median 2004 among the 6,088 with a school on file
  • Record last updated2025 · 49% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

41 internal medicine physician records list a practice address in Waco

They are 41 of the 3,295 NPPES records with a practice address in Waco, and 9,175 internal medicine physician records in Texas.

All 9,175 in Texas → Every provider in Waco → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Gary Barbin, MDWaco, TX 767121568436780
  2. James Copeland, MDWaco, TX 767121174597348
  3. Roger Cowart, MDWaco, TX 767121750391546
  4. Joe Cunningham, M. D.Waco, TX 767121639395676
  5. Steven Elwell, MDWaco, TX 767121336112556
  6. James Hodges, MDWaco, TX 767121962441600
  7. Twiladawn Lovett, M.D.Waco, TX 767121649296161
  8. Vikas Patel, M.D.Waco, TX 767121083634356

Common questions

What is Isaac Lill's NPI number?

Isaac Lill's National Provider Identifier (NPI) is 1003558495, issued on Apr 7, 2022. An NPI identifies a provider in billing; it is not a license.

Where is Isaac Lill located?

The NPPES record lists a practice address at 100 Hillcrest Medical Blvd, Waco, TX, 76712. Phone: (254) 202-2000. Providers update this record themselves, so call before visiting.

How can I verify Isaac Lill's license?

NPPES lists Texas license number V6348, as entered by the provider. 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.