Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Greg A. Lillvis, AA

Individual provider Anesthesiologist Assistant · NPI 1184915894

Greg A. Lillvis, AA is an Anesthesiology Assistant in Columbus, Ohio. Qualified in 2011, 15 years ago. Practices with Osu Observation Medicine, LLC, a 419-clinician group and accepts Medicare assignment. Licensed in Ohio.

Years since qualifying
15
Licensed in
OH
In the registry since
2011
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Practice location Address checks out

410 W 10th Ave Fl 1
Columbus, OH 43210-1240
Phone: (614) 293-8487
Fax: (614) 293-8153
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiologist Assistant (primary) Taxonomy 367H00000X · Licence 67.000181 (OH)

Record details

NPI number1184915894
Entity typeIndividual (Type 1)
GenderMale
Credentials AA
Sole proprietorNo
NPI enumeratedApril 28, 2011
Last updated in NPPESJuly 14, 2025
Certification dateJuly 14, 2025

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY ASSISTANT
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Osu Observation Medicine, Llc — 419 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 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 patients104
Services billed 105 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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. Those with a page here are linked.

Also affiliated with 1 hospital, which CMS identifies by certification number only.

Colleagues at Osu Observation Medicine, LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 419 clinicians in the practice; 12 are shown here.

Other providers in Columbus