Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Greg Wayne Galler, MD

Individual provider Internal Medicine Physician · NPI 1548356827

Dr. Greg Wayne Galler, MD practises Gastroenterology in Houston, Texas. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 1986, 40 years ago. Practices with Kelsey-Seybold Medical Group, PLLC, a 942-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
40
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
TX
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2727 W Holcombe Blvd 3rd Fl
Houston, TX 77025-1669
Phone: (713) 442-0000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1111 Augusta Dr, Houston, TX 77057-2209 — (713) 442-2400

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence J6111 (TX)
Internal Medicine Physician Taxonomy 207R00000X · Licence J6111 (TX)

Record details

NPI number1548356827
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 5, 2006
Last updated in NPPESApril 22, 2020
Certification dateApril 22, 2020

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 1986 (40 years in practice)
Group practice Kelsey-Seybold Medical Group, Pllc — 942 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Colonoscopy 1–10 times
Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients21
Services billed 44 a service is one billed item, such as a visit, a test or a procedure
Average patient age71

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.

Colleagues at Kelsey-Seybold Medical Group, PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 942 clinicians in the practice; 12 are shown here.

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