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

Michael V Koss, MD

Individual provider Gastroenterology Physician · NPI 1053365742

Michael V Koss, MD practises Gastroenterology in Sun City West, Arizona. Graduated from Rutgers New Jersey Medical School in 1995, 31 years ago. Practices with Banner Physician Specialists Arizona LLC, a 372-clinician group and accepts Medicare assignment. Licensed in Arizona.

Years since qualifying
31
Trained at
Rutgers New Jersey Medical School
Licensed in
AZ
In the registry since
2006
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

14416 W Meeker Blvd Bldg C
Sun City West, AZ 85375-5284 Not confirmed with CMS for 18 years — call before visiting
Phone: (623) 583-5273
Fax: (623) 583-5117
Show map & directions

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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 29368 (AZ)

Record details

NPI number1053365742
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 19, 2006
Last updated in NPPESJanuary 23, 2008

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolRUTGERS NEW JERSEY MEDICAL SCHOOL
Graduated 1995 (31 years in practice)
Group practice Banner Physician Specialists Arizona Llc — 372 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

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 226 times · 95th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 180 times · 88th percentile

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 patients706
Services billed 1,305 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Colleagues at Banner Physician Specialists Arizona LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 372 clinicians in the practice; 12 are shown here.