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

Dr. Peter Donald Maher IV, MD

Individual provider Gastroenterology Physician · NPI 1689857310

Dr. Peter Donald Maher IV, MD practises Gastroenterology in Richland, Washington. Graduated from George Washington University School of Medicine in 1986, 40 years ago. Practices with Kadlec Regional Medical Center, a 396-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Washington.

Years since qualifying
40
Trained at
George Washington University School of Medicine
Licensed in
WA
In the registry since
2007
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

1270 Lee Blvd
Richland, WA 99352-4231
Phone: (509) 942-3180
Fax: (509) 943-9722
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 602 N Colorado St, Kennewick, WA 99336-7825 — (509) 735-8600

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence MD00035465 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence MD00035465 (WA)

Record details

NPI number1689857310
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 17, 2007
Last updated in NPPESJune 15, 2023
Certification dateJune 15, 2023

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolGEORGE WASHINGTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 1986 (40 years in practice)
Group practice Kadlec Regional Medical Center — 396 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 160 times · 90th percentile
Upper gastrointestinal (GI) endoscopy for acid reflux 155 times · 86th 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 patients436
Services billed 657 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Kadlec Regional Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 396 clinicians in the practice; 12 are shown here.

Other providers in Richland