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

Individual provider Internal Medicine Physician · NPI 1619357191

Mathew Boyd Day, MD practises Internal Medicine in Grand Island, Nebraska. Graduated from University of Nebraska College of Medicine in 2015, 11 years ago. Practices with CHI Health Clinic Specialty LLC, a 312-clinician group and accepts Medicare assignment. Licensed in Nebraska.

Years since qualifying
11
Trained at
University of Nebraska College of Medicine
Licensed in
NE
In the registry since
2015
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

729 N Custer Ave
Grand Island, NE 68803-4311
Phone: (308) 382-9266
Fax: (308) 382-5290
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 30968 (NE)

Record details

NPI number1619357191
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 1, 2015
Last updated in NPPESJanuary 29, 2019

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF NEBRASKA COLLEGE OF MEDICINE
Graduated 2015 (11 years in practice)
Group practice Chi Health Clinic Specialty Llc — 312 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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 patients196
Services billed 623 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

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.

  • Chi Health St. Francis Hospital · Grand Island, NE · listed as Saint Francis Medical Center
  • Portneuf Medical Center Hospital · Pocatello, ID
  • Chi Health Good Samaritan Hospital · Kearney, NE
  • Valley County Health System Hospital · Ord, NE
  • York General Health Care Services Hospital · York, NE

Colleagues at CHI Health Clinic Specialty LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 312 clinicians in the practice; 12 are shown here.

Other providers in Grand Island