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

Mr. Lars E Peterson, MD

Individual provider Internal Medicine Physician · NPI 1023110640

Mr. Lars E Peterson, MD practises Internal Medicine in Laramie, Wyoming. Graduated from Creighton University School of Medicine in 2000, 26 years ago. Practices with Ivinson Memorial Hospital, a 60-clinician group and accepts Medicare assignment. Licensed in Wyoming.

Years since qualifying
26
Trained at
Creighton University School of Medicine
Licensed in
WY
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

255 N 30th St
Laramie, WY 82072-5140 Not confirmed with CMS for 13 years — call before visiting
Phone: (307) 742-2141
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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 6962A (WY)

Record details

NPI number1023110640
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 3, 2006
Last updated in NPPESOctober 31, 2012

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolCREIGHTON UNIVERSITY SCHOOL OF MEDICINE
Graduated 2000 (26 years in practice)
Group practice Ivinson Memorial Hospital — 60 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 patients479
Services billed 825 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 Ivinson Memorial Hospital

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 60 clinicians in the practice; 12 are shown here.

Other providers in Laramie