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

Frederick Johnson, MD

Individual provider Emergency Medicine Physician · NPI 1891780029

Frederick Johnson, MD practises Emergency Medicine in Rock Springs, Wyoming. Graduated from Northwestern University Feinberg Medical School in 1976, 50 years ago. Practices with Sunset Emergency Physicians LLC, a 16-clinician group and accepts Medicare assignment. Licensed in Indiana.

Years since qualifying
50
Trained at
Northwestern University Feinberg Medical School
Licensed in
IN
In the registry since
2005
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

1200 College Dr
Rock Springs, WY 82901-5868 Not confirmed with CMS for 18 years — call before visiting
Phone: (307) 352-8350
Fax: (307) 352-8178
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 01028913 (IN)

Record details

NPI number1891780029
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 14, 2005
Last updated in NPPESMay 7, 2008

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolNORTHWESTERN UNIVERSITY FEINBERG MEDICAL SCHOOL
Graduated 1976 (50 years in practice)
Group practice Sunset Emergency Physicians Llc — 16 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 patients218
Services billed 275 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. Those with a page here are linked.

  • La Paz Regional Hospital Hospital · Parker, AZ · listed as La Paz Regional Hospital Inc
  • Exceptional Community Hospital Bullhead City Hospital · Bullhead City, AZ

Colleagues at Sunset Emergency Physicians LLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 16 clinicians in the practice; 12 are shown here.

Other providers in Rock Springs