FREDERICK JOHNSON MD
NPI 1891780029
Emergency Medicine in Rock Springs, WY
About Frederick Johnson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FREDERICK JOHNSON MD (NPI 1891780029) is an individual emergency medicine provider in Rock Springs, Wyoming, licensed in Indiana (01028913) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS and is a graduate of Northwestern University Feinberg Medical School (1976).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 8
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Frederick Johnson Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
7Medicare enrollment records show Frederick Johnson reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Prescott, AZ 86301
- Reassigned Medicare billing, Arizona enrollment
- 123 clinicians in this Medicare group
Bullhead City, AZ 86442
- Reassigned Medicare billing, Arizona enrollment
- 147 clinicians in this Medicare group
Parker, AZ 85344
- Reassigned Medicare billing, Arizona enrollment
- 21 clinicians in this Medicare group
Gilbert, AZ 85296
- Reassigned Medicare billing, Arizona enrollment
- 263 clinicians in this Medicare group
Maricopa, AZ 85139
- Reassigned Medicare billing, Arizona enrollment
- 159 clinicians in this Medicare group
Eloy, AZ 85131
- Reassigned Medicare billing, Arizona enrollment
- 70 clinicians in this Medicare group
Yuma, AZ 85365
- Reassigned Medicare billing, Arizona enrollment
- 147 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 82901 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ROCK SPRINGS, WY 82901
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Frederick Johnson's NPI number?
The NPI number for Frederick Johnson is 1891780029. It was assigned to this individual provider in the NPPES registry on September 14, 2005.
Where is Frederick Johnson located?
Frederick Johnson practices at 1200 College Dr, Rock Springs, WY 82901. The listed phone number is (307) 352-8350.
What is Frederick Johnson's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Frederick Johnson enrolled in Medicare?
Yes. Frederick Johnson is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Frederick Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Frederick Johnson reassigns Medicare benefits to 7 organizations: Exceptional Physicians Group Prescott Hospital PLLC (Prescott, AZ), Exceptional Physicians Group Bullhead City Hospital PLLC (Bullhead City, AZ), Sunset Emergency Physicians LLC (Parker, AZ), Tec Emergency Physicians Of Arizona, LLC (Gilbert, AZ), Exceptional Physicians Group Arizona PLLC (Maricopa, AZ) and 2 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Frederick Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Frederick Johnson accept?
Health plans from Blue Cross Blue Shield of Arizona, Cigna HealthCare of Arizona, Inc and Oscar Health Plan, Inc. list Frederick Johnson as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
When was this NPI record last updated?
The NPPES record for Frederick Johnson was last updated on May 7, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Frederick Johnson, MD · NPI 1891780029
Emergency Medicine physician in Rock Springs, Wyoming. Individual provider, active in the CMS NPPES registry since September 14, 2005.
## Identity
- **NPI:** 1891780029 (Entity type: Individual)
- **Enumerated:** September 14, 2005
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 01028913 (Indiana)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1200 COLLEGE DR, Rock Springs, WY 82901-5868
- **Phone:** (307) 352-8350 · **Fax:** (307) 352-8178
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): Exceptional Physicians Group Prescott Hospital PLLC (NPI 1720807670, Prescott, AZ); Exceptional Physicians Group Bullhead City Hospital PLLC (NPI 1518732023, Bullhead City, AZ); Sunset Emergency Physicians LLC (NPI 1871504860, Parker, AZ); Tec Emergency Physicians Of Arizona, LLC (NPI 1245772870, Gilbert, AZ); Exceptional Physicians Group Arizona PLLC (NPI 1447910229, Maricopa, AZ); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Northwestern University Feinberg Medical School, class of 1976
## Record status
- **NPPES last updated:** May 7, 2008
- **Other identifiers:** Medicare PIN W21000 (WY); Medicaid 100345950 (IN); Other 314470 (WY); and 5 more
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Source: [NPI Profile](https://npiprofile.com/npi/1891780029) · Data from the CMS NPPES public registry.