NATHAN COLLIN FROEHNER CRNA
NPI 1699015164
Nurse Anesthetist, Certified Registered in Mason City, IA
About Nathan Collin Froehner Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHAN COLLIN FROEHNER CRNA (NPI 1699015164) is an individual nurse anesthetist, certified registered in Mason City, Iowa, licensed in Iowa (121445) and active in the NPI registry since February 2013. He is enrolled in Medicare PECOS, is affiliated with Mercyone North Iowa Medical Center, and is a graduate of Other (2012).
NPPES Registry Identity
Specialties & Licenses
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
Nathan Collin Froehner Crna 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
3Medicare enrollment records show Nathan Froehner reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Mason City, IA 50401
- Reassigned Medicare billing, Iowa enrollment
- 420 clinicians in this Medicare group
Hampton, IA 50441
- Reassigned Medicare billing, Iowa enrollment
- 27 clinicians in this Medicare group
Waverly, IA 50677
- Reassigned Medicare billing, Iowa enrollment
- 38 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 3
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercyone North Iowa Medical Center
Acute Care Hospitals · Mason City, IAWaverly Health Center
Critical Access Hospitals · Waverly, IAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 50401 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.
MASON CITY, IA 50401
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 Nathan Froehner's NPI number?
The NPI number for Nathan Froehner is 1699015164. It was assigned to this individual provider in the NPPES registry on February 21, 2013.
Where is Nathan Froehner located?
Nathan Froehner practices at 1000 4th St SW, Mason City, IA 50401. The listed phone number is (641) 428-7000.
What is Nathan Froehner's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Nathan Froehner enrolled in Medicare?
Yes. Nathan Froehner 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 Nathan Froehner's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Froehner reassigns Medicare benefits to 3 organizations: North Iowa Mercy Clinics (Mason City, IA), Franklin General Hospital (Hampton, IA) and Waverly Health Center (Waverly, IA). 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 Nathan Froehner's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nathan Froehner accept?
Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Nathan Froehner 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.
Is Nathan Froehner affiliated with any hospitals?
According to CMS data, Nathan Froehner is affiliated with Mercyone North Iowa Medical Center and Waverly Health Center.
When was this NPI record last updated?
The NPPES record for Nathan Froehner was last updated on February 21, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.
# Nathan Collin Froehner, CRNA · NPI 1699015164
Nurse Anesthetist, Certified Registered physician in Mason City, Iowa. Individual provider, active in the CMS NPPES registry since February 21, 2013.
## Identity
- **NPI:** 1699015164 (Entity type: Individual)
- **Enumerated:** February 21, 2013
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 121445 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 4TH ST SW, Mason City, IA 50401-2800
- **Phone:** (641) 428-7000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): North Iowa Mercy Clinics (NPI 1043321102, Mason City, IA); Franklin General Hospital (NPI 1477637759, Hampton, IA); Waverly Health Center (NPI 1033125463, Waverly, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2012
## Record status
- **NPPES last updated:** February 21, 2013
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Source: [NPI Profile](https://npiprofile.com/npi/1699015164) · Data from the CMS NPPES public registry.