DR. WILLIAM BRETT GUTHMILLER DO
NPI 1427626662
Anesthesiology in Omaha, NE
About Dr. William Brett Guthmiller Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM BRETT GUTHMILLER DO (NPI 1427626662) is an individual anesthesiology provider in Omaha, Nebraska, licensed in Nebraska (TEP9275) and active in the NPI registry since June 2021. He is enrolled in Medicare PECOS, is affiliated with Orange City Area Health System, and is a graduate of University Of Nebraska College Of Medicine (2025).
NPPES Registry Identity
Specialties & Licenses 2
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
Dr. William Brett Guthmiller Do 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 Reassignment
Medicare enrollment records show William Guthmiller reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Orange City, IA 51041
- Reassigned Medicare billing, Iowa enrollment
- Also billed through NPI 1003886367 (Iowa)
- 45 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Orange City Area Health System
Critical Access Hospitals · Orange City, IAOther Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OMAHA, NE 68198
OMAHA, NE 68198
OMAHA, NE 68198
OMAHA, NE 68198
OMAHA, NE 68198
OMAHA, NE 68198
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 William Guthmiller's NPI number?
The NPI number for William Guthmiller is 1427626662. It was assigned to this individual provider in the NPPES registry on June 14, 2021.
Where is William Guthmiller located?
William Guthmiller practices at 42nd And Emile, Omaha, NE 68198. The listed phone number is (402) 559-4000.
What is William Guthmiller's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is William Guthmiller enrolled in Medicare?
Yes. William Guthmiller 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 organization bills Medicare for William Guthmiller's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Guthmiller reassigns Medicare benefits to Orange City Municipal Hospital (Orange City, IA). The 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 William Guthmiller's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Guthmiller accept?
Health plans from Avera Health Plans, Sanford Health Plan and Wellmark Health Plan of Iowa, Inc. list William Guthmiller 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 William Guthmiller affiliated with any hospitals?
According to CMS data, William Guthmiller is affiliated with Orange City Area Health System.
When was this NPI record last updated?
The NPPES record for William Guthmiller was last updated on January 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.
# Dr. William Brett Guthmiller, DO · NPI 1427626662
Anesthesiology physician in Omaha, Nebraska. Individual provider, active in the CMS NPPES registry since June 14, 2021.
## Identity
- **NPI:** 1427626662 (Entity type: Individual)
- **Enumerated:** June 14, 2021
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** TEP9275 (Nebraska)
- **Sole proprietor:** No
## Practice location
- **Address:** 42ND AND EMILE, Omaha, NE 68198-3203
- **Phone:** (402) 559-4000
## 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:** Orange City Municipal Hospital (NPI 1265479323, Orange City, IA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Nebraska College Of Medicine, class of 2025
## Record status
- **NPPES last updated:** January 23, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1427626662) · Data from the CMS NPPES public registry.