AARON D BUCK CRNA
NPI 1891201547
Nurse Anesthetist, Certified Registered in Marshfield, WI
About Aaron D Buck Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AARON D BUCK CRNA (NPI 1891201547) is an individual nurse anesthetist, certified registered in Marshfield, Wisconsin, licensed in Wisconsin (1035533) and active in the NPI registry since December 2017. He is affiliated with Plains Regional Medical Center and is a graduate of Other (2018).
NPPES Registry Identity
Specialties & Licenses 3
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
Aaron D Buck 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
2Medicare enrollment records show Aaron Buck reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Clovis, NM 88101
- Reassigned Medicare billing, New Mexico enrollment
- 14 clinicians in this Medicare group
Albuquerque, NM 87102
- Reassigned Medicare billing, New Mexico enrollment
- 383 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.
Plains Regional Medical Center
Acute Care Hospitals · Clovis, NMRoosevelt General Hospital
Acute Care Hospitals · Portales, NMPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54449 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.
MARSHFIELD, WI 54449
MARSHFIELD, WI 54449
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 Aaron Buck's NPI number?
The NPI number for Aaron Buck is 1891201547. It was assigned to this individual provider in the NPPES registry on December 18, 2017.
Where is Aaron Buck located?
Aaron Buck practices at 1000 N Oak Ave, Marshfield, WI 54449. The listed phone number is (715) 387-5511.
What is Aaron Buck's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Aaron Buck enrolled in Medicare?
Yes. Aaron Buck 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 Aaron Buck's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Buck reassigns Medicare benefits to 2 organizations: Sleepy Plains Anesthesia LLC (Clovis, NM) and Main Street Anesthesia Of New Mexico, LLC (Albuquerque, NM). 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 Aaron Buck's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Aaron Buck affiliated with any hospitals?
According to CMS data, Aaron Buck is affiliated with Plains Regional Medical Center and Roosevelt General Hospital.
When was this NPI record last updated?
The NPPES record for Aaron Buck was last updated on March 19, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Aaron D Buck, CRNA · NPI 1891201547
Nurse Anesthetist, Certified Registered physician in Marshfield, Wisconsin. Individual provider, active in the CMS NPPES registry since December 18, 2017.
## Identity
- **NPI:** 1891201547 (Entity type: Individual)
- **Enumerated:** December 18, 2017
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 1035533 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 N OAK AVE, Marshfield, WI 54449-5703
- **Phone:** (715) 387-5511 · **Fax:** (715) 387-5240
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Sleepy Plains Anesthesia LLC (NPI 1265090344, Clovis, NM); Main Street Anesthesia Of New Mexico, LLC (NPI 1275010985, Albuquerque, NM) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2018
## Record status
- **NPPES last updated:** March 19, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1891201547) · Data from the CMS NPPES public registry.