AARON ZONDLO
NPI 1023416559
Nurse Anesthetist, Certified Registered in Wausau, WI
About Aaron Zondlo NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AARON ZONDLO (NPI 1023416559) is an individual nurse anesthetist, certified registered in Wausau, Wisconsin, licensed in Wisconsin (161835-30) and active in the NPI registry since December 2014. He is enrolled in Medicare PECOS, is affiliated with Aspirus Wausau Hospital, and is a graduate of Other (2014).
NPPES Registry Identity
Specialties & Licenses
Group Practice 1
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 Zondlo 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 Aaron Zondlo reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wausau, WI 54401
- Reassigned Medicare billing, Wisconsin enrollment
- 53 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.
Aspirus Wausau Hospital
Acute Care Hospitals · Wausau, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 54401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WAUSAU, WI 54401
WAUSAU, WI 54401
WAUSAU, WI 54401
WAUSAU, WI 54401
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 Zondlo's NPI number?
The NPI number for Aaron Zondlo is 1023416559. It was assigned to this individual provider in the NPPES registry on December 16, 2014.
Where is Aaron Zondlo located?
Aaron Zondlo practices at 425 Pine Ridge Blvd Ste 211, Wausau, WI 54401. The listed phone number is (715) 845-5505.
What is Aaron Zondlo's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is Aaron Zondlo enrolled in Medicare?
Yes. Aaron Zondlo 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 Aaron Zondlo's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Zondlo reassigns Medicare benefits to Central Wisconsin Anesthesiology (Wausau, WI). 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 Aaron Zondlo's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Aaron Zondlo affiliated with any hospitals?
According to CMS data, Aaron Zondlo is affiliated with Aspirus Wausau Hospital.
When was this NPI record last updated?
The NPPES record for Aaron Zondlo was last updated on January 25, 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 Zondlo · NPI 1023416559
Nurse Anesthetist, Certified Registered physician in Wausau, Wisconsin. Individual provider, active in the CMS NPPES registry since December 16, 2014.
## Identity
- **NPI:** 1023416559 (Entity type: Individual)
- **Enumerated:** December 16, 2014
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** 161835-30 (Wisconsin)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 425 PINE RIDGE BLVD STE 211, Wausau, WI 54401-4123
- **Phone:** (715) 845-5505 · **Fax:** (715) 848-2884
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging
- **Bills Medicare through:** Central Wisconsin Anesthesiology (NPI 1518999648, Wausau, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** January 25, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1023416559) · Data from the CMS NPPES public registry.