KARI J WILLIAMS NP
NPI 1245254093
Nurse Practitioner in Phoenix, AZ
About Kari J Williams Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KARI J WILLIAMS NP (NPI 1245254093) is an individual nurse practitioner in Phoenix, Arizona, licensed in Arizona (AP2257) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS and is a graduate of Other (2005).
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
Kari J Williams Np 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 Kari Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Scottsdale, AZ 85259
- Reassigned Medicare billing, Arizona enrollment
- 1,792 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 6
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 85054 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.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Kari Williams's NPI number?
The NPI number for Kari Williams is 1245254093. It was assigned to this individual provider in the NPPES registry on July 26, 2006.
Where is Kari Williams located?
Kari Williams practices at 5777 E Mayo Blvd, Phoenix, AZ 85054. The listed phone number is (480) 301-8000.
What is Kari Williams's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Kari Williams enrolled in Medicare?
Yes. Kari Williams 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 Kari Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Kari Williams reassigns Medicare benefits to Mayo Clinic Arizona (Scottsdale, AZ). 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 Kari Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Kari Williams was last updated on October 6, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# Kari J Williams, NP · NPI 1245254093
Nurse Practitioner physician in Phoenix, Arizona. Individual provider, active in the CMS NPPES registry since July 26, 2006.
## Identity
- **NPI:** 1245254093 (Entity type: Individual)
- **Enumerated:** July 26, 2006
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** AP2257 (Arizona)
- **Sole proprietor:** No
## Practice location
- **Address:** 5777 E MAYO BLVD, Phoenix, AZ 85054-4502
- **Phone:** (480) 301-8000
## 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:** Mayo Clinic Arizona (NPI 1558332494, Scottsdale, AZ), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2005
## Record status
- **NPPES last updated:** October 6, 2020
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Source: [NPI Profile](https://npiprofile.com/npi/1245254093) · Data from the CMS NPPES public registry.