WILLIAM F WALTZ MD
NPI 1649226986
Pediatrics - Pediatric Cardiology in Sioux Falls, SD
About William F Waltz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM F WALTZ MD (NPI 1649226986) is an individual pediatric cardiology provider in Sioux Falls, South Dakota, licensed in South Dakota (4079) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Sanford Usd Medical Center, and is a graduate of University Of Minnesota Medical School (1993).
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
William F Waltz Md 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 William Waltz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sioux Falls, SD 57105
- Reassigned Medicare billing, South Dakota enrollment
- 826 clinicians in this Medicare group
Sioux Falls, SD 57105
- Reassigned Medicare billing, South Dakota enrollment
- 1,097 clinicians in this Medicare group
Canton, SD 57013
- Reassigned Medicare billing, South Dakota enrollment
- 422 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.
Sanford Usd Medical Center
Acute Care Hospitals · Sioux Falls, SDMedicare 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SIOUX FALLS, SD 57105
SIOUX FALLS, SD 57105
SIOUX FALLS, SD 57105
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 Waltz's NPI number?
The NPI number for William Waltz is 1649226986. It was assigned to this individual provider in the NPPES registry on May 26, 2006.
Where is William Waltz located?
William Waltz practices at 1600 W 22nd St, Sioux Falls, SD 57105. The listed phone number is (605) 312-1000.
What is William Waltz's specialty?
The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Cardiology, with taxonomy code 2080P0202X.
Is William Waltz enrolled in Medicare?
Yes. William Waltz 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 William Waltz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Waltz reassigns Medicare benefits to 3 organizations: Sanford Clinic (Sioux Falls, SD), Sanford Medical Center (Sioux Falls, SD) and Sanford Health Network (Canton, SD). 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 William Waltz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Waltz accept?
Health plans from Blue Cross Blue Shield of North Dakota, Oscar Insurance Company, Sanford Health Plan, Security Health Plan and Wellmark Health Plan of Iowa, Inc. and 1 other insurer list William Waltz 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 Waltz affiliated with any hospitals?
According to CMS data, William Waltz is affiliated with Sanford Usd Medical Center.
When was this NPI record last updated?
The NPPES record for William Waltz was last updated on March 31, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# William F Waltz, MD · NPI 1649226986
Pediatric Cardiology physician in Sioux Falls, South Dakota. Individual provider, active in the CMS NPPES registry since May 26, 2006.
## Identity
- **NPI:** 1649226986 (Entity type: Individual)
- **Enumerated:** May 26, 2006
- **Primary specialty:** Pediatrics - Pediatric Cardiology · taxonomy 2080P0202X
- **State license:** 4079 (South Dakota)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 W 22ND ST, Sioux Falls, SD 57105-1521
- **Phone:** (605) 312-1000 · **Fax:** (605) 312-1001
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Sanford Clinic (NPI 1881610889, Sioux Falls, SD); Sanford Medical Center (NPI 1093090342, Sioux Falls, SD); Sanford Health Network (NPI 1033140454, Canton, SD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Minnesota Medical School, class of 1993
## Record status
- **NPPES last updated:** March 31, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1649226986) · Data from the CMS NPPES public registry.