DR. MARAH JO VAN DIEST MD
NPI 1952930273
Family Medicine in Sioux Falls, SD
About Dr. Marah Jo Van Diest Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARAH JO VAN DIEST MD (NPI 1952930273) is an individual family medicine provider in Sioux Falls, South Dakota, licensed in South Dakota (14570) and active in the NPI registry since April 2020. She is enrolled in Medicare PECOS, is affiliated with Avera Mckennan Hospital & University Health Center, and is a graduate of Saint Louis University School Of Medicine (2020).
NPPES Registry Identity
Specialties & Licenses
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. Marah Jo Van Diest 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 Reassignment
Medicare enrollment records show Marah Van Diest reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Sioux Falls, SD 57110
- Reassigned Medicare billing, South Dakota enrollment
- 1,277 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 2
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Avera Mckennan Hospital & University Health Center
Acute Care Hospitals · Sioux Falls, SDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 57110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SIOUX FALLS, SD 57110
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 Marah Van Diest's NPI number?
The NPI number for Marah Van Diest is 1952930273. It was assigned to this individual provider in the NPPES registry on April 7, 2020.
Where is Marah Van Diest located?
Marah Van Diest practices at 1600 S Highline Ave, Sioux Falls, SD 57110. The listed phone number is (605) 504-5600.
What is Marah Van Diest's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Marah Van Diest enrolled in Medicare?
Yes. Marah Van Diest 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 Marah Van Diest's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marah Van Diest reassigns Medicare benefits to Avera Mckennan (Sioux Falls, SD). 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 Marah Van Diest's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marah Van Diest accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Sunflower Health Plan, Avera Health Plans and Wellmark Health Plan of Iowa, Inc. and 1 other insurer list Marah Van Diest 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 Marah Van Diest affiliated with any hospitals?
According to CMS data, Marah Van Diest is affiliated with Avera Mckennan Hospital & University Health Center.
When was this NPI record last updated?
The NPPES record for Marah Van Diest was last updated on August 18, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Dr. Marah Jo Van Diest, MD · NPI 1952930273
Family Medicine physician in Sioux Falls, South Dakota. Individual provider, active in the CMS NPPES registry since April 7, 2020.
## Identity
- **NPI:** 1952930273 (Entity type: Individual)
- **Enumerated:** April 7, 2020
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 14570 (South Dakota)
- **Sole proprietor:** No
## Practice location
- **Address:** 1600 S HIGHLINE AVE, Sioux Falls, SD 57110-1007
- **Phone:** (605) 504-5600
## 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:** Avera Mckennan (NPI 1396711016, Sioux Falls, SD), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Saint Louis University School Of Medicine, class of 2020
## Record status
- **NPPES last updated:** August 18, 2023
---
Source: [NPI Profile](https://npiprofile.com/npi/1952930273) · Data from the CMS NPPES public registry.