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DR. TIMOTHY A. NYDAM M.D.
NPI 1972714533
Emergency Medicine in Sioux Falls, SD

Active since May 25, 2007PECOS Enrolled
900 E 54TH ST N STE 200, SIOUX FALLS, SD 57104(605) 328-9300 Get Directions Write a Review

NPPES record last updated: January 21, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 2, 2021, Oct 5, 2021, May 15, 2017 (3 updates tracked since 2017).

About Dr. Timothy A. Nydam M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. TIMOTHY A. NYDAM M.D. (NPI 1972714533) is an individual emergency medicine provider in Sioux Falls, South Dakota, licensed in South Dakota (10115) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS and maintains a secondary practice location in Fort Polk.

NPPES Registry Identity

NPI1972714533
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. TIMOTHY A. NYDAMCredential: M.D.
Location Address900 E 54TH ST N STE 200Sioux Falls, SD 57104-0686
Mailing AddressPo Box 5074Sioux Falls, SD 57117-5074
Phone(605) 328-9300
Sole ProprietorYes
Enumeration DateMay 25, 2007
Last NPPES UpdateJanuary 21, 20253 updates tracked since enumeration
NPPES CertifiedJanuary 21, 2025
✔ NPI 1972714533 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in SD · 10115✔ Licensed in KS · 04-37803
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
900 E 54TH ST N STE 200, Sioux Falls, SD 57104
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Secondary Practice Location 1

Location 11585 3rd StFort Polk, LA 71459-5102 · Phone (337) 531-3701

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Sanford Health Plan, Wellmark Health Plan of Iowa, Inc., Wellmark of South Dakota, Inc..Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Timothy A. Nydam M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Timothy Nydam reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sanford Clinic
Same address
Occupational Medicine
900 E 54TH ST N STE 200
Sioux Falls, SD 57104
  • Reassigned Medicare billing, South Dakota enrollment
  • 826 clinicians in this Medicare group
NPI 1053792465 (701) 323-8170
Avera Mckennan
3.2 mi
Internal Medicine
300 N DAKOTA AVE., STE. 117
Sioux Falls, SD 57104
  • Reassigned Medicare billing, South Dakota enrollment
  • 1,277 clinicians in this Medicare group
NPI 1083894067 (605) 322-6800

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 57104 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$85.21 typical visit price
range $55.52 – $167.23
Typical copayment $21.30 (range $13.88 – $41.80)
Most-billed visit code 99203
Established Patient
$97.88 typical visit price
range $18.08 – $137.08
Typical copayment $24.47 (range $4.52 – $34.27)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 11

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GARY STEVEN MARCKSTADT MD
Family Medicine
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 332-2883
SANFORD CLINIC
Preventive Medicine (Occupational Medicine)
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (701) 323-8170
GREGORY J HOYME P.T.
Physical Therapist
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9300
ALEESHA CLYDE OT
Occupational Therapist
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9318
KELLY J MARSHALL OT
Occupational Therapist
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9300
BARBARA SMYTHE PT
Physical Therapist
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9300
KARA JO DEJONG CNP
Nurse Practitioner
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9300
RACHEL E THIES MD
Preventive Medicine (Occupational Medicine)
900 E 54TH ST N STE 200
SIOUX FALLS, SD 57104
Minnehaha County (605) 328-9300

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 Timothy Nydam's NPI number?

The NPI number for Timothy Nydam is 1972714533. It was assigned to this individual provider in the NPPES registry on May 25, 2007.

Where is Timothy Nydam located?

Timothy Nydam practices at 900 E 54th St N Ste 200, Sioux Falls, SD 57104. The listed phone number is (605) 328-9300.

What is Timothy Nydam's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Timothy Nydam enrolled in Medicare?

Yes. Timothy Nydam is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Timothy Nydam's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Timothy Nydam reassigns Medicare benefits to 2 organizations: Sanford Clinic (Sioux Falls, SD) and Avera Mckennan (Sioux Falls, 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 Timothy Nydam's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Timothy Nydam accept?

Health plans from Sanford Health Plan, Wellmark Health Plan of Iowa, Inc. and Wellmark of South Dakota, Inc. list Timothy Nydam 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.

When was this NPI record last updated?

The NPPES record for Timothy Nydam was last updated on January 21, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 months 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.