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Orthopedic Surgery

Anthony Fiegen, MD

Works at hospitals in Sioux Falls, SD · Madison, SD · South Dakota

Summary

Dr. Anthony Fiegen, MD is an orthopedic surgeon at 715 S Main Ave, Oi Sioux Center, Sioux Center, IA 51250. Phone: (605) 331-5890. Accepts Medicare assignment. In 2024, Anthony Fiegen had 71 Original Medicare patients and 186 services. NPI 1659877736. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

From official Medicare data

This page shows what Medicare's official clinician data says about Anthony Fiegen, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Anthony Fiegen accept Medicare assignment?
Yes. Medicare's clinician data says Anthony Fiegen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Anthony Fiegen see?
In 2024, CMS data shows 71 Original Medicare patients and 186 services for Anthony Fiegen. This counts Original Medicare only and measures volume, not quality.
What is Anthony Fiegen's NPI number?
1659877736. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Anthony Fiegen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients71
Services billed to Medicare186
Different services or procedures39
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)24 services
  2. X-ray of shoulder, minimum of 2 views (73030)15 services
  3. X-ray of knee, 4 or more views (73564)15 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • Arthritis75%
  • High cholesterol68%
  • High blood pressure65%
  • Ischemic heart disease27%
  • Diabetes25%
  • Anxiety20%

Hospitals where Anthony Fiegen works

Medicare's Facility Affiliation Data lists Anthony Fiegen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

Practice locations

Addresses where Anthony Fiegen is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Anthony Fiegen as a member of this group (CMS data updated October 2, 2026).

  • Orthopedic Institute PC57 clinicians in the group

Specialties

Find other Orthopedic Surgery doctors in Iowa →

Other orthopedic surgeons in Iowa

Clinicians with the same Medicare primary specialty in Iowa — not a recommendation.

All orthopedic surgeons in Iowa →

Other clinicians in Orthopedic Institute PC

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Graduation year2018 (8 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1659877736
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians