NPPES file of Aug 9, 2026

Madelyn Koistinen

Registered Nurse · Watertown, SD

Madelyn Koistinen is a registered nurse with a practice address in Watertown, South Dakota, and NPI 1629894118, issued on Nov 29, 2024. Check the license (South Dakota R054703, as entered in NPPES) with the South Dakota board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1629894118
Name
Madelyn Koistinen
Primary taxonomy
Registered Nurse 163W00000X
License number
R054703 SD
Self-reported in NPPES; status is on the state search
Practice location
401 9TH Ave NW, Watertown, SD 57201
Phone
(605) 882-7000
Enumerated
Nov 29, 2024
Record last updated
Nov 29, 2024
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 401 9TH Ave NW

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Ghaith Aboud, M.DInternal Medicine Physician1497117618
  2. Ferdinand Addo, MDHematology & Oncology Physician1760461388
  3. Christopher Adducci, MDUrology Physician1598709750
  4. Kayla Aman, RD, LNRegistered Dietitian1891007837
  5. Bipinkumar Amin, MDHematology & Oncology Physician1568415628
  6. Hamid Assadi, MDFamily Medicine Physician1841671872

Verify Madelyn Koistinen in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich South Dakota board licenses this profession
    Search for license R054703    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the South Dakota license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Registered Nurse providers in South Dakota

There are 799 registered nurse records in South Dakota. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 799 in South Dakota → Every provider in Watertown →

Other registered nurse records in South Dakota

  1. Bjarne Aanning, BSNSioux Falls, SD1477364164
  2. Helen AbernathyFt Thompson, SD1407244312
  3. Carrie AddengastSioux Falls, SD1831999705
  4. Kristin Aeilts, RNSioux Falls, SD1578363461
  5. Delores Aguilar, RNEagle Butte, SD1437379658
  6. Leslie Ahlm, REGISTERED NURSERosebud, SD1184860116
  7. Tia Akers, REGISTERED NURSEPine Ridge, SD1770937559
  8. April Aldrich, RNFort Meade, SD1427849132
  9. Katelyn Allison, RNFort Meade, SD1336930049
  10. Rebecca AlthoffFort Meade, SD1922992676

Common questions

What is Madelyn Koistinen's NPI number?

Madelyn Koistinen's National Provider Identifier (NPI) is 1629894118, issued on Nov 29, 2024. An NPI identifies a provider in billing; it is not a license.

Where is Madelyn Koistinen located?

The NPPES record lists a practice address at 401 9TH Ave NW, Watertown, SD, 57201. Phone: (605) 882-7000. Providers update this record themselves, so call before visiting.

How can I verify Madelyn Koistinen's license?

NPPES lists South Dakota license number R054703, as entered by the provider. Search the South Dakota board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.