NPPES file of Aug 9, 2026

James L. Armstrong, NP

Nurse Practitioner · Prairie Du Sac, WI

James L. Armstrong, NP is a nurse practitioner with a practice address in Prairie Du Sac, Wisconsin, and NPI 1477518140, issued on Apr 18, 2006. Check the license (Wisconsin 2347, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1477518140
Name
James L. Armstrong
Credential
NP
Primary taxonomy
Nurse Practitioner 363L00000X
License numbers
2347 WI
123191 WI
Self-reported in NPPES; status is on the state search
Practice location
260 26TH St, Prairie Du Sac, WI 53578
Phone
(608) 643-2471
Enumerated
Apr 18, 2006
Record last updated
Mar 24, 2021 (not updated in 5 years: call before relying on the address or phone)
Fax
(608) 643-4788
Medicaid ID
41190000 WI
Medicare enrollment
Enrolled (PECOS I20040813000346); accepts Medicare assignment
Medical or professional school
University Of Wisconsin School Of Medicine, 2003
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 260 26TH St

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

  1. Jessica Armbruster, APSWSocial Worker1730595075
  2. Teresa Bare-InmanPhysical Therapy Assistant1780249243
  3. Laura Bixby, APNPFamily Nurse Practitioner1508520123
  4. Kelsey Brady, MSW, LCSWClinical Social Worker1902390768
  5. Sandra Carroll, CRNACertified Registered Nurse Anesthetist1952086944
  6. Alicia Castillo, FNPFamily Nurse Practitioner1720446248

Verify James L. Armstrong in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
    Search for license 2347    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 Wisconsin 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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51% fewer Medicare Part D claims than the average nurse practitioner in 2024

541 Medicare Part D claims for 303 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. 278 claims were for opioids.

  1. James Armstrong541
  2. Specialty average1,109

Most prescribed

  1. Hydrocodone-Acetaminophen173 claims
  2. Amoxicillin136 claims
  3. Tramadol Hcl61 claims
  4. Diclofenac Sodium52 claims
  5. Oxycodone Hcl43 claims
  6. Clindamycin Hcl34 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Sauk Prairie Healthcare IncPrairie Du Sac, WI

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

8 nurse practitioner records list a practice address in Prairie Du Sac

They are 8 of the 156 NPPES records with a practice address in Prairie Du Sac, and 3,995 nurse practitioner records in Wisconsin.

All 8 in Prairie Du Sac → All 3,995 in Wisconsin → Every provider in Prairie Du Sac →

Other nurse practitioner records in Wisconsin

  1. Caroline Aaberg, APNPMadison, WI1881384394
  2. Joyce Abbott, APNPOshkosh, WI1003824665
  3. Mohamed Abdelazim, APNPAppleton, WI1760266696
  4. Jacklyn Abel, AGACNP-BCMauston, WI1104631506
  5. Henrietta Abili, APNPGermantown, WI1174859524
  6. Jade Abts, NPGreen Bay, WI1992293708
  7. Karalyn Adam, DNP, RNMarshfield, WI1780933051
  8. Carol Adamczyk, MSNWauwatosa, WI1457502395
  9. Amanda Adams, NPMadison, WI1023366598
  10. Bernadette Adams, FNPWestby, WI1427047620

Common questions

What is James L. Armstrong, NP's NPI number?

James L. Armstrong, NP's National Provider Identifier (NPI) is 1477518140, issued on Apr 18, 2006. An NPI identifies a provider in billing; it is not a license.

Where is James L. Armstrong, NP located?

The NPPES record lists a practice address at 260 26TH St, Prairie Du Sac, WI, 53578. Phone: (608) 643-2471. Providers update this record themselves, so call before visiting.

How can I verify James L. Armstrong, NP's license?

NPPES lists Wisconsin license number 2347, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.

How much does James L. Armstrong, NP prescribe under Medicare Part D?

In 2024, James L. Armstrong, NP had 541 Medicare Part D claims for 303 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions 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. Medicare files from data.cms.gov. 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.