NPPES file of Aug 9, 2026

Isaac J. Hoffmaster, RD

Registered Dietitian · Prairie Du Sac, WI

Isaac J. Hoffmaster, RD is a registered dietitian with a practice address in Prairie Du Sac, Wisconsin, and NPI 1568988376, issued on Aug 15, 2017. Check the license (Wisconsin 86021879, as entered in NPPES) with the Wisconsin 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
1568988376
Name
Isaac J. Hoffmaster
Credential
RD
Primary taxonomy
Registered Dietitian 133V00000X
License number
86021879 WI
Self-reported in NPPES; status is on the state search
Practice location
260 26TH St, Prairie Du Sac, WI 53578
Phone
(608) 643-7529
Enumerated
Aug 15, 2017
Record last updated
Aug 15, 2017 (not updated in 9 years: call before relying on the address or phone)
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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8 nearest registered dietitian records → All 1,457 in Wisconsin → Look up another NPI →

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. James Armstrong, NPNurse Practitioner1477518140
  3. Teresa Bare-InmanPhysical Therapy Assistant1780249243
  4. Laura Bixby, APNPFamily Nurse Practitioner1508520123
  5. Kelsey Brady, MSW, LCSWClinical Social Worker1902390768
  6. Sandra Carroll, CRNACertified Registered Nurse Anesthetist1952086944

Verify Isaac J. Hoffmaster 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 86021879    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

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Isaac J. Hoffmaster among 1,457 registered dietitian records in Wisconsin

Isaac J. Hoffmaster, RD is one of 1,457 registered dietitian records with a practice address in Wisconsin. 12% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2017, is newer than 54% of them.

  • NPI issued2017 · 54% of these records are older, 42% newer
  • In a Medicare fileNo · 12% of these records are
  • In the CMS Doctors and Clinicians fileNo · 13% of these records are
  • Record last updated2017 · 63% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 133V00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Registered Dietitian providers in Wisconsin

There are 1,457 registered dietitian records in Wisconsin. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 1,457 in Wisconsin → Every provider in Prairie Du Sac → Registered Dietitian nationwide →

The 8 registered dietitian records with the nearest ZIP codes

  1. Amy MillerPrairie Du Sac, WI 535781982842993
  2. Mary Jo ColemanRichland Center, WI 535811326199985
  3. Grace DenmanRichland Center, WI 535811386287951
  4. Julie EsserRichland Center, WI 535811891184180
  5. Kelly Herbert, RDNRichland Center, WI 535811730893249
  6. Ty MulhollandRichland Center, WI 535811003967654
  7. Carly Duerst, RDNew Glarus, WI 535741194336669
  8. Joellen Neefe, RDSauk City, WI 535831871732057

Common questions

What is Isaac J. Hoffmaster, RD's NPI number?

Isaac J. Hoffmaster, RD's National Provider Identifier (NPI) is 1568988376, issued on Aug 15, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Isaac J. Hoffmaster, RD located?

The NPPES record lists a practice address at 260 26TH St, Prairie Du Sac, WI, 53578. Phone: (608) 643-7529. Providers update this record themselves, so call before visiting.

How can I verify Isaac J. Hoffmaster, RD's license?

NPPES lists Wisconsin license number 86021879, as entered by the provider. Search the Wisconsin 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.