NPPES file of Aug 9, 2026

Katrina Williams, CRNS

Certified Registered Nurse Anesthetist · Madison, WI

Katrina Williams, CRNS is a certified registered nurse anesthetist with a practice address in Madison, Wisconsin, and NPI 1558838383, issued on Oct 30, 2018. Check the license (Wisconsin 230126-30, 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 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1558838383
Name
Katrina Williams
Credential
CRNS
Primary taxonomy
Certified Registered Nurse Anesthetist 367500000X
License number
230126-30 WI
Self-reported in NPPES; status is on the state search
Practice location
600 Highland Ave, Madison, WI 53792
Phone
(608) 263-6400
Enumerated
Oct 30, 2018
Record last updated
Jul 2, 2019 (not updated in 7 years: call before relying on the address or phone)
Medicare enrollment
Enrolled (PECOS I20190205002045); accepts Medicare assignment
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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8 nearest certified registered nurse anesthetist records → All 1,241 in Wisconsin → Look up another NPI →

Also registered at 600 Highland Ave

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

  1. Michael AabergSurgery Physician1346991064
  2. Carrah Aadrik, CRNACertified Registered Nurse Anesthetist1326423286
  3. Daniel Abbott, MDSurgical Oncology Physician1750412615
  4. Alaa Abd-ElsayedPain Medicine Physician1194967703
  5. Safiyya Abdulkadir, MDRheumatology Physician1093455826
  6. Edwin Abel, M.D.Urology Physician1083800510

Verify Katrina Williams 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 230126-30    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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Bills Medicare through one group practice

  1. University OF Wisconsin Medical Foundation IncMadison, WI

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

Katrina Williams among 1,241 certified registered nurse anesthetist records in Wisconsin

Katrina Williams, CRNS is one of 1,241 certified registered nurse anesthetist records with a practice address in Wisconsin. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 72% of them.

  • NPI issued2018 · 72% of these records are older, 24% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileYes · 75% of these records are
  • Graduated2018 · median 2013 among the 932 with a school on file
  • Record last updated2019 · 48% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 367500000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Certified Registered Nurse Anesthetist providers in Wisconsin

There are 1,241 certified registered nurse anesthetist records in Wisconsin.

All 1,241 in Wisconsin → Every provider in Madison → Certified Registered Nurse Anesthetist nationwide →

The 8 certified registered nurse anesthetist records with the nearest ZIP codes

  1. Kathleen Cooper, CRNAMadison, WI 537921992771943
  2. Cynthia Davis, CRNAMadison, WI 537921114993243
  3. Curtis Detro, CRNAMadison, WI 537921548237779
  4. Kathryn Fahrenkrug, CRNAMadison, WI 537921194791590
  5. Angela Ferguson, CRNAMadison, WI 537921467417782
  6. Trecia Gulseth, CRNAMadison, WI 537921164496683
  7. Nancy Gustafson, CRNAMadison, WI 537921700852753
  8. Doug Haley, CRNAMadison, WI 537921063488013

Common questions

What is Katrina Williams, CRNS's NPI number?

Katrina Williams, CRNS's National Provider Identifier (NPI) is 1558838383, issued on Oct 30, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Katrina Williams, CRNS located?

The NPPES record lists a practice address at 600 Highland Ave, Madison, WI, 53792. Phone: (608) 263-6400. Providers update this record themselves, so call before visiting.

How can I verify Katrina Williams, CRNS's license?

NPPES lists Wisconsin license number 230126-30, 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. 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.