NPPES file of Aug 9, 2026

Kristen Klett Tosaw, FNP-C

Nurse Practitioner · Barrington, IL

Kristen Klett Tosaw, FNP-C is a nurse practitioner with a practice address in Barrington, Illinois, and NPI 1174917769, issued on Mar 23, 2015. Check the license (Illinois 209012615, as entered in NPPES) with the Illinois 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
1174917769
Name
Kristen Klett Tosaw
Credential
FNP-C
Primary taxonomy
Nurse Practitioner 363L00000X
License number
209012615 IL
Self-reported in NPPES; status is on the state search
Practice location
405 Lake Zurich RD, Barrington, IL 60010
Phone
(844) 656-8763
Enumerated
Mar 23, 2015
Record last updated
Jun 27, 2024
Fax
(847) 381-5607
Medicare enrollment
Enrolled (PECOS I20150526000609); 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.
Download card Updates feed

8 nearest nurse practitioner records → All 4,892 in Illinois → Look up another NPI →

Also registered at 405 Lake Zurich RD

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

  1. Susan Bartsch, APN-BCAdult Health Nurse Practitioner1427357268
  2. Paula Beltran, APNPFamily Nurse Practitioner1972050623
  3. Kevin CayananFamily Nurse Practitioner1316409386
  4. Robin Daniell, LCSWClinical Social Worker1134441629
  5. Hanneli Fanega, APN, CNSAdult Health Clinical Nurse Specialist1295193860
  6. Stephani FigueroaFamily Nurse Practitioner1376007393

Verify Kristen Klett Tosaw in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Illinois board licenses this profession
    Search for license 209012615    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 Illinois 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.

Is this page about you? You can ask us to correct, restrict or remove it: how.

Bills Medicare through one group practice

  1. Hpa Medical Management LLCBarrington, IL

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

Kristen Klett Tosaw among 4,892 nurse practitioner records in Illinois

Kristen Klett Tosaw, FNP-C is one of 4,892 nurse practitioner records with a practice address in Illinois. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 31% of them.

  • NPI issued2015 · 31% of these records are older, 64% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated2015 · median 2018 among the 3,389 with a school on file
  • Record last updated2024 · 36% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

18 nurse practitioner records list a practice address in Barrington

They are 18 of the 756 NPPES records with a practice address in Barrington, and 4,892 nurse practitioner records in Illinois.

All 4,892 in Illinois → Every provider in Barrington → Nurse Practitioner nationwide →

The 8 nurse practitioner records with the nearest ZIP codes

  1. Nicole Brady, NPBarrington, IL 600101598788705
  2. Teresa Godfrey, RN, BS, MS, FNPBarrington, IL 600101316371776
  3. Rebecca Guio, APNBarrington, IL 600101528343811
  4. Bridgett Hallstrom, NPBarrington, IL 600101578649950
  5. Lisa Jackson, N.P.Lake Barrington, IL 600101316980766
  6. Rumyana Krouleva, APNLake Barrington, IL 600101295274165
  7. Janet Lenz, APNBarrington, IL 600101619297934
  8. Brenna MolikBarrington, IL 600101487167698

Common questions

What is Kristen Klett Tosaw, FNP-C's NPI number?

Kristen Klett Tosaw, FNP-C's National Provider Identifier (NPI) is 1174917769, issued on Mar 23, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Kristen Klett Tosaw, FNP-C located?

The NPPES record lists a practice address at 405 Lake Zurich RD, Barrington, IL, 60010. Phone: (844) 656-8763. Providers update this record themselves, so call before visiting.

How can I verify Kristen Klett Tosaw, FNP-C's license?

NPPES lists Illinois license number 209012615, as entered by the provider. Search the Illinois 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.