NPPES file of Aug 9, 2026

Christiaan Letsinger, FNP-C

Family Nurse Practitioner · Belvidere, IL

Christiaan Letsinger, FNP-C is a family nurse practitioner with a practice address in Belvidere, Illinois, and NPI 1407657026, issued on Mar 20, 2025. Check the license (Illinois 209.031976, 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
1407657026
Name
Christiaan Letsinger
Credential
FNP-C
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
209.031976 IL
Self-reported in NPPES; status is on the state search
Practice location
1700 Henry Luckow LN, Belvidere, IL 61008
Phone
(779) 696-8650
Enumerated
Mar 20, 2025
Record last updated
Mar 20, 2025
Medicare enrollment
Enrolled (PECOS I20250605000757); 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 family nurse practitioner records → All 7,639 in Illinois → Look up another NPI →

Also registered at 1700 Henry Luckow LN

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

  1. Cassandra Alcock, APNFamily Nurse Practitioner1073021762
  2. Amanda Bush, M.D.Gynecology Physician1093950941
  3. Amanda Castellanos, FNP-BCFamily Nurse Practitioner1841083342
  4. Michael Corcoran, D.P.M.Foot & Ankle Surgery Podiatrist1528374196
  5. Anne CunninghamFamily Nurse Practitioner1184151177
  6. Andrea Giamalva, MDFamily Medicine Physician1104146539

Verify Christiaan Letsinger 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 209.031976    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.

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Bills Medicare through one group practice

  1. Swedishamerican HospitalBelvidere, IL

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

Christiaan Letsinger among 7,639 family nurse practitioner records in Illinois

Christiaan Letsinger, FNP-C is one of 7,639 family nurse practitioner records with a practice address in Illinois. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2025, is newer than 91% of them.

  • NPI issued2025 · 91% of these records are older, 3% newer
  • In a Medicare fileYes · 78% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated2024 · median 2018 among the 4,778 with a school on file
  • Record last updated2025 · 39% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

17 family nurse practitioner records list a practice address in Belvidere

They are 17 of the 194 NPPES records with a practice address in Belvidere, and 7,639 family nurse practitioner records in Illinois.

All 7,639 in Illinois → Every provider in Belvidere → Family Nurse Practitioner nationwide →

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Cassandra Alcock, APNBelvidere, IL 610081073021762
  2. Julie Bredlau, APNBelvidere, IL 610081033666920
  3. Gail Brick, ANPBelvidere, IL 610081679724561
  4. Anne CunninghamBelvidere, IL 610081184151177
  5. Jody Gosnell, APNBelvidere, IL 610081235687989
  6. Elizabeth Gray, DNPBelvidere, IL 610081922882562
  7. Erica Hoyer, APNBelvidere, IL 610081104259894
  8. Megan Johnson, NPBelvidere, IL 610081760730576

Common questions

What is Christiaan Letsinger, FNP-C's NPI number?

Christiaan Letsinger, FNP-C's National Provider Identifier (NPI) is 1407657026, issued on Mar 20, 2025. An NPI identifies a provider in billing; it is not a license.

Where is Christiaan Letsinger, FNP-C located?

The NPPES record lists a practice address at 1700 Henry Luckow LN, Belvidere, IL, 61008. Phone: (779) 696-8650. Providers update this record themselves, so call before visiting.

How can I verify Christiaan Letsinger, FNP-C's license?

NPPES lists Illinois license number 209.031976, 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.