NPPES file of Aug 9, 2026

Wendy Lynn Chapin, ARNP

Family Nurse Practitioner · Waterloo, IA

Wendy Lynn Chapin, ARNP is a family nurse practitioner with a practice address in Waterloo, Iowa, and NPI 1740616739, issued on Sep 23, 2013. Check the license (Iowa A105053, as entered in NPPES) with the Iowa 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1740616739
Name
Wendy Lynn Chapin
Credential
ARNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
A105053 IA
Self-reported in NPPES; status is on the state search
Practice location
3812 Pheasant LN, Waterloo, IA 50701
Phone
(319) 236-3444
Enumerated
Sep 23, 2013
Record last updated
Jul 19, 2022
Fax
(319) 236-0257
Medicare enrollment
Enrolled (PECOS I20131126001066); 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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Also registered at 3812 Pheasant LN

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

  1. Angela Buttjer, PA CPhysician Assistant1831153626
  2. Annette Geary, FNP-BCNurse Practitioner1952362683
  3. Rhian Gronewold, ARNP-BCFamily Nurse Practitioner1912374141
  4. Bryan Sands, DODermatology Physician1770548570

Verify Wendy Lynn Chapin in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Iowa board licenses this profession
    Search for license A105053
    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 Iowa 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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38% fewer Medicare Part D claims than the average family nurse practitioner in 2024

811 Medicare Part D claims for 355 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 5% of claims.

  1. Wendy Chapin811
  2. Specialty average1,305

Most prescribed

  1. Ketoconazole136 claims
  2. Triamcinolone Acetonide106 claims
  3. Cephalexin53 claims
  4. Clobetasol Propionate52 claims
  5. Fluocinonide45 claims
  6. Clindamycin Phosphate40 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.

The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score100.0
  2. Costnot scored (reweighted)
  3. Promoting interoperabilitynot scored (reweighted)
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $51.10

3 payments; by number, the most common kind was food and beverage; the largest payer was Ucb, Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Wendy Chapin$51.10
  2. Specialty average$650.95

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Bills Medicare through one group practice

  1. Dermatology Associates PCWaterloo, IA

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

Wendy Lynn Chapin among 1,971 family nurse practitioner records in Iowa

Wendy Lynn Chapin, ARNP is one of 1,971 family nurse practitioner records with a practice address in Iowa. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 23% of them.

  • NPI issued2013 · 23% of these records are older, 74% newer
  • In a Medicare fileYes · 84% of these records are
  • In the CMS Doctors and Clinicians fileYes · 71% of these records are
  • Graduated2013 · median 2018 among the 1,398 with a school on file
  • Record last updated2022 · 43% 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 Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

66 family nurse practitioner records list a practice address in Waterloo

They are 66 of the 1,512 NPPES records with a practice address in Waterloo, and 1,971 family nurse practitioner records in Iowa.

The 8 family nurse practitioner records with the nearest ZIP codes

  1. Katie Bries, ARNPWaterloo, IA 507011427490226
  2. Maryjane Cose, ARNPWaterloo, IA 507011235677691
  3. Alena Ellerbroek, MSN,FNPWaterloo, IA 507011376858654
  4. Rhian Gronewold, ARNP-BCWaterloo, IA 507011912374141
  5. Jeffrey GuseWaterloo, IA 507011063827798
  6. Michaela Johnson, ARNPWaterloo, IA 507011407312549
  7. Kayley Lawrence, ARNPWaterloo, IA 507011154911865
  8. Maria Metcalf, ARNPWaterloo, IA 507011972822393

Common questions

What is Wendy Lynn Chapin, ARNP's NPI number?

Wendy Lynn Chapin, ARNP's National Provider Identifier (NPI) is 1740616739, issued on Sep 23, 2013. An NPI identifies a provider in billing; it is not a license.

Where is Wendy Lynn Chapin, ARNP located?

The NPPES record lists a practice address at 3812 Pheasant LN, Waterloo, IA, 50701. Phone: (319) 236-3444. Providers update this record themselves, so call before visiting.

How can I verify Wendy Lynn Chapin, ARNP's license?

NPPES lists Iowa license number A105053, as entered by the provider. Search the Iowa board that licenses this profession; the NPPES record confirms identity only.

How much does Wendy Lynn Chapin, ARNP prescribe under Medicare Part D?

In 2024, Wendy Lynn Chapin, ARNP had 811 Medicare Part D claims for 355 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.

What is Wendy Lynn Chapin, ARNP's MIPS final score?

The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.

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.