Crystal Sommerfeld, APNP
Family Nurse Practitioner · Appleton, WI
Crystal Sommerfeld, APNP is a family nurse practitioner with a practice address in Appleton, Wisconsin, and NPI 1083490239, issued on Sep 5, 2023. Check the license (Wisconsin 1414633, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Crystal Sommerfeld
- Credential
- APNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 1414633 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3925 N Gateway Dr, Appleton, WI 54913
- Phone
- (920) 702-6371
- Enumerated
- Sep 5, 2023
- Record last updated
- Nov 9, 2023
- Medicare enrollment
- Enrolled (PECOS I20231120002968); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Also registered at 3925 N Gateway Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Daisy Boehm, N.P.Family Nurse Practitioner1194925479
- Renee BrucknerFamily Nurse Practitioner1295614022
Verify Crystal Sommerfeld in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 1414633Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average family nurse practitioner in 2024
212 Medicare Part D claims for 129 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone14 claims
- Doxycycline Hyclate11 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.
Bills Medicare through one group practice
- Thedacare, IncorporatedAppleton, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Crystal Sommerfeld among 2,814 family nurse practitioner records in Wisconsin
Crystal Sommerfeld, APNP is one of 2,814 family nurse practitioner records with a practice address in Wisconsin. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 78% of them.
- NPI issued2023 · 78% of these records are older, 15% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2023 · median 2019 among the 1,740 with a school on file
- Record last updated2023 · 42% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
148 family nurse practitioner records list a practice address in Appleton
They are 148 of the 3,249 NPPES records with a practice address in Appleton, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Appleton → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Michelle Becker, APNPAppleton, WI 549131699184580
- Daisy Boehm, N.P.Appleton, WI 549131194925479
- Krista Cornelius, APNPAppleton, WI 549131619082021
- Kristin Day, NPAppleton, WI 549131497787014
- Shanna Dierker, FNP-BCAppleton, WI 549131558728337
- Kathleen ErdahlAppleton, WI 549131043748189
- Jenifer Grooms, CRNP, APRNAppleton, WI 549131104178896
- Nancy Gudex, NPAppleton, WI 549131316072226
Common questions
What is Crystal Sommerfeld, APNP's NPI number?
Crystal Sommerfeld, APNP's National Provider Identifier (NPI) is 1083490239, issued on Sep 5, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Crystal Sommerfeld, APNP located?
The NPPES record lists a practice address at 3925 N Gateway Dr, Appleton, WI, 54913. Phone: (920) 702-6371. Providers update this record themselves, so call before visiting.
How can I verify Crystal Sommerfeld, APNP's license?
NPPES lists Wisconsin license number 1414633, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Crystal Sommerfeld, APNP prescribe under Medicare Part D?
In 2024, Crystal Sommerfeld, APNP had 212 Medicare Part D claims for 129 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions 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.
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.