Genna N. Tonstad, APNP
Nurse Practitioner · Madison, WI
Genna N. Tonstad, APNP is a nurse practitioner with a practice address in Madison, Wisconsin, and NPI 1386421279, issued on Sep 13, 2023. Check the license (Wisconsin 14046, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Genna N. Tonstad
- Credential
- APNP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 14046 WI
Self-reported in NPPES; status is on the state search - Practice location
- 4781 Hayes RD Ste 101, Madison, WI 53704
- Phone
- (888) 938-3838
- Enumerated
- Sep 13, 2023
- Record last updated
- Aug 14, 2024
- Fax
- (888) 919-1083
- Medicare enrollment
- Enrolled (PECOS I20231020000866); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 3,995 in Wisconsin → Look up another NPI →
Also registered at 4781 Hayes RD Ste 101
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allison Philipps, APNPNurse Practitioner1437114774
Verify Genna N. Tonstad in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 14046Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average nurse practitioner in 2024
1,735 Medicare Part D claims for 117 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 49 claims were for opioids.
Most prescribed
- Furosemide73 claims
- Amlodipine Besylate59 claims
- Duloxetine Hcl59 claims
- Lisinopril57 claims
- Atorvastatin Calcium48 claims
- Losartan Potassium47 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.
Genna N. Tonstad among 3,995 nurse practitioner records in Wisconsin
Genna N. Tonstad, APNP is one of 3,995 nurse practitioner records with a practice address in Wisconsin. 77% 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 85% of them.
- NPI issued2023 · 85% of these records are older, 10% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2023 · median 2017 among the 2,701 with a school on file
- Record last updated2024 · 41% 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 Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
516 nurse practitioner records list a practice address in Madison
They are 516 of the 15,014 NPPES records with a practice address in Madison, and 3,995 nurse practitioner records in Wisconsin.
All 3,995 in Wisconsin → Every provider in Madison → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Pamela Amundson, FNP-CMadison, WI 537041932734910
- Krystal Boardman, RNNPMadison, WI 537041073719175
- Amanda Browne, NPMadison, WI 537041184876872
- Trenell Darby, DNPMadison, WI 537041619413960
- Catherine Goebel, MSN, APRN, FNP-CMadison, WI 537041689206567
- Kristin Keepman, NPMadison, WI 537041871717926
- Sarah Kruger, NPMadison, WI 537041699723080
- Bethann Nowak, APNPMadison, WI 537041548931009
Common questions
What is Genna N. Tonstad, APNP's NPI number?
Genna N. Tonstad, APNP's National Provider Identifier (NPI) is 1386421279, issued on Sep 13, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Genna N. Tonstad, APNP located?
The NPPES record lists a practice address at 4781 Hayes RD Ste 101, Madison, WI, 53704. Phone: (888) 938-3838. Providers update this record themselves, so call before visiting.
How can I verify Genna N. Tonstad, APNP's license?
NPPES lists Wisconsin license number 14046, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Genna N. Tonstad, APNP prescribe under Medicare Part D?
In 2024, Genna N. Tonstad, APNP had 1,735 Medicare Part D claims for 117 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.