Mary E. Horner, NP
Family Nurse Practitioner · Oconomowoc, WI
Mary E. Horner, NP is a family nurse practitioner with a practice address in Oconomowoc, Wisconsin, and NPI 1962717371, issued on Aug 10, 2010. Check the license (Wisconsin 4109, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary E. Horner
- Credential
- NP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 4109 WI
Self-reported in NPPES; status is on the state search - Practice location
- 771 Burr Oak LN, Oconomowoc, WI 53066
- Phone
- (414) 687-0936
- Enumerated
- Aug 10, 2010
- Record last updated
- Mar 10, 2025
- Medicare enrollment
- Enrolled (PECOS I20101220001024); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Verify Mary E. Horner in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 4109Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8.9 times the Medicare Part D claims of the average family nurse practitioner in 2024
11,599 Medicare Part D claims for 272 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 83 claims were for opioids.
Most prescribed
- Potassium Chloride529 claims
- Furosemide474 claims
- Levothyroxine Sodium462 claims
- Sertraline Hcl436 claims
- Atorvastatin Calcium432 claims
- Quetiapine Fumarate425 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
- Prohealth Medical Group IncOconomowoc, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary E. Horner among 2,814 family nurse practitioner records in Wisconsin
Mary E. Horner, NP 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 2010, is newer than 18% of them.
- NPI issued2010 · 18% of these records are older, 80% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2010 · median 2019 among the 1,740 with a school on file
- Record last updated2025 · 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).
10 family nurse practitioner records list a practice address in Oconomowoc
They are 10 of the 506 NPPES records with a practice address in Oconomowoc, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Oconomowoc → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Katherine Brockway, NPOconomowoc, WI 530661891500906
- Gail Buchberger, APNPOconomowoc, WI 530661023137866
- Angela Ellenberger, NPSummit, WI 530661285139188
- Amie Jabang, APNPOconomowoc, WI 530661760946628
- Lauren Olson, APRNOconomowoc, WI 530661477984334
- Sarah Sanford-Smith, MSN FNP-COconomowoc, WI 530661073197000
- Amy Schmidt, APNPSummit, WI 530661780317941
- Sarah Schwigel, MSN, APNP, FNP-COconomowoc, WI 530661841020500
Common questions
What is Mary E. Horner, NP's NPI number?
Mary E. Horner, NP's National Provider Identifier (NPI) is 1962717371, issued on Aug 10, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Mary E. Horner, NP located?
The NPPES record lists a practice address at 771 Burr Oak LN, Oconomowoc, WI, 53066. Phone: (414) 687-0936. Providers update this record themselves, so call before visiting.
How can I verify Mary E. Horner, NP's license?
NPPES lists Wisconsin license number 4109, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Mary E. Horner, NP prescribe under Medicare Part D?
In 2024, Mary E. Horner, NP had 11,599 Medicare Part D claims for 272 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.