Sara Gretenhart, APNP
Family Nurse Practitioner · Cudahy, WI
Sara Gretenhart, APNP is a family nurse practitioner with a practice address in Cudahy, Wisconsin, and NPI 1821556317, issued on Mar 4, 2019. Check the license (Wisconsin 8850-33, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Sara Gretenhart
- Credential
- APNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 8850-33 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3108 E Hammond Ave, Cudahy, WI 53110
- Phone
- (414) 722-2947
- Enumerated
- Mar 4, 2019
- Record last updated
- Mar 4, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 2,814 in Wisconsin → Look up another NPI →
Verify Sara Gretenhart in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 8850-33Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average family nurse practitioner in 2024
254 Medicare Part D claims for 140 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 25 claims were for opioids.
Most prescribed
- Tamsulosin Hcl41 claims
- Ciprofloxacin Hcl40 claims
- Hydrocodone-Acetaminophen15 claims
- Nitrofurantoin Mono-Macro14 claims
- Oxybutynin Chloride Er14 claims
- Sulfamethoxazole-Trimethoprim13 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.
Industry payments in 2024: $228.23
9 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US 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.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Sara Gretenhart among 2,814 family nurse practitioner records in Wisconsin
Sara Gretenhart, 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 2019, is newer than 52% of them.
- NPI issued2019 · 52% of these records are older, 41% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2019 · 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).
7 family nurse practitioner records list a practice address in Cudahy
They are 7 of the 174 NPPES records with a practice address in Cudahy, and 2,814 family nurse practitioner records in Wisconsin.
All 2,814 in Wisconsin → Every provider in Cudahy → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Ellayna Dzenzeol, APNP, FNP-CCudahy, WI 531101912721465
- Asia Gomez, NPCudahy, WI 531101245844364
- Kristie Koney, APNPCudahy, WI 531101801652474
- Jaclynn Lien-Skubal, APNPCudahy, WI 531101710237078
- Kathryn Merkel, APNPCudahy, WI 531101346792181
- Brienn Murray, FNPCudahy, WI 531101093442287
- Brianna Barker, APNPBurlington, WI 531051730503954
- Mark Christman, APNPBurlington, WI 531051659380715
Common questions
What is Sara Gretenhart, APNP's NPI number?
Sara Gretenhart, APNP's National Provider Identifier (NPI) is 1821556317, issued on Mar 4, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Sara Gretenhart, APNP located?
The NPPES record lists a practice address at 3108 E Hammond Ave, Cudahy, WI, 53110. Phone: (414) 722-2947. Providers update this record themselves, so call before visiting.
How can I verify Sara Gretenhart, APNP's license?
NPPES lists Wisconsin license number 8850-33, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Sara Gretenhart, APNP prescribe under Medicare Part D?
In 2024, Sara Gretenhart, APNP had 254 Medicare Part D claims for 140 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.