Cassandra Hartwig, NP
Nurse Practitioner · Waterloo, WI
Cassandra Hartwig, NP is a nurse practitioner with a practice address in Waterloo, Wisconsin, and NPI 1215476163, issued on Feb 13, 2017. Check the license (Wisconsin 7517, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Cassandra Hartwig
- Credential
- NP
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 7517 WI
Self-reported in NPPES; status is on the state search - Practice location
- 537 Mckay Way, Waterloo, WI 53594
- Phone
- (608) 206-4364
- Enumerated
- Feb 13, 2017
- Record last updated
- Jun 23, 2023
- Medicare enrollment
- Enrolled (PECOS I20170309002447); accepts Medicare assignment
- Entity
- Type 1 · individual
Verify Cassandra Hartwig in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 7517Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average nurse practitioner in 2024
97 Medicare Part D claims for 60 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Doxycycline Hyclate23 claims
- Amoxicillin-Clavulanate Potass13 claims
- Levofloxacin13 claims
- Cephalexin11 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): 84.6 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.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $21.40
1 payment: food and beverage; the largest payer was Smith+Nephew, Inc. The 38,884 providers of this specialty with any payment received $791.64 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.
Bills Medicare through one group practice
- Aspirus Rhinelander And Tomahawk Hospitals And Clinics, Inc.Tomahawk, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
1 nurse practitioner records list a practice address in Waterloo
They are 1 of the 26 NPPES records with a practice address in Waterloo, and 3,995 nurse practitioner records in Wisconsin.
Other nurse practitioner records in Wisconsin
- Caroline Aaberg, APNPMadison, WI1881384394
- Joyce Abbott, APNPOshkosh, WI1003824665
- Mohamed Abdelazim, APNPAppleton, WI1760266696
- Jacklyn Abel, AGACNP-BCMauston, WI1104631506
- Henrietta Abili, APNPGermantown, WI1174859524
- Jade Abts, NPGreen Bay, WI1992293708
- Karalyn Adam, DNP, RNMarshfield, WI1780933051
- Carol Adamczyk, MSNWauwatosa, WI1457502395
- Amanda Adams, NPMadison, WI1023366598
- Bernadette Adams, FNPWestby, WI1427047620
Common questions
What is Cassandra Hartwig, NP's NPI number?
Cassandra Hartwig, NP's National Provider Identifier (NPI) is 1215476163, issued on Feb 13, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Cassandra Hartwig, NP located?
The NPPES record lists a practice address at 537 Mckay Way, Waterloo, WI, 53594. Phone: (608) 206-4364. Providers update this record themselves, so call before visiting.
How can I verify Cassandra Hartwig, NP's license?
NPPES lists Wisconsin license number 7517, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Cassandra Hartwig, NP prescribe under Medicare Part D?
In 2024, Cassandra Hartwig, NP had 97 Medicare Part D claims for 60 beneficiaries; the average among nurse practitioner prescribers was 1,109. Part D covers Medicare prescriptions only.
What is Cassandra Hartwig, NP's MIPS final score?
The 2023 MIPS final score is 84.6 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.