Rachael Ziska, D.O.
Internal Medicine Physician · Fitchburg, WI
Rachael Ziska, D.O. is an internal medicine physician with a practice address in Fitchburg, Wisconsin, and NPI 1104204247, issued on May 8, 2015. Check the license (Wisconsin 6950621, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Rachael Ziska
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 6950621 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3051 Cahill Main, Fitchburg, WI 53711
- Phone
- (608) 661-7200
- Enumerated
- May 8, 2015
- Record last updated
- Oct 11, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20181025000794); accepts Medicare assignment
- Medical or professional school
- University Of Minnesota Medical School, 2018
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 3051 Cahill Main
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Taylor AllardMassage Therapist1932450111
- Stephen Almasi, MDFamily Medicine Physician1720399058
- Jeffrey Anders, MDChild & Adolescent Psychiatry Physician1093734758
- Qinglu Bai, LPC-ITProfessional Counselor1558258194
- Carol Ballweg, APNPFamily Nurse Practitioner1609990381
Verify Rachael Ziska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 6950621Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average internal medicine physician in 2024
2,569 Medicare Part D claims for 179 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 105 claims were for opioids.
Most prescribed
- Atorvastatin Calcium131 claims
- Rosuvastatin Calcium106 claims
- Omeprazole102 claims
- Amlodipine Besylate87 claims
- Levothyroxine Sodium82 claims
- Trazodone Hcl77 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): 80.2 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).
Bills Medicare through one group practice
- Group Health Cooperative OF South Central WisconsinFitchburg, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachael Ziska among 2,078 internal medicine physician records in Wisconsin
Rachael Ziska, D.O. is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 73% of them.
- NPI issued2015 · 73% of these records are older, 25% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2018 · median 2002 among the 1,098 with a school on file
- Record last updated2018 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Wisconsin
There are 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Fitchburg → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Wendy Adams, MDFitchburg, WI 537111396991055
- Ayesha Bashir, M.D., M.P.HMadison, WI 537111750541124
- Sarah Dorsey, MDMadison, WI 537111114000312
- Norman Jensen, MD MSMadison, WI 537111619943651
- Patricia Kraemer, M.D.Fitchburg, WI 537111710953757
- Geralyn Palmer, MDMadison, WI 537111851966220
- Emilia Ruiz, M.D.Madison, WI 537111497048235
- Paul Shattuck, M.D.Madison, WI 537111902868300
Common questions
What is Rachael Ziska, D.O.'s NPI number?
Rachael Ziska, D.O.'s National Provider Identifier (NPI) is 1104204247, issued on May 8, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Rachael Ziska, D.O. located?
The NPPES record lists a practice address at 3051 Cahill Main, Fitchburg, WI, 53711. Phone: (608) 661-7200. Providers update this record themselves, so call before visiting.
How can I verify Rachael Ziska, D.O.'s license?
NPPES lists Wisconsin license number 6950621, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rachael Ziska, D.O. prescribe under Medicare Part D?
In 2024, Rachael Ziska, D.O. had 2,569 Medicare Part D claims for 179 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Rachael Ziska, D.O.'s MIPS final score?
The 2023 MIPS final score is 80.2 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.