Dr. Mark E. Rassier, MD
- Medicare services, 2020
- 357
- Part D claims, 2020
- 253
- Industry payments
- $17
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 9601 Townline Rd, Minocqua, WI 54548
- Practice phone
- Call (715) 358-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Marshfield Clinic - Minocqua (Townline Rd)
Multi-specialty group site · Minocqua, Wisconsin
Find Dr. Rassier's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark E. Rassier is a nephrologist in Minocqua, Wisconsin
Dr. Rassier practices at Marshfield Clinic - Minocqua (Townline Rd) in Minocqua, Wisconsin.
Dr. Rassier's NPI, 1063514164, was assigned on September 1, 2006. Dr. Rassier holds Wisconsin license 36111.
- NPI
- 1063514164NPI Registry (opens in a new tab)
- NPI enumeration date
- September 1, 2006
- NPI status
- Active
- Practice phone
- (715) 358-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark E. Rassier practices at Marshfield Clinic - Minocqua (Townline Rd) in Minocqua, Wisconsin
Dr. Rassier's primary practice is Marshfield Clinic - Minocqua (Townline Rd), at 9601 Townline Rd, Minocqua, WI 54548. The practice phone is (715) 358-1000.
- Marshfield Clinic - Minocqua (Townline Rd)9601 Townline Rd, Minocqua, WI 54548Phone(715) 358-1000
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark E. Rassier is affiliated with 1 site of care and 1 medical group
Dr. Rassier's primary practice is Marshfield Clinic - Minocqua (Townline Rd) in Minocqua, Wisconsin. The medical group on file is Marshfield Clinic Health System.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Mark E. Rassier's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rassier practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Marshfield Clinic - Minocqua (Townline Rd) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark E. Rassier is one of 168 nephrologists in Wisconsin
Nephrology is Dr. Rassier's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Rassier is licensed in Wisconsin.
Specialties and state licenses
- Nephrology, WisconsinPrimary
Nephrologists near Dr. Rassier
Counts of nephrologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark E. Rassier billed Medicare for 357 services in 2020
CMS data shows 357 Medicare services from Dr. Rassier across 9 procedure codes in 2020. Medicare paid $34,566 for them. Every service was in an office.
Dr. Rassier's Medicare services by type, 2019 to 2020
- 2019
- 2020
- Tests and treatments
- 2019: 1,2602020: 17186%
- Lab and pathology
- 2019: 7592020: 12484%
- Surgery
- 2019: 2152020: 3982%
- Office and hospital visits
- 2019: 2442020: 2391%
- Other services
- 2019: 312020: 0100%
Dr. Rassier compared with the Wisconsin median for nephrologists, 2020
- Dr. Rassier
- Wisconsin median
- Medicare services
- 357vs 67747% below
- Part D claims
- 253vs 65161% below
Medians across 167 nephrologists in Wisconsin with Dmand AI profiles that report each measure.
Dr. Rassier's most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Rassier and other nephrologists in Wisconsin.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark E. Rassier's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Rassier's median patient age at 73, with 50% women.
Dr. Rassier's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women50%
- Men50%
Source: Dmand AI Patient Panel Data
Dr. Mark E. Rassier wrote 253 Medicare Part D claims in 2020
In 2020, Dr. Rassier wrote 253 Medicare Part D claims. They cover 12 drugs, with $6,552 in total drug cost. In 2019, CMS named 688 claims across 26 drugs.
Dr. Rassier's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 6882020: 25363%
Drugs named by CMS: 12 in 2020, 26 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Mark E. Rassier received $17 in industry payments in 2016
CMS Open Payments shows 2 general payments to Dr. Rassier from 2 drug and device companies in 2016. Food and beverage make up the largest share, 92% of the total. Amgen Inc. paid the most, $16.
General payments to Dr. Rassier by kind, 2016 to 2016
- Food and beverage$1692%
- Education$18%
Companies that paid Dr. Rassier the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark E. Rassier's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark E. Rassier
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark E. Rassier's NPI number?
Dr. Mark E. Rassier's NPI number is 1063514164. It was assigned on September 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark E. Rassier?
Dr. Mark E. Rassier is a nephrologist in Minocqua, Wisconsin. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Mark E. Rassier practice?
Dr. Rassier practices at 9601 Townline Rd, Minocqua, WI 54548. Dr. Rassier's primary practice is Marshfield Clinic - Minocqua (Townline Rd) in Minocqua, Wisconsin.
What is Dr. Mark E. Rassier's office phone number?
The practice phone on file for Dr. Rassier is (715) 358-1000.
What is Dr. Mark E. Rassier's medical license number?
Dr. Rassier holds Wisconsin license 36111.
What medical group is Dr. Mark E. Rassier part of?
Dr. Rassier is linked to Marshfield Clinic Health System.
Does Dr. Mark E. Rassier accept Medicare?
Yes. CMS data shows Dr. Rassier billed Medicare for 357 services in 2020.
What services does Dr. Mark E. Rassier bill to Medicare?
In 2020, Dr. Rassier's most billed Medicare services were dialysis (90960), surgery: heart and blood vessels (36415) and lab and pathology test (80069).
What drugs does Dr. Mark E. Rassier prescribe most?
In 2020 Medicare Part D data, Dr. Rassier's most prescribed drugs by claims were Losartan Potassium, Allopurinol and Furosemide.
Has Dr. Mark E. Rassier received payments from drug or device companies?
CMS Open Payments shows $17 in general payments to Dr. Rassier from 2 companies from 2016 to 2016. The largest total came from Amgen Inc.
How long has Dr. Mark E. Rassier been practicing?
Dr. Rassier's NPI was assigned in 2006.
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