Mark P. Ridder, M.D.
Infectious Disease Physician · Marshfield, WI
Mark P. Ridder, M.D. is an infectious disease physician with a practice address in Marshfield, Wisconsin, and NPI 1821542739, issued on Aug 9, 2016. Check the license (Wisconsin 68148, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark P. Ridder
- Credential
- M.D.
- Primary taxonomy
- Infectious Disease Physician 207RI0200X
- License number
- 68148 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1000 N Oak Ave, Marshfield, WI 54449
- Phone
- (715) 387-5511
- Enumerated
- Aug 9, 2016
- Record last updated
- Dec 12, 2022
- Medicare enrollment
- Enrolled (PECOS I20210701000242); accepts Medicare assignment
- Medical or professional school
- Sanford School Of Medicine Of University Of South Dakota, 2016
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest infectious disease physician records → All 171 in Wisconsin → Look up another NPI →
Also registered at 1000 N Oak Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sheetal Aatrai, MDInternal Medicine Physician1417568965
- Sukaina AbbasPediatrics Physician1407529191
- Chady Abboud Leon, M.D.Hematology & Oncology Physician1770737744
- Ihab Abdalrahman, MDHospitalist Physician1497855134
- Raquel Abengozar Mingorance, MDStudent in an Organized Health Care Education/Training Program1609437755
- Aanuoluwa Abiola, M.DGeriatric Medicine (Internal Medicine) Physician1598117574
Verify Mark P. Ridder in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 68148Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
20% fewer Medicare Part D claims than the average infectious disease physician in 2024
552 Medicare Part D claims for 121 beneficiaries, against an average of 689 among the 7,388 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Cephalexin78 claims
- Biktarvy50 claims
- Penicillin V Potassium48 claims
- Sulfamethoxazole-Trimethoprim43 claims
- Ceftriaxone37 claims
- Amoxicillin-Clavulanate Potass27 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): 78.9 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 3 group practices
- Flambeau Hospital, Inc.Park Falls, WI
- Lakeview Medical Center Inc OF Rice LakeCumberland, WI
- Mchs Hospitals IncMarshfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark P. Ridder among 171 infectious disease physician records in Wisconsin
Mark P. Ridder, M.D. is one of 171 infectious disease physician records with a practice address in Wisconsin. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 19% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated2016 · median 2004 among the 125 with a school on file
- Record last updated2022 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0200X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Infectious Disease Physician providers in Wisconsin
There are 171 infectious disease physician records in Wisconsin.
All 171 in Wisconsin → Every provider in Marshfield → Infectious Disease Physician nationwide →
The 8 infectious disease physician records with the nearest ZIP codes
- Ray Haselby, DOMarshfield, WI 544491598873648
- J Lee, MDMarshfield, WI 544491417031014
- Rana Nasser, MDMarshfield, WI 544491194825406
- Adaora Okoli, MDMarshfield, WI 544491619536398
- Jeanne Spellman, MDMarshfield, WI 544491144320896
- Matthew Hall, MDWeston, WI 544761023126174
- Linda Seale, MDMinocqua, WI 545481295836989
- Kali Maniam, MDGreen Bay, WI 543111972164903
Common questions
What is Mark P. Ridder, M.D.'s NPI number?
Mark P. Ridder, M.D.'s National Provider Identifier (NPI) is 1821542739, issued on Aug 9, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Mark P. Ridder, M.D. located?
The NPPES record lists a practice address at 1000 N Oak Ave, Marshfield, WI, 54449. Phone: (715) 387-5511. Providers update this record themselves, so call before visiting.
How can I verify Mark P. Ridder, M.D.'s license?
NPPES lists Wisconsin license number 68148, 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 Mark P. Ridder, M.D. prescribe under Medicare Part D?
In 2024, Mark P. Ridder, M.D. had 552 Medicare Part D claims for 121 beneficiaries; the average among infectious disease physician prescribers was 689. Part D covers Medicare prescriptions only.
What is Mark P. Ridder, M.D.'s MIPS final score?
The 2023 MIPS final score is 78.9 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.