MARK P RIDDER (M.D.) – Internal Medicine Physician, NPI 1821542739
Internal Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
184 INFECTIOUS DISEASE in WI
Provider Addresses for MARK P RIDDER (M.D.)
M120 HIGHWAY 97
MARSHFIELD, WI 54449
Phone: (715) 502-5575
Type: Mailing
M120 Highway 97
Marshfield, WI 54449
Phone: (715) 502-5575
Type: Location
1000 N OAK AVE
MARSHFIELD, WI 544495703
Phone:
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2021-07-01
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20210701000242 | I | Infectious Disease | WI | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 390 | 143 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 123 | 111 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 107 | 70 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 59 | 45 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 40 | 33 | $0 |
Insurance plans in this area (ZIP 54449)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | WI | |
| Cardiac Electrophysiology, Cardiovascular Disease (Cardiology) | WI | |
| Medical Oncology | CA | |
| Family Practice | WI | |
| Internal Medicine | WI | |
| P O D I A T R Y | IL | |
| Nurse Practitioner | WI | |
| Registered Dietitian Or Nutrition Professional | WI | |
| Infectious Disease, Internal Medicine | WI | |
| Hematology/Oncology, Medical Oncology | IL |
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