Quick answers
- Does Willie C. McClairen Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Willie C. McClairen Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Willie C. McClairen Jr. see?
- In 2024, CMS data shows 260 Original Medicare patients and 720 services for Willie C. McClairen Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Willie C. McClairen Jr.'s NPI number?
- 1588768857. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Willie C. McClairen Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 260 |
|---|---|
| Services billed to Medicare | 720 |
| Different services or procedures | 46 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)363 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)131 services
- Hospital discharge day management, more than 30 minutes (99239)56 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)23 services
- Complete ultrasound scan of abdomen (76700)17 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol73%
- Arthritis48%
- Depression36%
- Chronic kidney disease36%
- Diabetes33%
Hospitals where Willie C. McClairen Jr. works
Medicare's Facility Affiliation Data lists Willie C. McClairen Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mary Greeley Medical CenterAmes, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160030
- MercyOne Des Moines Medical CenterDes Moines, IA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 160083
- MercyOne Newton Medical CenterNewton, IA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 160032
- Ottumwa Regional Health CenterOttumwa, IA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 160089
- Van Diest Medical CenterWebster City, IA · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 161361
Practice locations
Addresses where Willie C. McClairen Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1111 6th AveDes Moines, IA 50314
- 315 University AveDes Moines, IA 50314 (515) 244‑9950
- 330 Laurel St, Suite 1200Des Moines, IA 50314
- 800 E 1st StAnkeny, IA 50021
Group practices
Medicare enrollment lists Willie C. McClairen Jr. as a member of this group (CMS data updated October 2, 2026).
- Mercy Clinics Inc443 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Des Moines
Clinicians with the same Medicare primary specialty in Des Moines, IA — not a recommendation.
Other clinicians in Mercy Clinics Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 1985 (41 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1588768857 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians