DR. ALEXANDER MICHAEL RIORDAN (M.D.) – Orthopaedic Surgery Physician, NPI 1972879534
Orthopaedic Surgery Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
628 ORTHOPEDIC SURGERY in WI
Provider Addresses for DR. ALEXANDER MICHAEL RIORDAN (M.D.)
525 W RIVER WOODS PKWY STE 100
GLENDALE, WI 532121010
Phone: (414) 332-6262
Fax: (414) 332-0422
Type: Mailing
PO BOX 735044
CHICAGO, IL 606735044
Phone: (800) 326-2250
Type: Mailing
200 E RYAN RD
OAK CREEK, WI 531544563
Phone: (414) 570-3590
Type: Location
525 W River Woods Pkwy Ste 100
Glendale, WI 532121010
Phone: (414) 332-6262
Fax: (414) 332-0422
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 5 Open Payments records for all available years, with a total value of $3,248.
Total Amount is formed as General ($3,248) + Research ($0) + Ownership ($0) = $3,248.
Last reported payment date: 2024-01-30 • Largest payer in this snapshot: Stryker Corporation ($3,248).
Total Amount
$3,248
General + Research + Ownership
Payments
5
Total payment records
General Amount
$3,248
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-01-30
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Stryker Corporation | $3,248 |
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: 2017-07-27
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 |
|---|---|---|---|---|
| I20170727000470 | I | Orthopedic Surgery | 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 |
|---|---|---|---|---|
| J3301 | Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 212 | 39 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 60 | 54 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 46 | 46 | $0 |
| 20611 | Aspiration and/or injection of fluid large joint using ultrasound guidance | 29 | 23 | $0 |
| 20610 | Aspiration and/or injection of fluid from large joint | 22 | 20 | $0 |
Insurance plans in this area (ZIP 53212)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Diagnostic Radiology | WI | |
| Physician Assistant | WI | |
| - | WI | |
| - | WI | |
| - | WI | |
| Diagnostic Radiology | WI | |
| - | WI | |
| Family Practice | WI | |
| Family Practice, Geriatric Medicine | IL | |
| - | WI |
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