NATHANIEL JAMES STEWART (M.D.) – Orthopaedic Surgery Physician, NPI 1225064017
Orthopaedic Surgery Physician
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Profile Insights
NPPES metrics only — not quality of care.
628 ORTHOPEDIC SURGERY in WI
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Provider Addresses for NATHANIEL JAMES STEWART (M.D.)
OakLeaf Way, River Prairie Townhomes, Altoona, Eau Claire County, Wisconsin, 54720, United States
SUITE A
ALTOONA, WI 547202245
Phone: (715) 832-1400
Fax: (715) 832-4187
Type: Mailing
1200 OAKLEAF WAY STE A
ALTOONA, WI 547202217
Phone: (715) 832-1400
Fax: (715) 832-4187
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 25 Open Payments records for all available years, with a total value of $8,107.
Total Amount is formed as General ($8,107) + Research ($0) + Ownership ($0) = $8,107.
Last reported payment date: 2024-11-18 • Largest payer in this snapshot: Medical Device Business Services, Inc. ($6,750).
Total Amount
$8,107
General + Research + Ownership
Payments
25
Total payment records
General Amount
$8,107
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-18
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2004-06-19
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 |
|---|---|---|---|---|
| I20040619000068 | 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 | 552 | 53 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 293 | 216 | $0 |
| 73502 | X-ray of hip, 2-3 views | 280 | 214 | $0 |
| 73562 | X-ray of knee, 3 views | 184 | 132 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 135 | 110 | $0 |
Insurance plans in this area (ZIP 54720)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| ORTHOPEDIC SURGERY | WI | 20610 | Aspiration and/or injection of large joint or joint capsule | 77 | 60 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | WI | |
| Orthopedic Surgery | WI | |
| - | WI | |
| Physician Assistant | WI | |
| Nurse Practitioner | WI | |
| Orthopedic Surgery | WI | |
| Orthopedic Surgery | WI | |
| - | WI | |
| Physician Assistant | WI | |
| Nurse Practitioner | WI |
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