NATHANIEL SETH LADEN (M.D., M.S.) – Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician, NPI 1356316889
Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
118 THORACIC SURGERY in WI
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Provider Addresses for NATHANIEL SETH LADEN (M.D., M.S.)
Froedtert Hospital, 9200, West Wisconsin Avenue, Cannon Park, Wauwatosa, Milwaukee County, Wisconsin, 53226, United States
CARDIOTHORACIC SURGERY
MILWAUKEE, WI 532263522
Phone: (414) 955-6900
Fax: (414) 955-6204
Mailing address matches the actual address.
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.
This can happen when there are no reportable CMS Open Payments records.
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: 2016-05-05
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 |
|---|---|---|---|---|
| I20160505000910 | I | Thoracic 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 |
|---|---|---|---|---|
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 121 | 119 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $0 |
Insurance plans in this area (ZIP 53226)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | NC | |
| - | IL | |
| Family Practice | WI | |
| - | MI | |
| Family Practice | WI | |
| Family Practice | WI | |
| - | WI | |
| Hospitalist, Internal Medicine | WI | |
| - | WI | |
| - | WI |
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