NATHANIEL SETH LADEN M.D., M.S.
NPI 1356316889
Thoracic Surgery (Cardiothoracic Vascular Surgery) in Milwaukee, WI
About Nathaniel Seth Laden M.d., M.s. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
NATHANIEL SETH LADEN M.D., M.S. (NPI 1356316889) is an individual thoracic surgery (cardiothoracic vascular surgery) provider in Milwaukee, Wisconsin, licensed in Wisconsin (18081) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS, is affiliated with Aspirus Stevens Point Hospital & Clinics, Inc., and is a graduate of University Of Toledo College Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 6
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Nathaniel Seth Laden M.d., M.s. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Nathaniel Laden reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Milwaukee, WI 53226
- Reassigned Medicare billing, Wisconsin enrollment
- 3,983 clinicians in this Medicare group
Stevens Point, WI 54482
- Reassigned Medicare billing, Wisconsin enrollment
- Medicare enrollment name: Aspirus Medical Group, Inc.
- 415 clinicians in this Medicare group
Stevens Point, WI 54482
- Reassigned Medicare billing, Wisconsin enrollment
- 633 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 2
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Aspirus Stevens Point Hospital & Clinics, Inc.
Acute Care Hospitals · Stevens Point, WIAspirus Wausau Hospital
Acute Care Hospitals · Wausau, WIAspirus Riverview Hospital & Clinics Inc
Acute Care Hospitals · Wisconsin Rapids, WIHoward Young Medical Center
Acute Care Hospitals · Woodruff, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53226 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
MILWAUKEE, WI 53226
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Nathaniel Laden's NPI number?
The NPI number for Nathaniel Laden is 1356316889. It was assigned to this individual provider in the NPPES registry on February 20, 2006.
Where is Nathaniel Laden located?
Nathaniel Laden practices at 9200 W Wisconsin Ave Cardiothoracic Surgery, Milwaukee, WI 53226. The listed phone number is (414) 955-6900.
What is Nathaniel Laden's specialty?
The primary specialty registered for this NPI is Thoracic Surgery (Cardiothoracic Vascular Surgery) with taxonomy code 208G00000X.
Is Nathaniel Laden enrolled in Medicare?
Yes. Nathaniel Laden is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Nathaniel Laden's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Laden reassigns Medicare benefits to 3 organizations: The Medical College Of Wisconsin, Inc. (Milwaukee, WI), Aspirus Wausau Hospital, Inc. (Stevens Point, WI) and Aspirus Wausau Hospital, Inc. (Stevens Point, WI). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Nathaniel Laden's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Nathaniel Laden accept?
Health plans from Anthem Blue Cross and Blue Shield list Nathaniel Laden as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Nathaniel Laden affiliated with any hospitals?
According to CMS data, Nathaniel Laden is affiliated with Aspirus Stevens Point Hospital & Clinics, Inc., Aspirus Wausau Hospital, Aspirus Riverview Hospital & Clinics Inc and Howard Young Medical Center.
When was this NPI record last updated?
The NPPES record for Nathaniel Laden was last updated on May 2, 2016. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Nathaniel Seth Laden, M.D., M.S. · NPI 1356316889
Thoracic Surgery (Cardiothoracic Vascular Surgery) physician in Milwaukee, Wisconsin. Individual provider, active in the CMS NPPES registry since February 20, 2006.
## Identity
- **NPI:** 1356316889 (Entity type: Individual)
- **Enumerated:** February 20, 2006
- **Primary specialty:** Thoracic Surgery (Cardiothoracic Vascular Surgery) · taxonomy 208G00000X
- **State license:** 18081 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 9200 W WISCONSIN AVE, CARDIOTHORACIC SURGERY, Milwaukee, WI 53226-3522
- **Phone:** (414) 955-6900 · **Fax:** (414) 955-6204
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): The Medical College Of Wisconsin, Inc. (NPI 1699720086, Milwaukee, WI); Aspirus Wausau Hospital, Inc. (NPI 1275886749, Stevens Point, WI); Aspirus Wausau Hospital, Inc. (NPI 1275886749, Stevens Point, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Toledo College Of Medicine, class of 1988
## Record status
- **NPPES last updated:** May 2, 2016
- **Other identifiers:** Other 9338635 (OH); Medicare PIN 0822355 (OH); Other 2551671 (OH); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1356316889) · Data from the CMS NPPES public registry.