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DR. NATHANIEL THOMAS LEU MD
NPI 1548780711
Emergency Medicine in Eau Claire, WI

Active since June 20, 2017PECOS Enrolled
1400 BELLINGER ST, EAU CLAIRE, WI 54703(715) 838-5222 Get Directions Write a Review

NPPES record last updated: March 28, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 28, 2023, Aug 23, 2022, Jul 28, 2022 and 2 more (5 updates tracked since 2017).

About Dr. Nathaniel Thomas Leu Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. NATHANIEL THOMAS LEU MD (NPI 1548780711) is an individual emergency medicine provider in Eau Claire, Wisconsin, licensed in Wisconsin (81744) and active in the NPI registry since June 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1548780711
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. NATHANIEL THOMAS LEUCredential: MD
Location Address1400 BELLINGER STEau Claire, WI 54703-5222
Mailing Address200 1st St SwRochester, MN 55905-0001 · (715) 838-5222
Phone(715) 838-5222
Sole ProprietorNo
Enumeration DateJune 20, 2017
Last NPPES UpdateMarch 28, 20235 updates tracked since enumeration
NPPES CertifiedMarch 28, 2023
✔ NPI 1548780711 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in WI · 81744✔ Licensed in CA · A171444✔ Licensed in IL · 125071297✔ Licensed in WI · 22629
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
1400 BELLINGER ST, Eau Claire, WI 54703
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Nathaniel Thomas Leu Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Nathaniel Leu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mayo Clinic Health System-Northwest Wisconsin Region, Inc.
1.4 mi
Multi-Specialty
733 W CLAIREMONT AVE
Eau Claire, WI 54701
NPI 1235588831 (715) 838-5222
Mayo Clinic Health System-Southwest Wisconsin Region, Inc.
69 mi
Critical Access
310 W MAIN ST
Sparta, WI 54656
  • Reassigned Medicare billing, Wisconsin enrollment
  • Also billed through NPI 1629056049 (Wisconsin)
  • 336 clinicians in this Medicare group
NPI 1841278637 (608) 269-2132

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 6

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
118 services117 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
59 services57 patients
Ultrasound of heart, follow-up 93308
A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.
40 services40 patients
Ultrasound scan of chest 76604
An ultrasound scan of the chest is a non-invasive imaging procedure that uses sound waves to create pictures of the structures within your chest, such as your heart and lungs. It's a safe, painless method that helps doctors diagnose and monitor various conditions.
32 services32 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
27 services27 patients
Emergency department visit with low level of medical decision making 99283
An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.
13 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 54703 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$82.92 typical visit price
range $53.90 – $163.24
Typical copayment $20.73 (range $13.47 – $40.81)
Most-billed visit code 99203
Established Patient
$95.41 typical visit price
range $17.40 – $133.76
Typical copayment $23.85 (range $4.35 – $33.44)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

ELLEN A CHRISTENSEN OT
Occupational Therapist
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
JESSICA ERIN ROETS OT
Occupational Therapist
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
SUZANNE M STEWART LPC
Counselor (Professional)
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
KATHRYN LEIGH OLSON MHA, RD, LDN,CDE
Dietitian, Registered
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
CAMILLA MICHELLE NELSON MD
Pediatrics
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
SARAH HOTOVY MD
Family Medicine
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-3311
JADE ELLIE JEHN
Occupational Therapist
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222
ANDREA AGUAYO PHARMD
Pharmacist
1400 BELLINGER ST
EAU CLAIRE, WI 54703
Eau Claire County (715) 838-5222

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 Leu's NPI number?

The NPI number for Nathaniel Leu is 1548780711. It was assigned to this individual provider in the NPPES registry on June 20, 2017.

Where is Nathaniel Leu located?

Nathaniel Leu practices at 1400 Bellinger St, Eau Claire, WI 54703. The listed phone number is (715) 838-5222.

What is Nathaniel Leu's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Nathaniel Leu enrolled in Medicare?

Yes. Nathaniel Leu is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nathaniel Leu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Leu reassigns Medicare benefits to 2 organizations: Mayo Clinic Health System-Northwest Wisconsin Region, Inc. (Eau Claire, WI) and Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (Sparta, 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 Leu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Nathaniel Leu was last updated on March 28, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.