Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ALEXANDRA ERNST MD, MPH
NPI 1144845900
Orthopaedic Surgery in Milwaukee, WI

Active since June 08, 2020PECOS Enrolled
9200 W WISCONSIN AVE, MILWAUKEE, WI 53226(414) 805-7400(414) 805-7388 Get Directions Write a Review

NPPES record last updated: September 30, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

Record update history: Sep 30, 2026, Sep 10, 2026, Oct 12, 2025 and 2 more (5 updates tracked since 2020).

About Alexandra Ernst Md, Mph NPPES

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

ALEXANDRA ERNST MD, MPH (NPI 1144845900) is an individual orthopaedic surgery provider in Milwaukee, Wisconsin, licensed in Wisconsin (87965-020) and active in the NPI registry since June 2020. She is enrolled in Medicare PECOS, is affiliated with Renown Regional Medical Center, and is a graduate of Emory University School Of Medicine (2020).

NPPES Registry Identity

NPI1144845900
Entity TypeIndividualFemale
Primary Taxonomy207X00000X
Provider Legal NameALEXANDRA ERNSTCredential: MD, MPH
Location Address9200 W WISCONSIN AVEMilwaukee, WI 53226-3522
Mailing Address9200 W Wisconsin AveMilwaukee, WI 53226-3522 · (414) 805-7400 · Fax (414) 805-7388
Fax(414) 805-7388
Sole ProprietorNo
Medical School CMSEmory University School Of MedicineGraduated 2020
Enumeration DateJune 8, 2020
Last NPPES UpdateSeptember 30, 20265 updates tracked since enumeration
NPPES CertifiedSeptember 30, 2026
✔ NPI 1144845900 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyOrthopaedic SurgeryAllopathic & Osteopathic Physicians
Taxonomy Code207X00000X
Licenses✔ Licensed in WI · 87965-020✔ Licensed in CA · A204267
Definition
An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.
Also ListedOrthopaedic Surgery · Foot and Ankle SurgeryTaxonomy 207XX0004X · License A204267 (CA)
9200 W WISCONSIN AVE, Milwaukee, WI 53226

Other Identifiers 1

Medicaid1144845900WI

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alexandra Ernst Md, Mph 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.

PECOS PAC ID2961828736
PECOS Enrollment IDI20250909001987, I20260107003128
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.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Renown Regional Medical Center

Acute Care Hospitals · Reno, NV
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number290001
Location1155 Mill StreetReno, NV 89502 · Washoe County
Emergency services Birthing friendly

Physician 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.

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
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
Most-billed visit code 99213
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.

Advanced Practice Midwife
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Internal Medicine (Gastroenterology)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Emergency Medicine
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Nurse Practitioner (Pediatrics)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Nurse Practitioner (Adult Health)
9200 W WISCONSIN AVE, DEPT OF INTERNAL MEDICINE
MILWAUKEE, WI 53226
Nurse Practitioner (Adult Health)
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Nurse Anesthetist, Certified Registered
9200 W WISCONSIN AVE
MILWAUKEE, WI 53226
Physician Assistant (Medical)
9200 W WISCONSIN AVE, INTERNAL MEDICINE
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 Alexandra Ernst's NPI number?

The NPI number for Alexandra Ernst is 1144845900. It was assigned to this individual provider in the NPPES registry on June 8, 2020.

Where is Alexandra Ernst located?

Alexandra Ernst practices at 9200 W Wisconsin Ave, Milwaukee, WI 53226. The listed phone number is (414) 805-7400.

What is Alexandra Ernst's specialty?

The primary specialty registered for this NPI is Orthopaedic Surgery with taxonomy code 207X00000X.

Is Alexandra Ernst enrolled in Medicare?

Yes. Alexandra Ernst 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.

Is Alexandra Ernst affiliated with any hospitals?

According to CMS data, Alexandra Ernst is affiliated with Renown Regional Medical Center.

When was this NPI record last updated?

The NPPES record for Alexandra Ernst was last updated on September 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 days 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.