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

JOHANNA ELLEFSON MD
NPI 1356283105
Anesthesiology in Madison, WI

Q: What is Johanna Ellefson's NPI number?

The NPI number for Johanna Ellefson is 1356283105. It was assigned to this individual provider in the NPPES registry on April 8, 2026.

Q: What is Johanna Ellefson's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Q: When was this NPI record last updated?

The NPPES record for Johanna Ellefson was last updated on June 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 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.

Active since April 08, 2026PECOS Enrolled

UW HOSPITALS & CLINICS 600 HIGHLAND AVE, MADISON, WI 53792(608) 263-6400 Get Directions Write a Review

NPPES record last updated: June 22, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Johanna Ellefson Md NPPES

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

JOHANNA ELLEFSON MD (NPI 1356283105) is an individual anesthesiology provider in Madison, Wisconsin, licensed in Wisconsin (102252851) and active in the NPI registry since April 2026. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1356283105

Entity TypeIndividualFemale

Primary Taxonomy207L00000X

Provider Legal NameJOHANNA ELLEFSONCredential: MD

Location AddressUW HOSPITALS & CLINICS 600 HIGHLAND AVEMadison, WI 53792-0001

Mailing AddressUw Hospitals & Clinics 600 Highland AveMadison, WI 53792-0001 · (608) 263-6400

Phone(608) 263-6400

Sole ProprietorNo

Enumeration DateApril 8, 2026

Last NPPES UpdateJune 22, 2026

NPPES CertifiedJune 22, 2026

✔ NPI 1356283105 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

License✔ Licensed in WI · 102252851

Definition

An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.

UW HOSPITALS & CLINICS 600 HIGHLAND AVE, Madison, WI 53792

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Johanna Ellefson 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.

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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.

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