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MASON NELSON
NPI 1275233728
Physician Assistant in Oconomowoc, WI

Active since March 03, 2023PECOS Enrolled
1417 ALTIS DR UNIT 207, OCONOMOWOC, WI 53066(218) 530-0035 Get Directions Write a Review

NPPES record last updated: April 16, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 16, 2026, Sep 8, 2025, Jul 1, 2025 and 3 more (6 updates tracked since 2023).

About Mason Nelson NPPES

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

MASON NELSON (NPI 1275233728) is an individual physician assistant in Oconomowoc, Wisconsin, licensed in Wisconsin (7511) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS, is affiliated with University Of Wi Hospitals & Clinics Authority, and is a graduate of Other (2023).

NPPES Registry Identity

NPI1275233728
Entity TypeIndividualMale
Primary Taxonomy363A00000X
Provider Legal NameMASON NELSON
Location Address1417 ALTIS DR UNIT 207Oconomowoc, WI 53066-1293
Mailing Address1417 Altis Dr Unit 207Oconomowoc, WI 53066-1293
Phone(218) 530-0035
Sole ProprietorNo
Medical School CMSOtherGraduated 2023
Enumeration DateMarch 3, 2023
Last NPPES UpdateApril 16, 20266 updates tracked since enumeration
NPPES CertifiedApril 16, 2026
✔ NPI 1275233728 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in WI · 7511
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
1417 ALTIS DR UNIT 207, Oconomowoc, WI 53066
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Other Identifiers 1

Medicaid100253607WI

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mason Nelson is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6204281769
PECOS Enrollment IDI20231018002880
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.

University Of Wi Hospitals & Clinics Authority

Acute Care Hospitals · Madison, WI
4/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number520098
Location600 Highland AvenueMadison, WI 53792 · Dane County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53066 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.

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 Mason Nelson's NPI number?

The NPI number for Mason Nelson is 1275233728. It was assigned to this individual provider in the NPPES registry on March 3, 2023.

Where is Mason Nelson located?

Mason Nelson practices at 1417 Altis Dr Unit 207, Oconomowoc, WI 53066. The listed phone number is (218) 530-0035.

What is Mason Nelson's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Mason Nelson enrolled in Medicare?

Yes. Mason Nelson is registered in the Medicare PECOS enrollment system.

Is Mason Nelson affiliated with any hospitals?

According to CMS data, Mason Nelson is affiliated with University Of Wi Hospitals & Clinics Authority.

When was this NPI record last updated?

The NPPES record for Mason Nelson was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.