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DIARMUID A O'NEILL MD
NPI 1750460424
Anesthesiology in Marshfield, WI

Active since November 03, 2006PECOS EnrolledAccepts Medicare Assignment
78.85/100
CMS Quality Rating
1000 N OAK AVE, MARSHFIELD, WI 54449(715) 387-7179 Get Directions Write a Review

NPPES record last updated: February 13, 2023. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Feb 13, 2023, Dec 7, 2021 (2 updates tracked since 2021).

About Diarmuid A O'neill Md NPPES

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

DIARMUID A O'NEILL MD (NPI 1750460424) is an individual anesthesiology provider in Marshfield, Wisconsin, licensed in Wisconsin (39422) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Marshfield Medical Center, and is a graduate of Other (1987).

NPPES Registry Identity

NPI1750460424
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDIARMUID A O'NEILLCredential: MD
Location Address1000 N OAK AVEMarshfield, WI 54449-5703
Mailing Address1000 N Oak AveMarshfield, WI 54449-5703 · (715) 387-5511
Phone(715) 387-7179
Sole ProprietorNo
Medical School CMSOtherGraduated 1987
Enumeration DateNovember 3, 2006
Last NPPES UpdateFebruary 13, 20232 updates tracked since enumeration
NPPES CertifiedFebruary 13, 2023
✔ NPI 1750460424 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in WI · 39422
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.
1000 N OAK AVE, Marshfield, WI 54449
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Other Identifiers 1

Medicaid32385700WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Medica, Sanford Health Plan.Insurance ›

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

Diarmuid A O'neill Md 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 ID446445167
PECOS Enrollment IDI20101108001076
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.

Areas of Expertise CMS Part B claims

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.

Insertion of artery tube for blood sampling or infusion through skin 36620
This procedure involves placing a small tube into an artery, usually in the wrist or elbow, to collect blood samples or administer medication. It's done under local anesthesia and is a common, safe practice.
16 services16 patients

Hospital Affiliations CMS Care Compare

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

Marshfield Medical Center

Acute Care Hospitals · Marshfield, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520037
Location611 St Joseph AveMarshfield, WI 54449 · Wood County
Emergency services Birthing friendly

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.

78.85/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality66.68
Promoting Interoperability99
Improvement Activities40
Cost54.87

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.

ALISON RAE SAMPSON D.O.
Obstetrics & Gynecology
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5161
TAMARA L. LEAHY NP
Nurse Practitioner
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (800) 782-8581
SAMANTHA ELAINE MOORE RD, CD, CDCES
Dietitian, Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-7464
EUGENE H. LARSON PA
Physician Assistant
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5245
JAMES SKIBBA CRNA
Nurse Anesthetist, Certified Registered
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-7179
KENNETH E ENGELHART MD
Internal Medicine
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5704
KRISTIN M GERNDT MD
Radiology (Vascular & Interventional Radiology)
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 389-3474
VIRGINIA WOOLWORTH NP
Nurse Practitioner
1000 N OAK AVE
MARSHFIELD, WI 54449
Wood County (715) 387-5558

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 Diarmuid O'neill's NPI number?

The NPI number for Diarmuid O'neill is 1750460424. It was assigned to this individual provider in the NPPES registry on November 3, 2006.

Where is Diarmuid O'neill located?

Diarmuid O'neill practices at 1000 N Oak Ave, Marshfield, WI 54449. The listed phone number is (715) 387-7179.

What is Diarmuid O'neill's specialty?

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

Is Diarmuid O'neill enrolled in Medicare?

Yes. Diarmuid O'neill 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.

What insurance does Diarmuid O'neill accept?

Health plans from Medica and Sanford Health Plan list Diarmuid O'neill 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 Diarmuid O'neill affiliated with any hospitals?

According to CMS data, Diarmuid O'neill is affiliated with Marshfield Medical Center.

When was this NPI record last updated?

The NPPES record for Diarmuid O'neill was last updated on February 13, 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.