DR. SEAN MICHAEL O'NEILL M.D., PH.D.
NPI 1720421191
Surgery in Chelsea, MI

Q: What is Sean O'neill's NPI number?

The NPI number for Sean O'neill is 1720421191. It was assigned to this individual provider in the NPPES registry on April 16, 2013.

Q: What is Sean O'neill's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Sean O'neill was last updated on August 29, 2022. 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.

Active since April 16, 2013PECOS EnrolledAccepts Medicare Assignment

14650 E OLD US HIGHWAY 12, CHELSEA, MI 48118(734) 936-5738(614) 293-4030 Get Directions Write a Review

NPPES record last updated: August 29, 2022. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 29, 2022, Aug 19, 2022, Nov 16, 2020 and 2 more (5 updates tracked since 2020).

On this page

About Dr. Sean Michael O'neill M.d., Ph.d. NPPES

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

DR. SEAN MICHAEL O'NEILL M.D., PH.D. (NPI 1720421191) is an individual surgery provider in Chelsea, Michigan, licensed in Michigan (4301505237) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, is affiliated with University Of Michigan Health System, and is a graduate of Northwestern University Feinberg Medical School (2013).

NPPES Registry Identity

NPI1720421191

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameDR. SEAN MICHAEL O'NEILLCredential: M.D., PH.D.

Location Address14650 E OLD US HIGHWAY 12Chelsea, MI 48118-1801

Mailing Address3621 S State StAnn Arbor, MI 48108-1633

Phone(734) 936-5738

Fax(614) 293-4030

Sole ProprietorNo

Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2013

Enumeration DateApril 16, 2013

Last NPPES UpdateAugust 29, 20225 updates tracked since enumeration

NPPES CertifiedAugust 29, 2022

✔ NPI 1720421191 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in MI · 4301505237

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

14650 E OLD US HIGHWAY 12, Chelsea, MI 48118

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Other Identifiers 1

Medicaid0409738OH

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Buckeye Health Plan, Ambetter from Meridian, Ambetter Health and more.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

Dr. Sean Michael O'neill M.d., Ph.d. 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 ID7416242995

PECOS Enrollment IDI20220112000339

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 2

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.

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

20 services20 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

19 services19 patients

Hospital Affiliations CMS Care Compare 3

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

University Of Michigan Health System

Acute Care Hospitals · Ann Arbor, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230046

Location1500 E Medical Center Drive, Spc 5474Ann Arbor, MI 48109 · Washtenaw County

Emergency services Birthing friendly

Holland Community Hospital

Acute Care Hospitals · Holland, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230072

Location602 Michigan AveHolland, MI 49423 · Ottawa County

Emergency services Birthing friendly

Chelsea Hospital

Acute Care Hospitals · Chelsea, MI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number230259

Location775 S Main StChelsea, MI 48118 · Washtenaw County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 48118 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

$90.76 typical visit price

range $58.04 – $177.36

Typical copayment $22.69 (range $14.51 – $44.34)

Most-billed visit code 99203

Established Patient

$72.38 typical visit price

range $18.32 – $143.49

Typical copayment $18.09 (range $4.58 – $35.87)

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.

ADAM BENJAMIN AGRANOFF M.D.

Physical Medicine & Rehabilitation

14650 E OLD US HIGHWAY 12, SUITE 203
CHELSEA, MI 48118

Washtenaw County (734) 475-3923

ABIGAIL MARIE LAWINGER PA

Physician Assistant

14650 E OLD US HIGHWAY 12, SUITE 303
CHELSEA, MI 48118

Washtenaw County (734) 475-4177

DANIELLE BROOKE BERTHOLD NP

Nurse Practitioner

14650 E OLD US HIGHWAY 12, SUITE 303
CHELSEA, MI 48118

Washtenaw County (734) 475-4177

MAXWELL BENTLEY SARANEN PA-C

Physician Assistant

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 475-4003

CALISTA MARIE HARBAUGH MD

Colon & Rectal Surgery

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 936-5738

MEHAR KAUR BRAR PA-C

Physician Assistant

14650 E OLD US HIGHWAY 12
CHELSEA, MI 48118

Washtenaw County (734) 936-7030

FAZLEOMAR MAHMOOD MD

Internal Medicine (Rheumatology)

14650 E OLD US HIGHWAY 12, SUITE 301
CHELSEA, MI 48118

Washtenaw County (734) 593-5990

CHELSEA COMMUNITY HOSPITAL

Pharmacy (Community/Retail Pharmacy)

14650 E OLD US HIGHWAY 12, SUITE 103
CHELSEA, MI 48118

Washtenaw County (734) 593-5900

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 Sean O'neill's NPI number?

The NPI number for Sean O'neill is 1720421191. It was assigned to this individual provider in the NPPES registry on April 16, 2013.

Where is Sean O'neill located?

Sean O'neill practices at 14650 E Old Us Highway 12, Chelsea, MI 48118. The listed phone number is (734) 936-5738.

What is Sean O'neill's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Is Sean O'neill enrolled in Medicare?

Yes. Sean 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 Sean O'neill accept?

Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian, Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company and 2 other insurers list Sean 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 Sean O'neill affiliated with any hospitals?

According to CMS data, Sean O'neill is affiliated with University Of Michigan Health System, Holland Community Hospital and Chelsea Hospital.

When was this NPI record last updated?

The NPPES record for Sean O'neill was last updated on August 29, 2022. 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.