MICHAEL P O'BRIEN M.D.
NPI 1194777888
Radiology - Diagnostic Radiology in Waukesha, WI

Q: What is Michael O'brien's NPI number?

The NPI number for Michael O'brien is 1194777888. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Q: What is Michael O'brien's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Q: When was this NPI record last updated?

The NPPES record for Michael O'brien was last updated on December 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.

Active since May 17, 2006PECOS EnrolledAccepts Medicare Assignment

W231N1440 CORPORATE CT, WAUKESHA, WI 53186(262) 896-6000 Get Directions Write a Review

NPPES record last updated: December 30, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 30, 2024, Nov 17, 2023, Feb 18, 2020 (3 updates tracked since 2020).

On this page

About Michael P O'brien M.d. NPPES

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

MICHAEL P O'BRIEN M.D. (NPI 1194777888) is an individual diagnostic radiology provider in Waukesha, Wisconsin, licensed in Wisconsin (48359) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Aurora Medical Ctr Washington County, and maintains a secondary practice location in Mequon.

NPPES Registry Identity

NPI1194777888

Entity TypeIndividualMale

Primary Taxonomy2085R0202X

Provider Legal NameMICHAEL P O'BRIENCredential: M.D.

Location AddressW231N1440 CORPORATE CTWaukesha, WI 53186-1303

Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250

Phone(262) 896-6000

Sole ProprietorNo

Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2004

Enumeration DateMay 17, 2006

Last NPPES UpdateDecember 30, 20243 updates tracked since enumeration

NPPES CertifiedDecember 30, 2024

✔ NPI 1194777888 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · Diagnostic RadiologyAllopathic & Osteopathic Physicians

Taxonomy Code2085R0202X

License✔ Licensed in WI · 48359

Definition

A radiologist who utilizes x-ray, radionuclides, ultrasound and electromagnetic radiation to diagnose and treat disease.

W231N1440 CORPORATE CT, Waukesha, WI 53186

Open in Google Maps ↗

Secondary Practice Location 1

Location 110945 N Port Washington Rd Ste 201Mequon, WI 53092-5078 · Phone (262) 292-3151

Other Identifiers 1

Medicaid34967100WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare).Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Michael P O'brien M.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 ID1850477423

PECOS Enrollment IDI20080324000106

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.

Medicare Billing Reassignments

Medicare enrollment records show Michael O'brien reassigns Medicare billing to 13 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Aurora Medical Group, Inc.

10 mi

Obstetrics & Gynecology

8905 W LINCOLN AVE, SUITE 515
West Allis, WI 53227

Reassigned Medicare billing, Wisconsin enrollment
4,609 clinicians in this Medicare group

NPI 1457592735 (414) 328-8650

Aurora Advanced Healthcare, Inc.

15 mi

Family Medicine

3003 W GOOD HOPE RD
Milwaukee, WI 53209

Reassigned Medicare billing, Wisconsin enrollment
1,615 clinicians in this Medicare group

NPI 1265629133 (414) 352-3100

Columbia St. Mary's Hospital Milwaukee, Inc

16 mi

Multi-Specialty

6900 N PORT WASHINGTON RD
Glendale, WI 53217

Reassigned Medicare billing, Wisconsin enrollment
Medicare enrollment name: Columbia St Marys Hospital Milwaukee Inc
856 clinicians in this Medicare group

NPI 1215945456 (414) 270-8100

Lakeshore Medical Clinic, LLC

18 mi

Family Medicine

2000 E LAYTON AVE STE 100
Saint Francis, WI 53235

Reassigned Medicare billing, Wisconsin enrollment
960 clinicians in this Medicare group

NPI 1003861188 (414) 744-6589

Precision Radiology - Illinois Ltd

18 mi

Specialist

10945 N PORT WASHINGTON RD STE 201
Mequon, WI 53092

Reassigned Medicare billing, Wisconsin enrollment
43 clinicians in this Medicare group

NPI 1265156640 (262) 292-3151

Wisconsin Radiology Specialists, S C

19 mi

Specialist

10945 N PORT WASHINGTON RD STE 201
Mequon, WI 53092

Reassigned Medicare billing, Wisconsin enrollment
Medicare enrollment name: Premier Radiology Wisconsin LLC
237 clinicians in this Medicare group

NPI 1568446003 (262) 292-3151

Wisconsin Radiology Specialists, S C

19 mi

Specialist

10945 N PORT WASHINGTON RD STE 201
Mequon, WI 53092

Reassigned Medicare billing, Wisconsin enrollment
44 clinicians in this Medicare group

NPI 1568446003 (262) 292-3151

Mercy Health System Corporation

49 mi

Mental Health (Including Community Mental Health Center)

903 MINERAL POINT AVE
Janesville, WI 53548

Reassigned Medicare billing, Wisconsin enrollment
1,155 clinicians in this Medicare group

NPI 1669685129 (608) 756-5555

Amg Illinois Ltd

50 mi

Internal Medicine

45 TOWER CT, SUITE C
Gurnee, IL 60031

Reassigned Medicare billing, Illinois enrollment
62 clinicians in this Medicare group

NPI 1972741759 (847) 623-3200

University Of Wisconsin Medical Foundation, Inc

66 mi

Multi-Specialty

7974 UW HEALTH COURT
Middleton, WI 53562

Reassigned Medicare billing, Wisconsin enrollment
2,832 clinicians in this Medicare group

NPI 1598784555 (608) 829-5485

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 46

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.

X-ray of chest, 1 view 71045

A chest X-ray, 1 view, is a quick, painless test that produces images of the structures within your chest, such as your heart, lungs, and blood vessels. It helps in diagnosing conditions like pneumonia, heart problems, or lung cancer. You'll stand in front of a machine that emits X-rays, which pass through your body to create the image.

292 services278 patients

Ct scan head or brain without contrast 70450

A CT scan of the head or brain without contrast is a non-invasive imaging procedure. It uses X-rays to create detailed pictures of your brain, skull, and other structures inside your head. It helps to detect conditions like strokes, tumors, or injuries. No dye (contrast) is used in this test.

131 services129 patients

Mri scan of leg joint without contrast 73721

An MRI scan of your leg joint is a non-invasive procedure that uses magnetic fields and radio waves to create detailed images of the structures within your leg. This helps doctors diagnose or monitor conditions without using contrast dye.

88 services82 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

83 services77 patients

X-ray of pelvis, 1-2 views 72170

An X-ray of the pelvis, 1-2 views, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the lower part of your torso. These images help to detect any abnormalities or injuries in your hip bones and surrounding structures.

65 services53 patients

X-ray of hip, 2-3 views 73502

An X-ray of the hip with 2-3 views is a non-invasive imaging test. It uses a small amount of radiation to produce pictures of the hip joint. These images help in diagnosing conditions like fractures, arthritis, or other abnormalities. The process is quick and painless.

64 services63 patients

Mri scan of arm joint without contrast 73221

An MRI scan of the arm joint is a non-invasive imaging procedure that uses magnetic fields and radio waves to create detailed images of the structures within your arm joint. No contrast dye is used in this process. It helps to diagnose or monitor conditions like arthritis, injuries, or infections.

61 services60 patients

Ct scan of abdomen and pelvis with contrast 74177

A CT scan of the abdomen and pelvis with contrast is an imaging procedure. A special dye, called contrast, is used to make certain areas more visible. This can help identify issues such as infections, tumors, or other abnormalities. The procedure is painless and usually takes about 30 minutes.

57 services57 patients

Ct scan of upper spine without contrast 72125

A CT scan of the upper spine without contrast is a non-invasive imaging test that uses X-rays to capture detailed images of your neck and upper back. It helps in identifying issues like fractures, tumors, or infections. No dye (contrast) is used in this scan.

47 services46 patients

X-ray of chest, 2 views 71046

A chest X-ray, 2 views, is a quick, painless test that creates pictures of the structures inside your chest, such as your heart, lungs, and blood vessels. Two different angles are used to get a comprehensive view. This helps in diagnosing conditions like pneumonia, heart problems, or lung cancer.

46 services46 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

44 services40 patients

Ct scan of leg without contrast 73700

A CT scan of the leg is a non-invasive imaging test that uses X-rays to capture detailed images of your leg's bones, muscles, and blood vessels. It doesn't use contrast dye and doesn't cause any pain. It helps in diagnosing injuries or diseases.

44 services44 patients

Mri scan of lower spinal canal without contrast 72148

An MRI scan of the lower spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to produce detailed images of your lower spine. This helps identify issues like disc problems, tumors, or nerve conditions. No dye is used.

41 services41 patients

X-ray of foot, minimum of 3 views 73630

An X-ray of the foot, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones and tissues in your foot. This helps to identify fractures, infections, or other abnormalities. Multiple views ensure a comprehensive examination.

36 services34 patients

Ct scan of chest without contrast 71250

A CT scan of the chest without contrast is a non-invasive imaging procedure. It uses special X-ray equipment to produce detailed images of your chest area, including your lungs and heart. It can help diagnose conditions such as lung diseases or heart disorders. It doesn't involve any dyes or contrast agents.

34 services33 patients

X-ray of abdomen, 1 view 74018

An X-ray of the abdomen, 1 view, is a quick and painless imaging test. It uses a small amount of radiation to produce images of the structures in your abdomen, such as the stomach, liver, and intestines. This can help identify issues like blockages, infections, or injuries.

33 services30 patients

Ct scan of abdomen and pelvis without contrast 74176

A CT scan of the abdomen and pelvis is a non-invasive medical test. It uses special X-ray equipment to create detailed images of your abdominal and pelvic areas. This helps doctors examine organs, tissues, and vessels. No contrast dye is used in this procedure.

33 services33 patients

X-ray of lower and sacral spine, 2-3 views 72100

An X-ray of the lower and sacral spine involves capturing images of your lower back area, including the tailbone. This procedure helps in identifying problems like fractures, infections, or deformities. 2-3 different angle views provide a comprehensive picture.

30 services27 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

30 services27 patients

Ct scan of blood vessels of chest with contrast 71275

A CT scan of the chest with contrast is a non-invasive imaging test. It uses X-rays and a special dye to get detailed images of your blood vessels in the chest. This helps in diagnosing conditions related to heart and lungs.

29 services29 patients

X-ray of foot, minimum of 3 views 73630

27 services22 patients

Ct scan of arm without contrast 73200

A CT scan of the arm without contrast is a non-invasive imaging test. It uses X-ray technology to capture detailed images of your arm's structures. It doesn't involve any contrasting dye, hence, minimal preparation is required. It helps in diagnosing injuries or conditions affecting the arm.

26 services26 patients

Mri scan of leg joint without contrast 73721

26 services24 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

24 services18 patients

X-ray of shoulder, 1 view 73020

An X-ray of the shoulder, 1 view, is a quick, painless test that produces images of the bones and tissues within your shoulder. It helps diagnose conditions such as fractures, infections, or arthritis. You'll be positioned to capture the best view, then a small dose of radiation creates the image.

21 services20 patients

X-ray of lower leg, 2 views 73590

An X-ray of the lower leg, 2 views, is a quick, painless test that produces images of the bones in your lower leg. It helps to identify fractures, infections, or diseases. Two different angles are used to provide a comprehensive view of the leg's structure.

20 services16 patients

Ultrasound study of one arm or leg veins with compression and maneuvers 93971

This is a non-invasive procedure using sound waves to visualize veins in an arm or leg. It involves applying gentle pressure and performing certain movements. It helps identify any abnormal blood flow or clots, ensuring vascular health.

20 services20 patients

Ct scan of chest with contrast 71260

A CT scan of the chest with contrast is an imaging procedure. A special dye (contrast) is used to highlight specific areas in your body, providing clearer pictures of your chest. This helps in diagnosing conditions related to your lungs, heart, and other chest structures.

19 services19 patients

Mri scan of leg without contrast 73718

An MRI scan of the leg without contrast is a non-invasive imaging procedure. It uses a magnetic field and radio waves to create detailed images of the structures in your leg, such as bones, muscles, and blood vessels. No contrast dye is used.

19 services19 patients

3d radiographic procedure with computerized image postprocessing 76377

A 3D radiographic procedure with computerized image postprocessing is a high-tech imaging test. It uses X-rays to create detailed 3D images of the body. The computerized postprocessing further enhances these images for more precise diagnosis and treatment planning.

19 services18 patients

X-ray of hip, 1 view 73501

An X-ray of the hip, 1 view, is a quick, painless test where a small amount of radiation is used to produce images of the hip joint. This helps in diagnosing conditions like arthritis or fractures. You'll be positioned so that the X-ray machine can capture the best image of your hip.

18 services18 patients

X-ray of ankle, minimum of 3 views 73610

An ankle X-ray is a quick, painless imaging test. It involves capturing at least three different images or 'views' of your ankle using small amounts of radiation. These images help identify any abnormalities or injuries, such as fractures or arthritis.

17 services17 patients

Mri scan of upper spinal canal without contrast 72141

An MRI scan of the upper spinal canal without contrast is a non-invasive imaging test. It uses a magnetic field and radio waves to create detailed images of your upper spine. This helps doctors identify issues such as injuries, infections or diseases. No dye is used.

16 services16 patients

X-ray of elbow, minimum of 3 views 73080

An elbow X-ray with a minimum of 3 views is a non-invasive imaging test. It helps visualize the bones of the elbow from different angles. This aids in diagnosing conditions like fractures or arthritis. The procedure is quick, painless, and usually takes around 15 minutes.

15 services14 patients

Mri scan of leg before and after contrast 73720

An MRI scan of the leg involves using a magnetic field and radio waves to create detailed images of the structures within your leg. Initially, images are taken without a contrast agent. Then, a contrast agent is injected into your body to enhance the images, highlighting certain areas for closer examination.

15 services13 patients

Imaging for evaluation of swallowing function 74230

This process, known as a swallowing study, uses imaging technology to view how food and liquid move from your mouth to your stomach. It helps identify any issues you may have swallowing, which can be crucial for determining the best treatment plan.

15 services15 patients

Complete ultrasound scan behind abdominal cavity 76770

A complete ultrasound scan behind the abdominal cavity is a non-invasive imaging procedure. It uses sound waves to create pictures of the structures and organs located at the back of your abdomen. It helps in diagnosing health conditions and monitoring ongoing treatments.

15 services15 patients

X-ray of spine, 1 view 72020

An X-ray of the spine, 1 view, is a quick and painless imaging procedure. It uses radiation to capture images of the bones in your spine. It helps in detecting issues like fractures, infections, or tumors. You'll be positioned, the machine captures the image, and you're done. It's a safe, routine procedure.

14 services13 patients

Ct scan of lower spine without contrast 72131

A CT scan of the lower spine without contrast is a non-invasive imaging test. It uses X-rays to create detailed images of your lower back area, helping to detect conditions like fractures, infections, or tumors. It's painless and generally quick.

14 services14 patients

X-ray of thigh bone, minimum 2 views 73552

An X-ray of the thigh bone is a non-invasive imaging test. It involves passing a small amount of radiation through the thigh to produce images of the bone structure. At least two different angles are captured for a comprehensive view. This helps detect fractures, infections, or other abnormalities.

13 services13 patients

X-ray of ankle, minimum of 3 views 73610

13 services11 patients

X-ray of hand, minimum of 3 views 73130

An X-ray of the hand, minimum of 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the bones in your hand from different angles. This helps in diagnosing fractures, infections, arthritis, or other abnormalities. It's quick and painless.

12 services11 patients

X-ray of ribs on side of body, minimum of 3 views 71101

This is a diagnostic procedure where a machine emits a small amount of radiation to capture images of your ribs from at least three different angles. It helps to identify issues like fractures or infections. It's a quick, painless process.

11 services11 patients

Ct scan of pelvis without contrast 72192

A CT scan of the pelvis without contrast is a non-invasive imaging test. It uses X-rays to create detailed pictures of your lower abdomen area. It helps in detecting issues like injuries, inflammation, or abnormal growths. It doesn't involve any dye injection.

11 services11 patients

Limited ultrasound scan of abdomen 76705

A limited ultrasound scan of the abdomen is a non-invasive imaging test. It uses sound waves to produce images of the abdominal organs such as the liver, gallbladder, spleen, pancreas, and kidneys. This helps to identify any abnormalities or issues.

11 services11 patients

Dxa bone density measurement of hip, pelvis, spine 77080

A DXA bone density measurement is a simple, quick, and non-invasive procedure that assesses the strength of your bones. This test uses X-rays to measure the amount of minerals, mainly calcium, in the hip, pelvis, and spine. It helps in early detection of osteoporosis or other bone diseases.

11 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Aurora Medical Ctr Washington County

Acute Care Hospitals · Hartford, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520038

Location1032 E Sumner StHartford, WI 53027 · Washington County

Emergency services

Aurora St Lukes Medical Center

Acute Care Hospitals · Milwaukee, WI

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520138

Location2900 W Oklahoma AveMilwaukee, WI 53215 · Milwaukee County

Emergency services Birthing friendly

West Allis Memorial Hospital

Acute Care Hospitals · West Allis, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520139

Location8901 W Lincoln AveWest Allis, WI 53227 · Milwaukee County

Emergency services Birthing friendly

Aurora Medical Center Kenosha

Acute Care Hospitals · Kenosha, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520189

Location10400 75th StKenosha, WI 53142 · Kenosha County

Emergency services Birthing friendly

Aurora Medical Center

Acute Care Hospitals · Grafton, WI

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520207

Location975 Port Washington RoadGrafton, WI 53024 · Ozaukee County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53186 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.

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.

Reported Quality Measures

Nuclear Medicine: Correlation with Existing Imaging Studies for All Patients Undergoing Bone Scintigraphy

Percentage of final reports for all patients, regardless of age, undergoing bone scintigraphy that include physician documentation of correlation with existing relevant imaging studies (e.g., x-ray, MRI, CT, etc.) that were performed

100%29 patients

Radiation Consideration for Adult CT: Utilization of Dose Lowering Techniques

Percentage of final reports for patients aged 18 years and older undergoing CT with documentation that one or more of the following dose reduction techniques were used: - Automated exposure control - Adjustment of the mA and/or kV according to patient size -…

99%568 patients

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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.

RENELLE L STAUS NP

Nurse Practitioner

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6000

DR. MARC A BURRELL M.D.

Radiology (Vascular & Interventional Radiology)

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6000

DIGESTIVE DISEASE SPECIALISTS OF WI

Specialist

W231N1440 CORPORATE CT, SUITE 307
WAUKESHA, WI 53186

Waukesha County (262) 896-6400

YASMIN K BHATHENA MD

Pediatrics

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6000

DR. LUCELINA BADURA NP-C

Nurse Practitioner

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6030

MS. DEBRA MERKT OT

Occupational Therapist

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6045

ANJOO M GHARIA DO

Family Medicine

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6000

JOSEPH W SHEA MD

Obstetrics & Gynecology

W231N1440 CORPORATE CT
WAUKESHA, WI 53186

Waukesha County (262) 896-6000

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 Michael O'brien's NPI number?

The NPI number for Michael O'brien is 1194777888. It was assigned to this individual provider in the NPPES registry on May 17, 2006.

Where is Michael O'brien located?

Michael O'brien practices at W231n1440 Corporate Ct, Waukesha, WI 53186. The listed phone number is (262) 896-6000.

What is Michael O'brien's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.

Is Michael O'brien enrolled in Medicare?

Yes. Michael O'brien 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.

Which organizations bill Medicare for Michael O'brien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael O'brien reassigns Medicare benefits to 13 organizations: Aurora Medical Group, Inc. (West Allis, WI), Aurora Advanced Healthcare, Inc. (Milwaukee, WI), Columbia St. Mary's Hospital Milwaukee, Inc (Glendale, WI), Lakeshore Medical Clinic, LLC (Saint Francis, WI), Precision Radiology - Illinois Ltd (Mequon, WI) and 8 more organizations, listed in the Medicare section above. Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael O'brien's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael O'brien accept?

Health plans from CareSource (Common Ground Healthcare) list Michael O'brien 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 Michael O'brien affiliated with any hospitals?

According to CMS data, Michael O'brien is affiliated with Aurora Medical Ctr Washington County, Aurora St Lukes Medical Center, West Allis Memorial Hospital, Aurora Medical Center Kenosha and Aurora Medical Center.

When was this NPI record last updated?

The NPPES record for Michael O'brien was last updated on December 30, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.