DR. MICHAEL J OLEYAR D.O.
NPI 1386969848
Anesthesiology in Chicago, IL

Q: What is Michael Oleyar's NPI number?

The NPI number for Michael Oleyar is 1386969848. It was assigned to this individual provider in the NPPES registry on March 28, 2010.

Q: What is Michael Oleyar'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 Michael Oleyar was last updated on March 24, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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 March 28, 2010PECOS EnrolledAccepts Medicare Assignment

3134 N CLARK ST, CHICAGO, IL 60657(312) 766-4949 Get Directions Write a Review

NPPES record last updated: March 24, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 24, 2025, Apr 29, 2022, Apr 19, 2022 and 3 more (6 updates tracked since 2020).

On this page

About Dr. Michael J Oleyar D.o. NPPES

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

DR. MICHAEL J OLEYAR D.O. (NPI 1386969848) is an individual anesthesiology provider in Chicago, Illinois, licensed in Wisconsin (70252) and active in the NPI registry since March 2010. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Delnor Community Hospital, and maintains a secondary practice location in Midland.

NPPES Registry Identity

NPI1386969848

Entity TypeIndividualMale

Primary Taxonomy207L00000X

Provider Legal NameDR. MICHAEL J OLEYARCredential: D.O.

Location Address3134 N CLARK STChicago, IL 60657-4414

Mailing Address29373 Network PlChicago, IL 60673-1293

Phone(312) 766-4949

Sole ProprietorNo

Medical School CMSMichigan State University College Of Osteopathic MedicineGraduated 2010

Enumeration DateMarch 28, 2010

Last NPPES UpdateMarch 24, 20256 updates tracked since enumeration

NPPES CertifiedMarch 24, 2025

✔ NPI 1386969848 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians

Taxonomy Code207L00000X

Licenses✔ Licensed in WI · 70252✔ Licensed in IL · 036150017✔ Licensed in NY · 276686

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.

3134 N CLARK ST, Chicago, IL 60657

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Secondary Practice Location 1

Location 14000 Wellness DrMidland, MI 48670-4414 · Phone (989) 839-3000

Other Identifiers 3

Medicaid1386969848MI

Medicaid100083194WI

Medicaid1386969848NV

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Dr. Michael J Oleyar D.o. 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 ID547499113

PECOS Enrollment IDI20191104001967

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 Oleyar reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Midwest Anesthesia Partners, LLC

0.9 mi

Anesthesiology

2900 N LAKE SHORE DR
Chicago, IL 60657

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

NPI 1255380184 (773) 388-5700

Endeavor Health Medical Group

8.8 mi

Allergy & Immunology

1000 CENTRAL ST
Evanston, IL 60201

Reassigned Medicare billing, Illinois enrollment
4,841 clinicians in this Medicare group

NPI 1497701882 (847) 570-5235

Northwestern Medical Faculty Foundation

32 mi

Multi-Specialty

DEPT 5777
Carol Stream, IL 60122

Reassigned Medicare billing, Illinois enrollment
4,817 clinicians in this Medicare group

NPI 1346235314 (855) 694-2866

Anesthesia Associates, Ltd

33 mi

Pain Medicine

2540 HANFORD LN
Aurora, IL 60502

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

NPI 1952308223 (815) 748-8993

The Medical College Of Wisconsin, Inc.

79 mi

Internal Medicine

8701 WATERTOWN PLANK RD
Milwaukee, WI 53226

Reassigned Medicare billing, Wisconsin enrollment
3,983 clinicians in this Medicare group

NPI 1699720086 (414) 955-7101

Edward W. Sparrow Hospital Association

169 mi

Anesthesiology

1215 E MICHIGAN AVE
Lansing, MI 48912

Reassigned Medicare billing, Michigan enrollment
265 clinicians in this Medicare group

NPI 1366498107 (517) 364-3350

Capital Area Anesthesia PC

174 mi

Pain Medicine

1749 HAMILTON RD STE 102E
Okemos, MI 48864

Reassigned Medicare billing, Michigan enrollment
90 clinicians in this Medicare group

NPI 1538105010 (517) 482-2118

Munson Healthcare Otsego Memorial Hospital

261 mi

General Acute Care Hospital

825 N CENTER AVE
Gaylord, MI 49735

Reassigned Medicare billing, Michigan enrollment
63 clinicians in this Medicare group

NPI 1124028972 (989) 731-2100

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 12

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.

Anesthesia for other procedure on large bowel using an endoscope 00811

Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.

100 services100 patients

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731

This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.

69 services67 patients

Anesthesia for lens surgery 00142

Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.

44 services43 patients

Anesthesia for procedure on small and large bowel using an endoscope 00813

Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.

29 services29 patients

Anesthesia for procedure for total knee joint replacement 01402

Anesthesia for a total knee joint replacement numbs your body to eliminate pain during surgery. This could be general anesthesia where you're unconscious, or regional anesthesia where only the leg is numb. It's administered by a specialist, ensuring safety and comfort.

24 services24 patients

Anesthesia for exam of colon using an endoscope 00812

Anesthesia for a colon examination with an endoscope is a method used to ensure comfort during the procedure. It involves administering medication to help you relax or sleep, thus reducing discomfort as the endoscope, a thin, flexible tube, is navigated through your colon.

18 services18 patients

Anesthesia for x-ray or radiation therapy 01922

Anesthesia for x-ray or radiation therapy involves administering medication to help you relax or sleep during the procedure. It's used to ensure comfort, minimize movement, and reduce anxiety. The type of anesthesia used depends on the procedure and patient's health.

17 services17 patients

Injection of anesthetic agent and/or steroid into thigh nerve (femoral nerve) 64447

This procedure involves injecting a numbing agent and/or steroid into a nerve in your thigh. It's done to alleviate pain or inflammation. A needle will be carefully positioned near the nerve, and the medicine will be administered.

14 services14 patients

Anesthesia for total hip replacement 01214

Anesthesia for total hip replacement is a medical service where medication is given to eliminate pain during surgery. Two types are commonly used: general anesthesia, making you unconscious, or spinal anesthesia, numbing the lower body. The choice depends on your health and your doctor's recommendation.

13 services13 patients

Anesthesia for other procedure or exam of knee joint using an endoscope 01400

Anesthesia for a knee joint procedure or exam using an endoscope involves administering medication to numb the area or put you in a sleep-like state. This ensures you don't feel pain during the procedure. The endoscope, a thin tube with a camera, allows the doctor to view the knee joint internally without making large incisions.

13 services13 patients

Anesthesia for procedure on nerves, muscles, tendons, and tissue of forearm, wrist, and hand 01810

Anesthesia for procedures on the forearm, wrist, and hand involves administering medication to block sensation in these areas. This helps ensure comfort and painlessness during surgeries or treatments involving nerves, muscles, tendons, and tissue in these regions.

13 services13 patients

Anesthesia for procedure on gallbladder, pancreas, or liver using an endoscope 00732

This procedure involves using an endoscope, a flexible tube with a light and camera, to examine or treat your gallbladder, pancreas, or liver. Anesthesia is administered to ensure you're comfortable and pain-free during the procedure.

11 services11 patients

Hospital Affiliations CMS Care Compare 4

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

Northwestern Medicine Delnor Community Hospital

Acute Care Hospitals · Geneva, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140211

Location300 Randall RdGeneva, IL 60134 · Kane County

Emergency services Birthing friendly

Northwest Community Hospital 1

Acute Care Hospitals · Arlington Heights, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140252

Location800 W Central RoadArlington Heights, IL 60005 · Cook County

Emergency services Birthing friendly

Mymichigan Medical Center Clare

Acute Care Hospitals · Clare, MI

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number230180

Location703 N Mcewan StClare, MI 48617 · Clare County

Mymichigan Medical Center Midland

Acute Care Hospitals · Midland, MI

4/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number230222

Location4000 Wellness DriveMidland, MI 48670 · Midland County

Birthing friendly

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.

DR. SORIN C DANCIU M.D.

Internal Medicine (Cardiovascular Disease)