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DR. LAUREN MARISSA REILLY M.D.
NPI 1639583586
Anesthesiology in Chicago, IL

Active since June 19, 2014PECOS EnrolledAccepts Medicare Assignment
1936 N CLARK ST APT 728, CHICAGO, IL 60614(239) 290-2739 Get Directions Write a Review

NPPES record last updated: May 8, 2023. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 8, 2023, May 4, 2023, Jun 29, 2018 (3 updates tracked since 2018).

About Dr. Lauren Marissa Reilly M.d. NPPES

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

DR. LAUREN MARISSA REILLY M.D. (NPI 1639583586) is an individual anesthesiology provider in Chicago, Illinois, licensed in Illinois (125065474) and active in the NPI registry since June 2014. She is enrolled in Medicare PECOS, is affiliated with Froedtert Memorial Lutheran Hospital, and is a graduate of Northwestern University Feinberg Medical School (2014).

NPPES Registry Identity

NPI1639583586
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDR. LAUREN MARISSA REILLYCredential: M.D.
Location Address1936 N CLARK ST APT 728Chicago, IL 60614
Mailing Address1936 N Clark St, Apt 728Chicago, IL 60614-5454 · (239) 290-2739
Phone(239) 290-2739
Sole ProprietorNo
Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2014
Enumeration DateJune 19, 2014
Last NPPES UpdateMay 8, 20233 updates tracked since enumeration
NPPES CertifiedMay 8, 2023
✔ NPI 1639583586 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in IL · 125065474✔ Licensed in WI · 70260
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.
1936 N CLARK ST APT 728, Chicago, IL 60614
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Other Identifiers 1

Medicaid1639583586WI

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. Lauren Marissa Reilly 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 ID3870888480
PECOS Enrollment IDI20190123000071
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

4

Medicare enrollment records show Lauren Reilly reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

The Medical College Of Wisconsin, Inc.
80 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
Mercy Health System Corporation
89 mi
Multi-Specialty
580 N WASHINGTON ST
Janesville, WI 53548
  • Reassigned Medicare billing, Wisconsin enrollment
  • 1,155 clinicians in this Medicare group
NPI 1598718603 (608) 741-7630
Mchs Hospitals, Inc.
200 mi
Mental Health (Including Community Mental Health Center)
2450 VINEYARD DR
Plover, WI 54467
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,476 clinicians in this Medicare group
NPI 1386249894 (715) 342-0290
Marshfield Clinic Inc
229 mi
Clinic/Center
1000 N OAK AVE
Marshfield, WI 54449
  • Reassigned Medicare billing, Wisconsin enrollment
  • 2,540 clinicians in this Medicare group
NPI 1952347981 (715) 387-5511

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 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.

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.
49 services48 patients
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.
32 services32 patients

Hospital Affiliations CMS Care Compare

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

Froedtert Memorial Lutheran Hospital

Acute Care Hospitals · Milwaukee, WI
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520177
Location9200 W Wisconsin AveMilwaukee, WI 53226 · Milwaukee County
Emergency services Birthing friendly

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 Lauren Reilly's NPI number?

The NPI number for Lauren Reilly is 1639583586. It was assigned to this individual provider in the NPPES registry on June 19, 2014.

Where is Lauren Reilly located?

Lauren Reilly practices at 1936 N Clark St Apt 728, Chicago, IL 60614. The listed phone number is (239) 290-2739.

What is Lauren Reilly's specialty?

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

Is Lauren Reilly enrolled in Medicare?

Yes. Lauren Reilly 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 Lauren Reilly's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lauren Reilly reassigns Medicare benefits to 4 organizations: The Medical College Of Wisconsin, Inc. (Milwaukee, WI), Mercy Health System Corporation (Janesville, WI), Mchs Hospitals, Inc. (Plover, WI) and Marshfield Clinic Inc (Marshfield, WI). 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 Lauren Reilly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Lauren Reilly accept?

Health plans from Anthem Blue Cross and Blue Shield list Lauren Reilly 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 Lauren Reilly affiliated with any hospitals?

According to CMS data, Lauren Reilly is affiliated with Froedtert Memorial Lutheran Hospital.

When was this NPI record last updated?

The NPPES record for Lauren Reilly was last updated on May 8, 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.