1. Home
  2. Directory
  3. Illinois
  4. Oak Park
  5. Social Worker
  6. NPI Profile

MR. MARQUES COSBY SR. LCSW
NPI 1619625795
Social Worker - Clinical in Oak Park, IL

Active since March 16, 2022PECOS EnrolledAccepts Medicare Assignment
18 CHICAGO AVE, OAK PARK, IL 60302(773) 253-3933 Get Directions Write a Review

NPPES record last updated: June 20, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 20, 2025, Sep 16, 2024 (2 updates tracked since 2024).

About Mr. Marques Cosby Sr. Lcsw NPPES

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

MR. MARQUES COSBY SR. LCSW (NPI 1619625795) is an individual clinical provider in Oak Park, Illinois, licensed in Illinois (149.027563) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of Other (2020).

NPPES Registry Identity

NPI1619625795
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameMR. MARQUES COSBY SR.Credential: LCSW
Location Address18 CHICAGO AVEOak Park, IL 60302-2402
Mailing AddressPo Box 746715Atlanta, GA 30374-6715 · (773) 352-1515 · Fax (312) 929-0373
Phone(773) 253-3933
Sole ProprietorNo
Medical School CMSOtherGraduated 2020
Enumeration DateMarch 16, 2022
Last NPPES UpdateJune 20, 20252 updates tracked since enumeration
NPPES CertifiedJune 20, 2025
✔ NPI 1619625795 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySocial Worker · ClinicalBehavioral Health & Social Service Providers
Taxonomy Code1041C0700X
License✔ Licensed in IL · 149.027563
Definition
A social worker who holds a master's or doctoral degree in social work from an accredited school of social work in addition to at least two years of post-master's supervised experience in a clinical setting. The social worker must be licensed, certified, or registered at the clinical level in the jurisdiction of practice. A clinical social worker provides direct services, including interventions focused on interpersonal interactions, intrapsychic dynamics, and life management issues. Clinical social work services are based on bio-psychosocial perspectives. Services consist of assessment, diagnosis, treatment (including psychotherapy and counseling), client-centered advocacy, consultation, evaluation, and prevention of mental illness, emotional, or behavioral disturbances.
18 CHICAGO AVE, Oak Park, IL 60302
Open in Google Maps ↗

Secondary Practice Location 1

Location 110027 S Maplewood AveChicago, IL 60655-1058 · Phone (312) 478-6721

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Health, UnitedHealthcare.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

Mr. Marques Cosby Sr. Lcsw 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 ID5890225460
PECOS Enrollment IDI20250212000333
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 Reassignment

Medicare enrollment records show Marques Cosby reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Oak Street Health Physicians Group, PC
16 mi
Primary Care
1715 E 95TH ST
Chicago, IL 60617
  • Reassigned Medicare billing, Illinois enrollment
  • 343 clinicians in this Medicare group
NPI 1083051643 (773) 768-4437

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60302 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
$0.00 typical visit price
range $60.08 – $183.39
Typical copayment $0.00 (range $15.02 – $45.84)
Most-billed visit code NA
Established Patient
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
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 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARCOS ERAZO MSW
Social Worker (Clinical)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
DR. TODD M MACK D.P.M.
Podiatrist (Foot & Ankle Surgery)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
SHUYING CHANG NP
Nurse Practitioner (Family)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
MR. JORDAN R KELLER FNP-BC
Nurse Practitioner (Family)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
MARY CAITLIN SCHANTZ NP
Nurse Practitioner (Family)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
MRS. DEHEDGRA IDOWU AGPCNP-BC
Nurse Practitioner (Gerontology)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
MS. ASHLEY ELISE COHEN MSN, APRN, FNP-C
Nurse Practitioner (Family)
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933
DR. AMBA AYLOO M.D.
Family Medicine
18 CHICAGO AVE
OAK PARK, IL 60302
Cook County (773) 253-3933

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 Marques Cosby's NPI number?

The NPI number for Marques Cosby is 1619625795. It was assigned to this individual provider in the NPPES registry on March 16, 2022.

Where is Marques Cosby located?

Marques Cosby practices at 18 Chicago Ave, Oak Park, IL 60302. The listed phone number is (773) 253-3933.

What is Marques Cosby's specialty?

The primary specialty registered for this NPI is Social Worker, specializing in Clinical, with taxonomy code 1041C0700X.

Is Marques Cosby enrolled in Medicare?

Yes. Marques Cosby 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 organization bills Medicare for Marques Cosby's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marques Cosby reassigns Medicare benefits to Oak Street Health Physicians Group, PC (Chicago, IL). The 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 Marques Cosby's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Marques Cosby accept?

Health plans from Oscar Health and UnitedHealthcare list Marques Cosby 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.

When was this NPI record last updated?

The NPPES record for Marques Cosby was last updated on June 20, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.