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LYDIA LEFFELMAN LCSW
NPI 1821882077
Social Worker - Clinical in Chicago, IL

Active since April 04, 2025PECOS EnrolledAccepts Medicare Assignment
676 N SAINT CLAIR ST STE 1100, CHICAGO, IL 60611(312) 695-5060(312) 695-5010 Get Directions Write a Review

NPPES record last updated: June 26, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Lydia Leffelman Lcsw NPPES

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

LYDIA LEFFELMAN LCSW (NPI 1821882077) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149022062) and active in the NPI registry since April 2025. She is enrolled in Medicare PECOS and is a graduate of Loyola University Of Chicago, Stritch School Of Medicine (2017).

NPPES Registry Identity

NPI1821882077
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameLYDIA LEFFELMANCredential: LCSW
Location Address676 N SAINT CLAIR ST STE 1100Chicago, IL 60611-2954
Mailing Address676 N Saint Clair St Ste 1100Chicago, IL 60611-2954 · (312) 695-5060 · Fax (312) 695-5010
Phone(312) 695-5060
Fax(312) 695-5010
Sole ProprietorYes
Medical School CMSLoyola University Of Chicago, Stritch School Of MedicineGraduated 2017
Enumeration DateApril 4, 2025
Last NPPES UpdateJune 26, 2026
NPPES CertifiedJune 26, 2026
✔ NPI 1821882077 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 · 149022062
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.
676 N SAINT CLAIR ST STE 1100, Chicago, IL 60611
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Accepted Insurance

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

Lydia Leffelman 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 ID42793481
PECOS Enrollment IDI20260313000372
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

2

Medicare enrollment records show Lydia Leffelman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Advocate North Side Health Network
2.6 mi
General Acute Care Hospital
836 W WELLINGTON AVE
Chicago, IL 60657
  • Reassigned Medicare billing, Illinois enrollment
  • 19 clinicians in this Medicare group
NPI 1912014564 (773) 975-1600
Northwestern Medical Faculty Foundation
34 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

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 60611 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 20

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

GENEVA JOY STEWART APRN, CNP
Nurse Practitioner
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
SARAH LILLIAN RAZO LCSW
Social Worker (Clinical)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
ANDREW CHRISTOPHER NEW M.D.
Psychiatry & Neurology (Psychiatry)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
DR. KRISTINA JOHNSON PHD
Clinical Neuropsychologist
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
EDGAR WOZNICA M.D.
Psychiatry & Neurology (Addiction Psychiatry)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
SACHIN PATEL MD
Psychiatry & Neurology (Psychiatry)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
MICHAEL MARCANGELO
Psychiatry & Neurology (Psychiatry)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060
DR. SHAN H SIDDIQI MD
Psychiatry & Neurology (Psychiatry)
676 N SAINT CLAIR ST STE 1100
CHICAGO, IL 60611
Cook County (312) 695-5060

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 Lydia Leffelman's NPI number?

The NPI number for Lydia Leffelman is 1821882077. It was assigned to this individual provider in the NPPES registry on April 4, 2025.

Where is Lydia Leffelman located?

Lydia Leffelman practices at 676 N Saint Clair St Ste 1100, Chicago, IL 60611. The listed phone number is (312) 695-5060.

What is Lydia Leffelman's specialty?

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

Is Lydia Leffelman enrolled in Medicare?

Yes. Lydia Leffelman 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 Lydia Leffelman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Leffelman reassigns Medicare benefits to 2 organizations: Advocate North Side Health Network (Chicago, IL) and Northwestern Medical Faculty Foundation (Carol Stream, IL). 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 Lydia Leffelman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Lydia Leffelman accept?

Health plans from Oscar Health list Lydia Leffelman 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 Lydia Leffelman was last updated on June 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.