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JOHN LUDWIG LSW
NPI 1255164455
Social Worker - Clinical in Chicago, IL

Active since August 22, 2024PECOS Enrolled
4433 N RAVENSWOOD AVE STE 210, CHICAGO, IL 60640(773) 876-8763(872) 315-3138 Get Directions Write a Review

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

Record update history: Apr 23, 2026, Aug 22, 2024 (2 updates tracked since 2024).

About John Ludwig Lsw NPPES

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

JOHN LUDWIG LSW (NPI 1255164455) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149031732) and active in the NPI registry since August 2024. He is enrolled in Medicare PECOS and is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2024).

NPPES Registry Identity

NPI1255164455
Entity TypeIndividualMale
Primary Taxonomy1041C0700X
Provider Legal NameJOHN LUDWIGCredential: LSW
Location Address4433 N RAVENSWOOD AVE STE 210Chicago, IL 60640-7755
Mailing Address4433 N Ravenswood Ave Ste 210Chicago, IL 60640-7755 · (773) 876-8763 · Fax (872) 315-3138
Phone(773) 876-8763
Fax(872) 315-3138
Sole ProprietorNo
Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 2024
Enumeration DateAugust 22, 2024
Last NPPES UpdateJune 18, 20262 updates tracked since enumeration
NPPES CertifiedJune 18, 2026
✔ NPI 1255164455 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 · 149031732
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.
4433 N RAVENSWOOD AVE STE 210, Chicago, IL 60640
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, 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 (PECOS)

John Ludwig Lsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID2163988478
PECOS Enrollment IDI20260728000469
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 John Ludwig reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Catalyst Clinical Group, Inc
Same address
Clinical
4433 N RAVENSWOOD AVE STE 210
Chicago, IL 60640
  • Reassigned Medicare billing, Illinois enrollment
  • 10 clinicians in this Medicare group
NPI 1316397979 (312) 834-5487

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 60640 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 17

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

JONATHAN HEIBERGER LPC
Counselor (Mental Health)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (773) 876-8763
MACARIOS SVOLOS LSW
Social Worker
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (773) 876-8763
ABIGAIL R COMPERNOLLE LSW
Social Worker (Clinical)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (773) 876-8763
JACOB HOSIER
Social Worker
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (773) 876-8763
CATALYST CLINICAL GROUP, INC
Social Worker (Clinical)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (312) 834-5487
EMILY GUMM MSW
Social Worker (Clinical)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (312) 448-7218
COURTENIE TACCOLINI LPC
Counselor (Mental Health)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (312) 834-5487
MR. CLAIRE E SONNE LSW
Social Worker (Clinical)
4433 N RAVENSWOOD AVE STE 210
CHICAGO, IL 60640
Cook County (312) 834-5487

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 John Ludwig's NPI number?

The NPI number for John Ludwig is 1255164455. It was assigned to this individual provider in the NPPES registry on August 22, 2024.

Where is John Ludwig located?

John Ludwig practices at 4433 N Ravenswood Ave Ste 210, Chicago, IL 60640. The listed phone number is (773) 876-8763.

What is John Ludwig's specialty?

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

Is John Ludwig enrolled in Medicare?

Yes. John Ludwig is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for John Ludwig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Ludwig reassigns Medicare benefits to Catalyst Clinical Group, Inc (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 John Ludwig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Ludwig accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list John Ludwig 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 John Ludwig was last updated on June 18, 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.