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MS. AMARILIS DIAZ LCSW
NPI 1356975692
Social Worker - Clinical in Chicago, IL

Active since February 25, 2020PECOS Enrolled
1731 N MARCEY ST STE 510, CHICAGO, IL 60614(773) 899-8494 Get Directions Write a Review

NPPES record last updated: August 2, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 9, 2020, Feb 25, 2020 (2 updates tracked since 2020).

About Ms. Amarilis Diaz Lcsw NPPES

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

MS. AMARILIS DIAZ LCSW (NPI 1356975692) is an individual clinical provider in Chicago, Illinois, licensed in Illinois (149021978) and active in the NPI registry since February 2020. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1356975692
Entity TypeIndividualFemale
Primary Taxonomy1041C0700X
Provider Legal NameMS. AMARILIS DIAZCredential: LCSW
Location Address1731 N MARCEY ST STE 510Chicago, IL 60614-7955
Mailing Address1920 N Lawndale AveChicago, IL 60647-3636 · (773) 899-8494
Phone(773) 899-8494
Sole ProprietorNo
Enumeration DateFebruary 25, 2020
Last NPPES UpdateAugust 2, 20252 updates tracked since enumeration
NPPES CertifiedAugust 2, 2025
✔ NPI 1356975692 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 · 149021978
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.
1731 N MARCEY ST STE 510, Chicago, IL 60614
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1Terry Hefter Associates, LLC, 1731 N. Marcey Suite 535Chicago, IL 60614 · Phone (773) 899-8494
Location 21920 N Lawndale AveChicago, IL 60647-3636 · Phone (773) 964-4667

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 (PECOS)

Ms. Amarilis Diaz Lcsw is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Amarilis Diaz reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Vitae Health Medical Illinois, PLLC
8.4 mi
Internal Medicine
3450 OAKTON ST
Skokie, IL 60076
  • Reassigned Medicare billing, Illinois enrollment
  • 491 clinicians in this Medicare group
NPI 1174013452 (224) 777-8034
Oak Street Health Physicians Group, PC
14 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 60614 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 18

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

ERIKA KOCH-WESER
Social Worker
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (630) 667-4145
AIDEN COX MSW
Social Worker (Clinical)
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (312) 618-4867
KELSEY ANN MCKAY
Marriage & Family Therapist
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (312) 618-4867
HATTIE NICHOLE HOLLAND MA, NCC, LPC
Counselor (Professional)
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (815) 641-8503
ADAM HILL
Social Worker
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (312) 618-4867
GIANNE FRANCOIS SHAH LPC, NCC
Counselor (Professional)
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (773) 240-3438
JENNIFER PAMELA BEDOY LPC
Counselor (Professional)
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (312) 618-4867
MATTHEW COLTON KEENAN
Marriage & Family Therapist
1731 N MARCEY ST STE 510
CHICAGO, IL 60614
Cook County (312) 549-8986

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 Amarilis Diaz's NPI number?

The NPI number for Amarilis Diaz is 1356975692. It was assigned to this individual provider in the NPPES registry on February 25, 2020.

Where is Amarilis Diaz located?

Amarilis Diaz practices at 1731 N Marcey St Ste 510, Chicago, IL 60614. The listed phone number is (773) 899-8494.

What is Amarilis Diaz's specialty?

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

Is Amarilis Diaz enrolled in Medicare?

Yes. Amarilis Diaz is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Amarilis Diaz's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Amarilis Diaz reassigns Medicare benefits to 2 organizations: Vitae Health Medical Illinois, PLLC (Skokie, IL) and Oak Street Health Physicians Group, PC (Chicago, 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 Amarilis Diaz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Amarilis Diaz accept?

Health plans from Oscar Health list Amarilis Diaz 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 Amarilis Diaz was last updated on August 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.