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DR. DONALD BENJAMIN LASSUS MD
NPI 1124330055
Family Medicine in Chicago, IL

Active since July 08, 2010PECOS Enrolled
4747 N. KEDZIE AVENUE, CHICAGO, IL 60625(312) 666-3494(773) 267-2175 Get Directions Write a Review

NPPES record last updated: August 10, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 10, 2021, May 10, 2017 (2 updates tracked since 2017).

About Dr. Donald Benjamin Lassus Md NPPES

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

DR. DONALD BENJAMIN LASSUS MD (NPI 1124330055) is an individual family medicine provider in Chicago, Illinois, licensed in Illinois (036135721) and active in the NPI registry since July 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1124330055
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. DONALD BENJAMIN LASSUSCredential: MD
Location Address4747 N. KEDZIE AVENUEChicago, IL 60625
Mailing Address1701 W. Superior, 3rd FloorChicago, IL 60622 · (312) 666-3494 · Fax (312) 432-4354
Phone(312) 666-3494
Fax(773) 267-2175
Sole ProprietorNo
Enumeration DateJuly 8, 2010
Last NPPES UpdateAugust 10, 20212 updates tracked since enumeration
NPPES CertifiedAugust 10, 2021
✔ NPI 1124330055 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in IL · 036135721
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
4747 N. KEDZIE AVENUE, Chicago, IL 60625
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Other Identifiers 2

Other036-135721IL · Il Lic
Medicaid036135721IL

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Donald Benjamin Lassus Md 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 Donald Lassus reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Erie Family Health Center, Inc
Same address
Federally Qualified Health Center (FQHC)
4759 N KEDZIE AVE
Chicago, IL 60625
  • Reassigned Medicare billing, Illinois enrollment
  • 383 clinicians in this Medicare group
NPI 1952598468 (312) 666-3494
Cook County
4.2 mi
Primary Care
5501 W. FULLERTON AVE
Chicago, IL 60639
  • Reassigned Medicare billing, Illinois enrollment
  • 1,047 clinicians in this Medicare group
NPI 1689794489 (312) 395-7400

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.

Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
13 services13 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60625 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
$94.06 typical visit price
range $60.08 – $183.39
Typical copayment $23.51 (range $15.02 – $45.84)
Most-billed visit code 99203
Established Patient
$105.70 typical visit price
range $18.97 – $148.12
Typical copayment $26.42 (range $4.74 – $37.03)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Donald Lassus's NPI number?

The NPI number for Donald Lassus is 1124330055. It was assigned to this individual provider in the NPPES registry on July 8, 2010.

Where is Donald Lassus located?

Donald Lassus practices at 4747 N. Kedzie Avenue, Chicago, IL 60625. The listed phone number is (312) 666-3494.

What is Donald Lassus's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Donald Lassus enrolled in Medicare?

Yes. Donald Lassus is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Donald Lassus's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Donald Lassus reassigns Medicare benefits to 2 organizations: Erie Family Health Center, Inc (Chicago, IL) and Cook County (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 Donald Lassus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Donald Lassus was last updated on August 10, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.