DR. CAITLIN ELIZABETH POLLEY LASSUS M.D.
NPI 1891007696
Family Medicine in Chicago, IL
About Dr. Caitlin Elizabeth Polley Lassus M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CAITLIN ELIZABETH POLLEY LASSUS M.D. (NPI 1891007696) is an individual family medicine provider in Chicago, Illinois, licensed in Illinois (036135716) and active in the NPI registry since July 2010. She is enrolled in Medicare PECOS and is a graduate of Perelman School Of Med At The University Of Pennsylvania (2010).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Accepted 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
Dr. Caitlin Elizabeth Polley Lassus M.d. 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.
Medicare Billing Reassignment
Medicare enrollment records show Caitlin Lassus reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chicago, IL 60625
- Reassigned Medicare billing, Illinois enrollment
- 383 clinicians in this Medicare group
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 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.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
CHICAGO, IL 60625
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 Caitlin Lassus's NPI number?
The NPI number for Caitlin Lassus is 1891007696. It was assigned to this individual provider in the NPPES registry on July 8, 2010. The provider is also known as Caitlin Elizabeth Polley.
Where is Caitlin Lassus located?
Caitlin Lassus practices at 4747 N Kedzie Ave, Chicago, IL 60625. The listed phone number is (312) 666-3494.
What is Caitlin Lassus's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Caitlin Lassus enrolled in Medicare?
Yes. Caitlin Lassus 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 Caitlin Lassus's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Caitlin Lassus reassigns Medicare benefits to Erie Family Health Center, 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 Caitlin Lassus's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Caitlin Lassus accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Caitlin Lassus 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 Caitlin 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.
# Dr. Caitlin Elizabeth Polley Lassus, M.D. · NPI 1891007696
Family Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since July 8, 2010.
## Identity
- **NPI:** 1891007696 (Entity type: Individual)
- **Enumerated:** July 8, 2010
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 036135716 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4747 N KEDZIE AVE, Chicago, IL 60625-4420
- **Phone:** (312) 666-3494
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Erie Family Health Center, Inc (NPI 1952598468, Chicago, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Perelman School Of Med At The University Of Pennsylvania, class of 2010
## Record status
- **NPPES last updated:** August 10, 2021
---
Source: [NPI Profile](https://npiprofile.com/npi/1891007696) · Data from the CMS NPPES public registry.