STEVEN M ZAHN M.D.
NPI 1689820409
Emergency Medicine in Chicago, IL
About Steven M Zahn M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
STEVEN M ZAHN M.D. (NPI 1689820409) is an individual emergency medicine provider in Chicago, Illinois, licensed in Illinois (036.122218) and active in the NPI registry since August 2008. He is enrolled in Medicare PECOS, is affiliated with Presence Mercy Medical Center, and is a graduate of Creighton University School Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses
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
Steven M Zahn 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 Reassignments
3Medicare enrollment records show Steven Zahn reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- 982 clinicians in this Medicare group
East Chicago, IN 46312
- Reassigned Medicare billing, Indiana enrollment
- 598 clinicians in this Medicare group
Effingham, IL 62401
- Reassigned Medicare billing, Illinois enrollment
- 119 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.
Areas of Expertise CMS Part B claims 4
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 Affiliations CMS Care Compare 4
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Presence Mercy Medical Center
Acute Care Hospitals · Aurora, ILAscension St Vincent Hospital
Acute Care Hospitals · Indianapolis, INSt Vincent Heart Center
Acute Care Hospitals · Carmel, INAscension St Vincent Jennings
Critical Access Hospitals · North Vernon, INPhysician 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.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Steven Zahn's NPI number?
The NPI number for Steven Zahn is 1689820409. It was assigned to this individual provider in the NPPES registry on August 12, 2008.
Where is Steven Zahn located?
Steven Zahn practices at 259 E Erie St Ste 100, Chicago, IL 60611. The listed phone number is (312) 926-9512.
What is Steven Zahn's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Steven Zahn enrolled in Medicare?
Yes. Steven Zahn 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 Steven Zahn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Steven Zahn reassigns Medicare benefits to 3 organizations: Cepamerica Illinois LLP (Chicago, IL), Cep America LLC (East Chicago, IN) and Vituity - Illinois Auc LLP (Effingham, 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 Steven Zahn's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Steven Zahn affiliated with any hospitals?
According to CMS data, Steven Zahn is affiliated with Presence Mercy Medical Center, Ascension St Vincent Hospital, St Vincent Heart Center and Ascension St Vincent Jennings.
When was this NPI record last updated?
The NPPES record for Steven Zahn was last updated on April 12, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Steven M Zahn, M.D. · NPI 1689820409
Emergency Medicine physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since August 12, 2008.
## Identity
- **NPI:** 1689820409 (Entity type: Individual)
- **Enumerated:** August 12, 2008
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 036.122218 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 259 E ERIE ST STE 100, Chicago, IL 60611-2930
- **Phone:** (312) 926-9512
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Cepamerica Illinois LLP (NPI 1134677370, Chicago, IL); Cep America LLC (NPI 1336805563, East Chicago, IN); Vituity - Illinois Auc LLP (NPI 1306334198, Effingham, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Creighton University School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** April 12, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1689820409) · Data from the CMS NPPES public registry.