EA-SLE CHANG M.D.
NPI 1932582061
Surgery in Saint Louis, MO
About Ea-sle Chang M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
EA-SLE CHANG M.D. (NPI 1932582061) is an individual surgery provider in Saint Louis, Missouri, licensed in Missouri (2026018533) and active in the NPI registry since July 2015. She is enrolled in Medicare PECOS, is affiliated with Mercyone Newton Medical Center, and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 3
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
Ea-sle Chang 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
2Medicare enrollment records show Ea-sle Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 49 clinicians in this Medicare group
Indianola, IA 50125
- Reassigned Medicare billing, Iowa enrollment
- 516 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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercyone Newton Medical Center
Acute Care Hospitals · Newton, IAMercyone Des Moines Medical Center
Acute Care Hospitals · Des Moines, IAMercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63141 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63141
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 Ea-sle Chang's NPI number?
The NPI number for Ea-sle Chang is 1932582061. It was assigned to this individual provider in the NPPES registry on July 7, 2015. The provider is also known as Iris Chang MD.
Where is Ea-sle Chang located?
Ea-sle Chang practices at 621 S New Ballas Rd Ste 560A, Saint Louis, MO 63141. The listed phone number is (314) 251-6440.
What is Ea-sle Chang's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Ea-sle Chang enrolled in Medicare?
Yes. Ea-sle Chang 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 Ea-sle Chang's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ea-sle Chang reassigns Medicare benefits to 2 organizations: Mercy Clinic Trauma And General Surgery, LLC (Saint Louis, MO) and Mercy Clinics, Inc (Indianola, IA). 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 Ea-sle Chang's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ea-sle Chang accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families, Ambetter from Sunflower Health Plan and Anthem Blue Cross and Blue Shield and 4 other insurers list Ea-sle Chang 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.
Is Ea-sle Chang affiliated with any hospitals?
According to CMS data, Ea-sle Chang is affiliated with Mercyone Newton Medical Center, Mercyone Des Moines Medical Center and Mercy Hospital St Louis.
When was this NPI record last updated?
The NPPES record for Ea-sle Chang was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.
# Ea-Sle Chang, M.D. · NPI 1932582061
Surgery physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since July 7, 2015.
## Identity
- **NPI:** 1932582061 (Entity type: Individual)
- **Enumerated:** July 7, 2015
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** 2026018533 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 621 S NEW BALLAS RD STE 560A, Saint Louis, MO 63141-8261
- **Phone:** (314) 251-6440 · **Fax:** (314) 251-4456
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Mercy Clinic Trauma And General Surgery, LLC (NPI 1699825695, Saint Louis, MO); Mercy Clinics, Inc (NPI 1912304668, Indianola, IA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1932582061) · Data from the CMS NPPES public registry.