ISMAIL MERT MD
NPI 1316251796
Obstetrics & Gynecology - Gynecologic Oncology in Chicago, IL
About Ismail Mert Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ISMAIL MERT MD (NPI 1316251796) is an individual gynecologic oncology provider in Chicago, Illinois, licensed in Illinois (036148839) and active in the NPI registry since July 2010. He is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and maintains a secondary practice location in Rochester.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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
Ismail Mert Md 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 Ismail Mert reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chicago, IL 60657
- Reassigned Medicare billing, Illinois enrollment
- Also billed through NPI 1003542184 (Illinois)
- 4,870 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 3
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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Illinois Masonic Medical Center
Acute Care Hospitals · Chicago, ILAdvocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60657 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.
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 Ismail Mert's NPI number?
The NPI number for Ismail Mert is 1316251796. It was assigned to this individual provider in the NPPES registry on July 28, 2010.
Where is Ismail Mert located?
Ismail Mert practices at 900 W Nelson St, Chicago, IL 60657. The listed phone number is (773) 296-7089.
What is Ismail Mert's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Gynecologic Oncology, with taxonomy code 207VX0201X.
Is Ismail Mert enrolled in Medicare?
Yes. Ismail Mert 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 Ismail Mert's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ismail Mert reassigns Medicare benefits to Advocate Health And Hospitals Corp. (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 Ismail Mert's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ismail Mert accept?
Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Ismail Mert 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 Ismail Mert affiliated with any hospitals?
According to CMS data, Ismail Mert is affiliated with Advocate Illinois Masonic Medical Center and Advocate Christ Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Ismail Mert was last updated on October 19, 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.
# Ismail Mert, MD · NPI 1316251796
Gynecologic Oncology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since July 28, 2010.
## Identity
- **NPI:** 1316251796 (Entity type: Individual)
- **Enumerated:** July 28, 2010
- **Primary specialty:** Obstetrics & Gynecology - Gynecologic Oncology · taxonomy 207VX0201X
- **State license:** 036148839 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 900 W NELSON ST, Chicago, IL 60657-6704
- **Phone:** (773) 296-7089
## 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:** Advocate Health And Hospitals Corp. (NPI 1487951711, Chicago, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** October 19, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1316251796) · Data from the CMS NPPES public registry.