DR. ANKITA MAHAJAN DO
NPI 1639608680
Obstetrics & Gynecology in Oak Lawn, IL
About Dr. Ankita Mahajan Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANKITA MAHAJAN DO (NPI 1639608680) is an individual obstetrics & gynecology provider in Oak Lawn, Illinois, licensed in Illinois (125070721) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Advocate Christ Hospital & Medical Center, and is a graduate of Other (2017).
NPPES Registry Identity
Specialties & Licenses
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. Ankita Mahajan Do 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 Ankita Mahajan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oak Lawn, IL 60453
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Advocate Health And Hospitals Corporation
- 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Advocate Christ Hospital & Medical Center
Acute Care Hospitals · Oak Lawn, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60453 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 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
OAK LAWN, IL 60453
OAK LAWN, IL 60453
OAK LAWN, IL 60453
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 Ankita Mahajan's NPI number?
The NPI number for Ankita Mahajan is 1639608680. It was assigned to this individual provider in the NPPES registry on June 5, 2017.
Where is Ankita Mahajan located?
Ankita Mahajan practices at 4400 W 95th St Ste 205, Oak Lawn, IL 60453. The listed phone number is (708) 684-5340.
What is Ankita Mahajan's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Ankita Mahajan enrolled in Medicare?
Yes. Ankita Mahajan 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 Ankita Mahajan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ankita Mahajan reassigns Medicare benefits to Advocate Health & Hospitals Corporation (Oak Lawn, 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 Ankita Mahajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ankita Mahajan accept?
Health plans from Oscar Health list Ankita Mahajan 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 Ankita Mahajan affiliated with any hospitals?
According to CMS data, Ankita Mahajan is affiliated with Advocate Christ Hospital & Medical Center.
When was this NPI record last updated?
The NPPES record for Ankita Mahajan was last updated on January 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Dr. Ankita Mahajan, DO · NPI 1639608680
Obstetrics & Gynecology physician in Oak Lawn, Illinois. Individual provider, active in the CMS NPPES registry since June 5, 2017.
## Identity
- **NPI:** 1639608680 (Entity type: Individual)
- **Enumerated:** June 5, 2017
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 125070721 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 4400 W 95TH ST STE 205, Oak Lawn, IL 60453-2658
- **Phone:** (708) 684-5340
## 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 & Hospitals Corporation (NPI 1912936014, Oak Lawn, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2017
## Record status
- **NPPES last updated:** January 7, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1639608680) · Data from the CMS NPPES public registry.