MARY AHN MD – NPI #1407809056
Surgery

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

Health Care Provider Taxonomy Code for Surgery

MARY AHN is a surgeon located in WINFIELD, IL. NPPES has assigned the NPI number 1407809056 to MARY AHN on May 17, 2006. It is a Type-1 NPI, indicating this NPI number is associated with an individual. According to the NPI Registry, there are 2 additional location(s) assigned to this provider which are listed below. The primary taxonomy selected by this provider is 208600000X from the Health Care Provider Taxonomy code set, which is classified as Surgery.

The NPI profile was last updated on Nov 13, 2025. Use the NPI data found here to bill health insurance companies, identify providers enrolled in Medicare and Medicaid services or other HIPAA compliant transactions. See the complete NPI profile for MARY AHN below.

NPI Profile for
MARY AHN

NPI Number
1407809056
Enumeration Date

(more than 20 years ago)
Entity Type
Type-1  Individual (Female)
Legal Name
MARY AHN
Credentials
MD
Primary location
25 N WINFIELD RD STE 2202
WINFIELD, IL 60190-1379
Phone: (630) 307-7799 Fax: (630) 307-2277
2 Other location(s):
304 Randall Rd
Geneva, IL 60134-4200
Phone: (630) 307-7799
Fax: (630) 307-2277
4405 Weaver Pkwy
Warrenville, IL 60555-3269
Phone: (630) 307-7799
Fax: (630) 307-2277
Mailing address
Same as primary location
Sole Proprietor
No
Updated
Certification Date
Nov 13, 2025

Note: NPPES allows providers to attest to the accuracy of their NPI data. When a provider request any change to the NPI record, they will be able to attest to their changed NPI data, resulting in an updated certification date.

Identifiers

Identifiers for MARY AHN

Identifiers are used to associate other provider identifiers such as Medicaid or other insurers (ie:, Blue Cross, Blue Shield, Aetna, Kaiser-Permanente, etc.), with their NPI number. These identifiers can be used in matching an NPI number to an insurer's records. However, not all providers have such numbers and not all providers choose to include them in their NPI information.

DescriptionIssuerStateIdentifier
otherMEDICARE PTAN (GROUP)IL206147
otherMEDICARE PTAN (INDIVIDUAL)IL206147228
medicaidIL036096682
Taxonomy Code(s)

A taxonomy code is a code that describes the health care service provider's type, classification, and the area of specialization. The primary specialty for this provider is indicated as (Primary) below.

Taxonomy Classification / Specialization State License
208600000X
- Surgery (Primary)		 IL 036-096682

The taxonomy codes are selected by the provider at the time of NPI registration. Selection of a taxonomy code does not replace any credentialing or validation process that the provider requesting the code should complete.

Additional Information

Education
LOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE - Graduated 1995
Accepts Medicare
This provider accepts Medicare-approved amount as payment in full. The Medicare-approved amount is the total the provider can be paid. When a provider accepts the Medicare-approved amount as payment, you won't be billed for more than the Medicare deductible & coinsureance.
Medicare Ordering & Referring
Provider can:
  • Refer to Part B
  • Order Durable Medical Equipment
  • Refer to Home Health Agency
  • Order Power Mobility Devices
Affiliations
MARY AHN is affiliated with the following medical group(s):
  • HOSPITAL
    • CENTRAL DUPAGE HOSPITAL
      25 NORTH WINFIELD ROAD
      WINFIELD, IL 60190
    • DELNOR COMMUNITY HOSPITAL
      300 RANDALL RD
      GENEVA, IL 60134

Why is my NPI data (personal information) being displayed publicly?
If you have an active NPI profile, your profile is required to be disclosed according to the FOIA and eFOIA. HIPAA also requires covered providers to share their NPI with other providers, health plans, clearinghouses and any entity that may need it for billing purposes.

How do I correct or change the NPI data displayed here?
At any time, providers can make changes to their NPI profile at NPPES. Login to NPPES to make changes online or call (800) 465-3203 for assistance. Changes made at NPPES will be reflected on this web site within a few days.

Can I hide my NPI profile from the public?
Unfortunately, No. The NPPES discloses health care provider data under the Freedom of Information Act to the public, which means anyone may request such information directly from the National Plan & Provider Enumeration System. See the complete CMS Data Dissemination Notice here.