MARY AHN (MD) – Surgery Physician, NPI 1407809056
Surgery Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,422 GENERAL SURGERY in IL
Provider Addresses for MARY AHN (MD)
4405 Weaver Pkwy
Warrenville, IL 605553269
Phone: (630) 307-7799
Fax: (630) 307-2277
Type: Location
304 Randall Rd
Geneva, IL 601344200
Phone: (630) 307-7799
Fax: (630) 307-2277
Type: Location
25 N WINFIELD RD STE 2202
WINFIELD, IL 601901379
Phone: (630) 307-7799
Fax: (630) 307-2277
Type: Location
351 DELNOR DR
GENEVA, IL 601344220
Phone: (630) 307-7799
Fax: (630) 307-2277
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2007-04-16
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20070416000581 | I | General Surgery | IL | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 108 | 104 | $0 |
| 19301 | Partial removal of breast | 39 | 37 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 38 | 38 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 35 | 32 | $0 |
| 38900 | Imaging of lymph nodes during surgery | 25 | 25 | $0 |
Insurance plans in this area (ZIP 60555)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| General Surgery | IL | |
| Vascular Surgery | IL | |
| - | IL | |
| Nurse Practitioner | IL | |
| - | IL | |
| C H I R O P R A C T I C | IL | |
| Family Practice | IL | |
| Physical Medicine And Rehabilitation | CO | |
| - | IL | |
| Hospitalist, Family Practice | IL |
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