HEATHER MARIE GANNON-STRINGER (P.A.) – Physician Assistant, NPI 1598989097
Physician Assistant
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
5,035 PHYSICIAN ASSISTANT in IL
Provider Addresses for HEATHER MARIE GANNON-STRINGER (P.A.)
1725 W HARRISON ST
SUITE 829
CHICAGO, IL 606123841
Phone: (312) 942-6300
Type: Location
PO BOX 802
OAK LAWN, IL 604540802
Phone: (708) 422-3242
Fax: (708) 422-3243
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 27 Open Payments records for all available years, with a total value of $661.
Total Amount is formed as General ($661) + Research ($0) + Ownership ($0) = $661.
Last reported payment date: 2024-10-22 • Largest payer in this snapshot: Merck Sharp & Dohme LLC ($226).
Total Amount
$661
General + Research + Ownership
Payments
27
Total payment records
General Amount
$661
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-22
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Merck Sharp & Dohme LLC | $226 |
| GlaxoSmithKline, LLC. | $95 |
| Eisai Inc. | $71 |
| ABBVIE INC. | $69 |
| PFIZER INC. | $55 |
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: 2007-07-12
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2023-07-31 (1042 days ago).
Enrollment records
1
Earliest due date
2023-07-31
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 |
|---|---|---|---|---|
| I20070712000146 | I | Physician Assistant | IL | 2023-07-31 |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
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 |
|---|---|---|---|---|
| J1100 | Injection, dexamethasone sodium phosphate, 1 mg | 536 | 21 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 223 | 144 | $0 |
| J2469 | Injection, palonosetron hcl, 25 mcg | 220 | 12 | $0 |
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 143 | 47 | $0 |
| J9045 | Injection, carboplatin, 50 mg | 115 | 12 | $0 |
Insurance plans in this area (ZIP 60612)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Hematology/Oncology | IL | |
| Gynecological Oncology | IL | |
| Gynecological Oncology, Obstetrics/Gynecology | IL | |
| Radiation Oncology | IL | |
| Hematology/Oncology, Internal Medicine | IL | |
| Radiation Oncology | IL | |
| Radiation Oncology | IL | |
| Physician Assistant | IL | |
| H E M A T O L O G Y/ O N C O L O G Y | IL | |
| - | IL |
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