GARY DAVID KOENIG (M.D.) – Gastroenterology Physician, NPI 1861485724
Gastroenterology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
489 GASTROENTEROLOGY in MO
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Provider Addresses for GARY DAVID KOENIG (M.D.)
Village Square, 1417, Southeast 107th Avenue, Russellville, Hazelwood, Portland, Metro, Multnomah County, Oregon, 97216, United States
HAZELWOOD, MO 630421820
Phone: (314) 355-4010
Fax: (314) 355-9484
Type: Location
20 Progress Point Pkwy Ste 206
O Fallon, MO 633682207
Phone: (636) 344-1073
Fax: (636) 916-9953
Type: Location
PO BOX 23340
SAINT LOUIS, MO 631563340
Phone: (314) 355-4010
Fax: (314) 355-9484
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 383 Open Payments records for all available years, with a total value of $6,884.
Total Amount is formed as General ($6,884) + Research ($0) + Ownership ($0) = $6,884.
Last reported payment date: 2024-12-31 • Largest payer in this snapshot: ABBVIE INC. ($1,785).
Total Amount
$6,884
General + Research + Ownership
Payments
383
Total payment records
General Amount
$6,884
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-31
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $1,785 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | $727 |
| Janssen Biotech, Inc. | $719 |
| PFIZER INC. | $600 |
| Takeda Pharmaceuticals U.S.A., Inc. | $548 |
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: 2009-08-03
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 |
|---|---|---|---|---|
| I20090803000025 | I | Gastroenterology | MO | 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 |
|---|---|---|---|---|
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 45 | 45 | $0 |
| 45380 | Biopsy of large bowel using a flexible endoscope | 43 | 43 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 41 | 41 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 32 | 32 | $0 |
| G0121 | Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 31 | 31 | $0 |
Insurance plans in this area (ZIP 63042)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | MO | |
| - | MO | |
| G A S T R O E N T E R O L O G Y | NC | |
| General Surgery | MO | |
| G A S T R O E N T E R O L O G Y | MO | |
| Gastroenterology, Internal Medicine | MO | |
| G A S T R O E N T E R O L O G Y | MO | |
| - | MO | |
| Gastroenterology, Internal Medicine | MO | |
| G A S T R O E N T E R O L O G Y | MO |
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