MICHAEL J. GRUPKA (MD) – Gastroenterology Physician, NPI 1497953467
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
524 GASTROENTEROLOGY in GA
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Provider Addresses for MICHAEL J. GRUPKA (MD)
Canton Road Northeast, Powell Station, Marietta, Cobb, Georgia, 30066, United States
MARIETTA, GA 300608949
Phone: (678) 741-5000
Fax: (678) 819-4280
Type: Mailing
200, Bill Carruth Parkway, Hiram, Paulding County, Georgia, 30141, United States
HIRAM, GA 30141
Phone: (678) 741-5000
Fax: (770) 445-9013
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 9 Open Payments records for all available years, with a total value of $186.
Total Amount is formed as General ($186) + Research ($0) + Ownership ($0) = $186.
Last reported payment date: 2024-11-19 • Largest payer in this snapshot: ABBVIE INC. ($42).
Total Amount
$186
General + Research + Ownership
Payments
9
Total payment records
General Amount
$186
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $42 |
| Janssen Biotech, Inc. | $39 |
| Ferring Pharmaceuticals Inc. | $30 |
| Ardelyx, Inc. | $22 |
| Medtronic, Inc. | $20 |
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: 2009-10-19
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 |
|---|---|---|---|---|
| I20091019000516 | I | Gastroenterology | GA | 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 | 85 | 74 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 62 | 62 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 52 | 52 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 46 | 46 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 45 | 34 | $0 |
Insurance plans in this area (ZIP 30060)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | GA | 45378 | Diagnostic examination of large bowel using an endoscope | 25 | 25 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Gastroenterology, Internal Medicine | GA | |
| Internal Medicine, Gastroenterology | NV | |
| Nurse Practitioner | GA | |
| G A S T R O E N T E R O L O G Y | GA | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| G A S T R O E N T E R O L O G Y | GA | |
| Internal Medicine, Gastroenterology | GA | |
| G A S T R O E N T E R O L O G Y | GA | |
| Internal Medicine, Gastroenterology | NY | |
| Physician Assistant | GA |
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