PETER GEORGE MAVRELIS (MD) – Gastroenterology Physician, NPI 1326043597
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
448 GASTROENTEROLOGY in IN
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Provider Addresses for PETER GEORGE MAVRELIS (MD)
8895, Broadway, Merrillville, Lake County, Indiana, 46410, United States
MERRILLVILLE, IN 464107037
Phone: (219) 738-2081
Fax: (219) 736-4658
Type: Location
7895 GRAND BLVD
HOBART, IN 463426665
Phone: (219) 947-1910
Fax: (219) 758-5009
Type: Mailing
8558, Broadway, Merrillville, Lake County, Indiana, 46410, United States
MERRILLVILLE, IN 464107032
Phone: (219) 392-7084
Fax: (219) 703-6854
Type: Mailing
3800 Saint Mary Rd Ste 304
Valparaiso, IN 463833986
Phone: (219) 947-6795
Fax: (219) 703-6896
Type: Location
101 E 87th Ave Ste 420
Merrillville, IN 464107335
Phone: (219) 758-5008
Fax: (219) 758-5009
Type: Location
3800 SAINT MARY RD STE 304
VALPARAISO, IN 463833986
Phone: (219) 947-6795
Fax: (219) 703-6896
Type: Location
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: 2007-03-23
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 |
|---|---|---|---|---|
| I20070323000030 | I | Gastroenterology | IN | 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 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 43 | 42 | $0 |
| G0121 | Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | 42 | 42 | $0 |
| 43235 | Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 20 | 20 | $0 |
| 45384 | Removal of polyps or growths of large bowel using a flexible endoscope with electrical cautery | 19 | 19 | $0 |
Insurance plans in this area (ZIP 46410)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | IN | |
| General Surgery, Colorectal Surgery (Proctology) | NY | |
| Gynecological Oncology, Obstetrics/Gynecology | IN | |
| O B S T E T R I C S/ G Y N E C O L O G Y | IN | |
| Nurse Practitioner | IN | |
| Family Practice | IN | |
| P O D I A T R Y | IN | |
| Nurse Practitioner | IN | |
| N E U R O L O G Y | AR | |
| General Surgery | IL |
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