ALLAN WALTER BARBISH (M.D.) – Gastroenterology Physician, NPI 1891743191
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
648 GASTROENTEROLOGY in MI
Provider Addresses for ALLAN WALTER BARBISH (M.D.)
1500 E Medical Center Dr
Ann Arbor, MI 481095000
Phone: (734) 936-4000
Type: Location
3304, Cooley Court, Portage, Kalamazoo County, Michigan, 49024, United States
PORTAGE, MI 490247430
Phone: (269) 349-2266
Type: Mailing
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 $201.
Total Amount is formed as General ($201) + Research ($0) + Ownership ($0) = $201.
Last reported payment date: 2024-12-04 • Largest payer in this snapshot: Takeda Pharmaceuticals U.S.A., Inc. ($129).
Total Amount
$201
General + Research + Ownership
Payments
9
Total payment records
General Amount
$201
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-04
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $129 |
| ABBVIE INC. | $56 |
| Ipsen Biopharmaceuticals, Inc | $17 |
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: 2014-08-07
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 |
|---|---|---|---|---|
| I20140807002504 | I | Gastroenterology | MI | 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 |
|---|---|---|---|---|
| 45380 | Biopsy of large bowel using a flexible endoscope | 74 | 74 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 73 | 69 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 47 | 46 | $0 |
| G0105 | Colorectal cancer screening; colonoscopy on individual at high risk | 33 | 33 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 31 | 31 | $0 |
Insurance plans in this area (ZIP 48109)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | MI | 45385 | Removal of polyps or growths of large bowel using an endoscope | 12 | 12 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| O B S T E T R I C S/ G Y N E C O L O G Y | MI | |
| Hand Surgery, Orthopedic Surgery | MI | |
| Physician Assistant | MI | |
| Physician Assistant | MI | |
| Cardiovascular Disease (Cardiology), Internal Medicine | MI | |
| Family Practice | MI | |
| O B S T E T R I C S/ G Y N E C O L O G Y | MI | |
| Endocrinology, Internal Medicine | MI | |
| Clinical Social Worker | MI | |
| Internal Medicine | MI |
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