BRETT HASSAN (M.D.) – Gastroenterology Physician, NPI 1376679761
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
829 GASTROENTEROLOGY in MA
Provider Addresses for BRETT HASSAN (M.D.)
28 Newton St
Southborough, MA 017721215
Phone: (508) 334-3068
Type: Location
21 Eastern Ave
Worcester, MA 016053094
Phone: (508) 334-8419
Type: Location
55 Lake Ave N
Worcester, MA 016550002
Phone: (508) 334-3068
Type: Location
215 WEST ST
MILFORD, MA 017572277
Phone: (508) 478-6363
Fax: (508) 473-2636
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 87 Open Payments records for all available years, with a total value of $1,759.
Total Amount is formed as General ($1,759) + Research ($0) + Ownership ($0) = $1,759.
Last reported payment date: 2024-12-12 • Largest payer in this snapshot: ABBVIE INC. ($1,008).
Total Amount
$1,759
General + Research + Ownership
Payments
87
Total payment records
General Amount
$1,759
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-12
Latest reported date
Top Companies
Largest payers in this snapshot
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: 2012-08-08
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 |
|---|---|---|---|---|
| I20120808000893 | I | Gastroenterology | MA | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 286 | 222 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 232 | 136 | $0 |
| 99212 | Established patient office or other outpatient visit, 10-19 minutes | 231 | 222 | $0 |
| 99222 | Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 146 | 139 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 127 | 126 | $0 |
Insurance plans in this area (ZIP 01772)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| G A S T R O E N T E R O L O G Y | MA | |
| G A S T R O E N T E R O L O G Y | OH | |
| G A S T R O E N T E R O L O G Y | MA | |
| G A S T R O E N T E R O L O G Y | MA | |
| G A S T R O E N T E R O L O G Y | MA |
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