DR. ALLEN LUN HWANG (M.D., M.S.C.E.) – Gastroenterology Physician, NPI 1558532689
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
829 GASTROENTEROLOGY in MA
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Provider Addresses for DR. ALLEN LUN HWANG (M.D., M.S.C.E.)
Tufts Medical Center, 800, Washington Street, Chinatown, Financial District, Boston, Suffolk County, Massachusetts, 02111, United States
BOX 1013
BOSTON, MA 021111552
Phone: (617) 636-1273
Mailing address matches the actual address.
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 78 Open Payments records for all available years, with a total value of $5,080.
Total Amount is formed as General ($5,080) + Research ($0) + Ownership ($0) = $5,080.
Last reported payment date: 2024-12-17 • Largest payer in this snapshot: Takeda Pharmaceuticals U.S.A., Inc. ($1,980).
Total Amount
$5,080
General + Research + Ownership
Payments
78
Total payment records
General Amount
$5,080
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-17
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $1,980 |
| Apollo Endosurgery US Inc | $786 |
| Olympus Corporation of the Americas | $670 |
| ABBVIE INC. | $200 |
| Medtronic, Inc. | $159 |
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: 2012-10-10
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 |
|---|---|---|---|---|
| I20121010000284 | 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 | 298 | 229 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 136 | 136 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 61 | 58 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 61 | 60 | $0 |
| 97110 | Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes | 60 | 15 | $0 |
Insurance plans in this area (ZIP 02111)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| P A T H 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 | |
| Certified Registered Nurse Anesthetist (Crna) | ME | |
| Gastroenterology, Internal Medicine | MA | |
| Certified Registered Nurse Anesthetist (Crna) | MA | |
| Gastroenterology, Internal Medicine | MA | |
| Certified Registered Nurse Anesthetist (Crna) | NH | |
| Physical Therapist In Private Practice | MA | |
| Gastroenterology, Diagnostic Radiology | AZ |
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