AMY L TIEN (M.D.) – Gastroenterology Physician, NPI 1922033265
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
828 GASTROENTEROLOGY in MA
Provider Addresses for AMY L TIEN (M.D.)
Burlington, 572, Great Mall Drive, Great Mall, Milpitas, Santa Clara County, California, 95035-8004, United States
BURLINGTON, MA 018050001
Phone: (781) 744-5100
Type: Mailing
LAHEY CLINIC INC
41 MALL ROAD
BURLINGTON, MA 018050001
Phone: (781) 744-5100
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.
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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: 2010-10-25
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 |
|---|---|---|---|---|
| I20101025000317 | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 217 | 164 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 128 | 33 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 33 | 33 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 28 | 26 | $0 |
| G0500 | Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 15 | 15 | $0 |
Insurance plans in this area (ZIP 01805)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| GASTROENTEROLOGY | MA | 43235 | Diagnostic examination of esophagus, stomach, and/or upper small bowel using an endoscope | 16 | 15 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MA | |
| - | MA | |
| G A S T R O E N T E R O L O G Y | NY | |
| Physician Assistant | MA | |
| A N E S T H E S I O L O G Y | MA |
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