ALEXANDER TONTHAT (MD, MBA) – Gastroenterology Physician, NPI 1124522784
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,981 GASTROENTEROLOGY in CA
Provider Addresses for ALEXANDER TONTHAT (MD, MBA)
1200 N State St.
Clinic Tower, Suite A7D
Los Angeles, CA 900331029
Phone: (562) 262-1767
Type: Location
1200, North State Street, Boyle Heights, Los Angeles, Los Angeles County, California, 90033, United States
CLINIC TOWER, SUITE A7D
LOS ANGELES, CA 900331029
Phone: (562) 262-1767
Type: Mailing
1958 CRESCENT DR
SIGNAL HILL, CA 907555600
Phone: (562) 262-1767
Type: Mailing
2767 OLIVE HWY STE 9D
OROVILLE, CA 959666118
Phone: (530) 533-8500
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 7 Open Payments records for all available years, with a total value of $140.
Total Amount is formed as General ($140) + Research ($0) + Ownership ($0) = $140.
Last reported payment date: 2024-12-19 • Largest payer in this snapshot: Janssen Biotech, Inc. ($76).
Total Amount
$140
General + Research + Ownership
Payments
7
Total payment records
General Amount
$140
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-19
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Janssen Biotech, Inc. | $76 |
| ABBVIE INC. | $31 |
| Olympus America Inc. | $16 |
| Boston Scientific Corporation | $16 |
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: 2024-08-27
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 |
|---|---|---|---|---|
| I20240827001773 | I | Gastroenterology | CA | 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.
No Medicare fee-for-service utilization data available for this provider in our database.
Insurance plans in this area (ZIP 90033)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Internal Medicine, Hospitalist | CA | |
| General Surgery | CA | |
| Physician Assistant | CA | |
| O P H T H A L M O L O G Y | CA | |
| General Surgery | CA | |
| Family Practice | CA | |
| Internal Medicine | NV | |
| N E P H R O L O G Y | NY | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| P O D I A T R Y | CA |
Reviews
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