THOMAS P HSIA (MD) – Gastroenterology Physician, NPI 1508894486
Gastroenterology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
1,981 GASTROENTEROLOGY in CA
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Provider Addresses for THOMAS P HSIA (MD)
plaza, San José de Chiquitos, Santa María, San José de Chiquitos, Chiquitos, Santa Cruz, Bolivia
#307
SANTA MARIA, CA 934546955
Phone: (805) 922-6581
Fax: (805) 614-6055
Type: Mailing
361 TOWN CENTER WEST SUITE 101
SANTA MARIA, CA 93458
Phone: (805) 922-6581
Fax: (805) 348-3217
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 96 Open Payments records for all available years, with a total value of $1,877.
Total Amount is formed as General ($1,877) + Research ($0) + Ownership ($0) = $1,877.
Last reported payment date: 2024-12-16 • Largest payer in this snapshot: ABBVIE INC. ($1,262).
Total Amount
$1,877
General + Research + Ownership
Payments
96
Total payment records
General Amount
$1,877
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-16
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $1,262 |
| QOL Medical, LLC | $218 |
| Phathom Pharmaceuticals, Inc. | $153 |
| Gilead Sciences, Inc. | $39 |
| Janssen Biotech, Inc. | $36 |
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: 2008-10-24
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 |
|---|---|---|---|---|
| I20081024000223 | 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.
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 | 775 | 450 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 295 | 267 | $0 |
| 43239 | Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 184 | 177 | $0 |
| 45385 | Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 166 | 165 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 133 | 133 | $0 |
Insurance plans in this area (ZIP 93454)
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Provider's Procedures
Group practice members
| Name | Specialty | State |
|---|---|---|
| Certified Registered Nurse Anesthetist (Crna) | AZ | |
| Gastroenterology, Internal Medicine | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| Certified Registered Nurse Anesthetist (Crna) | TX | |
| - | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA | |
| G A S T R O E N T E R O L O G Y | CA | |
| Certified Registered Nurse Anesthetist (Crna) | CA |
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