DR. LOC DAC BUI (M.D.) – Internal Medicine Physician, NPI 1023081387
Internal Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
21,511 INTERNAL MEDICINE in CA
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Provider Addresses for DR. LOC DAC BUI (M.D.)
Bolsa Avenue, Bolsa, Westminster, Orange County, California, 98843, United States
SUITE B
WESTMINSTER, CA 926835475
Phone: (714) 897-2623
Fax: (714) 379-0343
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 6 Open Payments records for all available years, with a total value of $468.
Total Amount is formed as General ($468) + Research ($0) + Ownership ($0) = $468.
Last reported payment date: 2024-11-11 • Largest payer in this snapshot: Gilead Sciences, Inc. ($392).
Total Amount
$468
General + Research + Ownership
Payments
6
Total payment records
General Amount
$468
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-11-11
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Gilead Sciences, Inc. | $392 |
| Exact Sciences Corporation | $49 |
| Medtronic, Inc. | $28 |
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: 2010-11-23
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 |
|---|---|---|---|---|
| I20101123000285 | I | Internal Medicine | 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 | 91 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 246 | 66 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 139 | 68 | $0 |
| 93000 | Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | 61 | 43 | $0 |
| G0008 | Administration of influenza virus vaccine | 57 | 56 | $0 |
Insurance plans in this area (ZIP 92683)
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