DR. CHARLES BUI (M.D.) – Hospitalist Physician, NPI 1013100338
Hospitalist Physician
Main info
Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
21,558 INTERNAL MEDICINE in CA
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Provider Addresses for DR. CHARLES BUI (M.D.)
Vermont Avenue, South Los Angeles, Harbor Gateway, Los Angeles, Los Angeles County, California, 90047-4899, United States
HARBOR CITY, CA 907103518
Phone: (310) 517-4027
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)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
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: 2009-11-04
PECOS data refreshed: 2026-06-15
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 |
|---|---|---|---|---|
| I20091104000363 | I | Hospitalist | 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 |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 37 | 14 | $0 |
Insurance plans in this area (ZIP 90710)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| U R O L O G Y | OH | |
| Nurse Practitioner | CA | |
| Internal Medicine | CA | |
| Internal Medicine | CA | |
| Physician Assistant | CA | |
| N E U R O L O G Y | CA | |
| Internal Medicine | CA | |
| O B S T E T R I C S/ G Y N E C O L O G Y | CA | |
| Family Practice, Sports Medicine | CA | |
| Internal Medicine | NY |
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