WILLIAM ANG LEE (MD) – Internal Medicine Physician, NPI 1619960705
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 WILLIAM ANG LEE (MD)
Alamo Street, Alamo Villas, Simi Valley, Ventura County, California, 90363, United States
SIMI VALLEY, CA 930651311
Phone: (818) 726-1930
Fax: (818) 878-1563
Type: Mailing
2950 Sycamore Dr
Ste 300
Simi Valley, CA 930651210
Phone: (805) 526-0226
Fax: (805) 526-7092
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 130 Open Payments records for all available years, with a total value of $3,006.
Total Amount is formed as General ($3,006) + Research ($0) + Ownership ($0) = $3,006.
Last reported payment date: 2024-12-21 • Largest payer in this snapshot: ABBVIE INC. ($712).
Total Amount
$3,006
General + Research + Ownership
Payments
130
Total payment records
General Amount
$3,006
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-12-21
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $712 |
| AstraZeneca Pharmaceuticals LP | $477 |
| Lilly USA, LLC | $395 |
| Novo Nordisk Inc | $367 |
| IDORSIA PHARMACEUTICALS US INC | $117 |
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: 2005-01-12
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 |
|---|---|---|---|---|
| I20050112000459 | 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 | 320 | 156 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 58 | 55 | $0 |
| 99497 | Advance care planning, first 30 minutes | 41 | 41 | $0 |
| G0439 | Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 40 | 40 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 13 | 13 | $0 |
Insurance plans in this area (ZIP 93065)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Family Practice | CA |
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