WILLIAM WANG LLC – Psychiatry Physician, NPI 1336235308
Psychiatry Physician
Main info
Profile Insights
NPPES metrics only — not quality of care.
Provider Addresses for WILLIAM WANG LLC
9506 OLIVE BLVD STE 414
SAINT LOUIS, MO 631323104
Phone: (314) 441-9594
Type: Mailing
PO BOX 8412
SAINT LOUIS, MO 631320412
Phone: (314) 441-9594
Type: Mailing
601 ARROW LN
O FALLON, MO 633664410
Phone: (314) 441-9594
Type: Location
255, Spencer Road, Saint Peters, Saint Charles County, Missouri, 63376, United States
SUITE 201
SAINT PETERS, MO 633762494
Phone: (636) 939-2550
Fax: (636) 939-2551
Type: Location
12303 DEPAUL DRIVE
BRIDGETON, MO 63044
Phone: (314) 441-9594
Type: Mailing
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: 2008-06-26
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Past revalidation due date
Earliest CMS due date was 2024-06-30 (710 days ago).
Enrollment records
1
Earliest due date
2024-06-30
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 |
|---|---|---|---|---|
| O20080626000523 | O | Clinic/Group Practice | MO | 2024-06-30 |
What to do next
- Verify current status on the CMS Revalidation Lookup Tool immediately.
- Complete revalidation in PECOS or contact your Medicare Administrative Contractor (MAC).
- Overdue revalidation can lead to deactivation of Medicare billing privileges.
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 63132)
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