DR. WILLIAM CAVANAUGH CHAPMAN (MD) – Transplant Surgery Physician, NPI 1790703270
Transplant Surgery Physician
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Doctor Profile
Contacts
Profile Insights
NPPES metrics only — not quality of care.
787 GENERAL SURGERY in MO
Provider Addresses for DR. WILLIAM CAVANAUGH CHAPMAN (MD)
4921 PARKVIEW PL
DIV SURG TRANSPLANT, STE 12B
SAINT LOUIS, MO 631101032
Phone: (314) 747-9889
Fax: (314) 361-4197
Type: Location
PO BOX 7412011
CHICAGO, IL 606742011
Phone: (314) 747-9889
Fax: (314) 361-4197
Type: Mailing
660, South Euclid Avenue, Central West End, City of Saint Louis, Missouri, 63110, United States
MSC 8109-05-06
SAINT LOUIS, MO 631101010
Phone: (314) 362-2280
Fax: (888) 352-8360
Type: Mailing
Parkview Place, WashU, City of Saint Louis, Missouri, 63110, United States
STE 8C
SAINT LOUIS, MO 631101032
Phone: (314) 361-4197
Fax: (314) 361-4197
Type: Location
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 $350.
Total Amount is formed as General ($350) + Research ($0) + Ownership ($0) = $350.
Last reported payment date: 2024-01-13 • Largest payer in this snapshot: OrganOx Ltd ($266).
Total Amount
$350
General + Research + Ownership
Payments
6
Total payment records
General Amount
$350
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-01-13
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| OrganOx Ltd | $266 |
| Intuitive Surgical, Inc. | $65 |
| ABBVIE INC. | $18 |
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: 2008-11-04
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 |
|---|---|---|---|---|
| I20081104000476 | I | General Surgery | MO | 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 |
|---|---|---|---|---|
| 99231 | Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 94 | 34 | $0 |
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 69 | 35 | $0 |
| 47135 | Transplantation of donor liver | 13 | 13 | $0 |
| 47143 | Preparation of donor liver for transplantation | 13 | 13 | $0 |
| 50323 | Preparation of donor kidney for transplantation | 12 | 12 | $0 |
Insurance plans in this area (ZIP 63110)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MO | |
| - | MO | |
| - | FL | |
| - | MO | |
| Diagnostic Radiology | IL | |
| - | IL | |
| - | MO | |
| - | MO | |
| - | MO | |
| - | MO |
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