MAURICE WILLIS (MD) – Adult Medicine Physician, NPI 1942369319
Adult Medicine Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
194 MEDICAL ONCOLOGY in MO
Provider Addresses for MAURICE WILLIS (MD)
3655 VISTA AVE
SAINT LOUIS, MO 631102539
Phone: (314) 617-3618
Fax: (314) 617-3631
Type: Mailing
3655 Vista Ave
Saint Louis, MO 631102539
Phone: (314) 617-3618
Fax: (314) 617-3631
Type: Location
400 Medical Plz Ste 100
Lake St Louis, MO 633671493
Phone: (636) 639-8600
Type: Location
1005 HARBORSIDE DR
FL 6
GALVESTON, TX 775550001
Phone: (409) 772-0035
Fax: (409) 747-0707
Type: Location
301, University Boulevard - 6th Street, Galveston, Galveston County, Texas, 77550, United States
GALVESTON, TX 775551022
Phone: (409) 747-0890
Fax: (409) 772-0885
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 79 Open Payments records for all available years, with a total value of $61,883.
Total Amount is formed as General ($61,786) + Research ($96) + Ownership ($0) = $61,883.
Last reported payment date: 2024-10-03 • Largest payer in this snapshot: Lilly USA, LLC ($42,812).
Total Amount
$61,883
General + Research + Ownership
Payments
79
Total payment records
General Amount
$61,786
General payments
Research Amount
$96
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-10-03
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $42,812 |
| Tempus AI, Inc | $9,582 |
| Regeneron Pharmaceuticals, Inc. | $5,245 |
| PFIZER INC. | $2,200 |
| Genentech USA, Inc. | $1,575 |
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: 2023-03-17
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 2 Medicare enrollment records; no due dates published yet.
Enrollment records
2
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 |
|---|---|---|---|---|
| I20040719000809 | I | Medical Oncology | TX | TBD |
| I20230317001050 | I | Hematology/Oncology | 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 |
|---|---|---|---|---|
| 99215 | Established patient office or other outpatient visit, 40-54 minutes | 73 | 31 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 43 | 26 | $0 |
| 99223 | Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 34 | 29 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 29 | 24 | $0 |
Insurance plans in this area (ZIP 63110)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | TX | |
| - | TX | |
| - | NY | |
| Sleep Medicine, Critical Care (Intensivists) | TX | |
| Surgical Oncology | NY | |
| General Surgery | TN | |
| General Surgery | GA | |
| U R O L O G Y | NY | |
| Nurse Practitioner | TX | |
| O B S T E T R I C S/ G Y N E C O L O G Y | TX |
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