DR. RYAN COURTNEY FIELDS (MD) – Surgical Oncology Physician, NPI 1912900440
Surgical Oncology Physician
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Doctor Profile
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Profile Insights
NPPES metrics only — not quality of care.
46 SURGICAL ONCOLOGY in MO
Provider Addresses for DR. RYAN COURTNEY FIELDS (MD)
PO BOX 7412011
CHICAGO, IL 606742011
Phone: (314) 362-2280
Fax: (888) 352-8360
Type: Mailing
4500 FOREST PARK AVE
DIV SURG HPB, 5TH FL
SAINT LOUIS, MO 631082114
Phone: (314) 362-2280
Fax: (888) 352-8360
Type: Location
South Euclid Avenue, WashU, City of Saint Louis, Missouri, 63110, United States
MSC 8109-37-920
SAINT LOUIS, MO 631101010
Phone: (314) 454-7224
Fax: (877) 991-4780
Type: Mailing
Siteman Cancer Center, 4921, Parkview Place, BJC, City of Saint Louis, Missouri, 63110, United States
DIV SURG ONCOLOGY, STE 8C
SAINT LOUIS, MO 631101032
Phone: (314) 362-2280
Fax: (888) 352-8360
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
CMS reports 2 Open Payments records for all available years, with a total value of $243.
Total Amount is formed as General ($243) + Research ($0) + Ownership ($0) = $243.
Last reported payment date: 2024-06-27 • Largest payer in this snapshot: Lilly USA, LLC ($123).
Total Amount
$243
General + Research + Ownership
Payments
2
Total payment records
General Amount
$243
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-06-27
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| Lilly USA, LLC | $123 |
| Novo Nordisk Inc | $120 |
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: 2025-07-24
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 |
|---|---|---|---|---|
| I20051107000008 | I | Surgical Oncology | MO | TBD |
| I20250724004124 | I | Surgical Oncology | NY | 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 |
|---|---|---|---|---|
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 106 | 96 | $0 |
| 99205 | New patient office or other outpatient visit, 60-74 minutes | 89 | 89 | $0 |
| 11606 | Removal of cancer skin growth of body, arms, or legs, more than 4.0 cm | 53 | 49 | $0 |
| 38900 | Imaging of lymph nodes during surgery | 37 | 37 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 33 | 32 | $0 |
Insurance plans in this area (ZIP 60674)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Nurse Practitioner | MO | |
| - | MO | |
| - | FL | |
| - | MO | |
| Diagnostic Radiology | IL | |
| - | IL | |
| - | MO | |
| - | MO | |
| - | MO | |
| - | MO |
Reviews
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