DR. WILLIAM FREDERICK FELDNER (D.O.) – Family Medicine Physician, NPI 1922085539
Family Medicine Physician
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Profile Insights
NPPES metrics only — not quality of care.
2,330 FAMILY PRACTICE in MO
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Provider Addresses for DR. WILLIAM FREDERICK FELDNER (D.O.)
PO BOX 23340
SAINT LOUIS, MO 631563340
Phone: (314) 467-1500
Fax: (314) 467-1515
Type: Mailing
1011, Bowles Avenue, Fenton, Saint Louis County, Missouri, 63026, United States
ST FRANCIS BLDG., SUITE 450
FENTON, MO 630262395
Phone: (314) 467-1500
Fax: (314) 467-1515
Type: Location
1011 Bowles Ave
St Francis Bldg., Suite 450
Fenton, MO 630262395
Phone: (314) 467-1500
Fax: (314) 467-1515
Type: Location
PO BOX 959354
SAINT LOUIS, MO 631953340
Phone: (314) 996-4900
Fax: (314) 996-4901
Type: Mailing
3009 NORTH NEW BALLAS ROAD STE 226A
SAINT LOUIS, MO 631952395
Phone: (314) 996-4900
Fax: (314) 996-4901
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 $33.
Total Amount is formed as General ($33) + Research ($0) + Ownership ($0) = $33.
Last reported payment date: 2024-02-08 • Largest payer in this snapshot: ABBVIE INC. ($33).
Total Amount
$33
General + Research + Ownership
Payments
2
Total payment records
General Amount
$33
General payments
Research Amount
$0
Research funding
Ownership Amount
$0
Ownership interests
Ownership Count
0
Ownership records
Last Payment Date
2024-02-08
Latest reported date
Top Companies
Largest payers in this snapshot
| Company | Amount |
|---|---|
| ABBVIE INC. | $33 |
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: 2010-08-16
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 |
|---|---|---|---|---|
| I20100816000873 | I | Family Practice | 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 |
|---|---|---|---|---|
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 165 | 79 | $0 |
| 36415 | Insertion of needle into vein for collection of blood sample | 105 | 63 | $0 |
| 85025 | Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 84 | 57 | $0 |
| 80053 | Blood test, comprehensive group of blood chemicals | 78 | 58 | $0 |
| 83036 | Hemoglobin a1c level | 49 | 29 | $0 |
Insurance plans in this area (ZIP 63156)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| - | MO | |
| - | MO | |
| Family Practice | MO | |
| Hospitalist, Family Practice | MO | |
| Internal Medicine | MO | |
| - | MO | |
| Family Practice | MO | |
| Internal Medicine | IL | |
| Internal Medicine, Hospitalist | MO | |
| Nurse Practitioner | MO |
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