William Feldner, D.O.
NPI 1922085539 · Family Medicine Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Feldner, D.O. is a Family Medicine Physician provider in Saint Louis, MO (NPI 1922085539).
Provider details
- NPI number
- 1922085539
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- R1J82 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
753 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 157 | $123 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 117 | $9 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 94 | $8 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 92 | $10 |
| Ldl Cholesterol Level83721 | 51 | $10 |
| Hemoglobin A1c Level83036 | 45 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 104 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 593 | 169 |
| Amlodipine Besylate | 251 | 70 |
| Lisinopril | 239 | 64 |
| Losartan Potassium | 199 | 51 |
| Metoprolol Succinate | 165 | 45 |
| Levothyroxine Sodium | 156 | 40 |
| Metformin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$17 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 1011 Bowles AveSt Francis Bldg., Suite 450Fenton, MO 63026-2395Phone: (314) 467-1500Fax: (314) 467-1515
Registry dates
- Enumerated
- 2005-12-23
- Last updated
- 2025-09-18
- Certified
- 2025-09-18
Frequently asked questions
- What is William Feldner's NPI number?
- William Feldner's National Provider Identifier (NPI) is 1922085539, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Feldner's specialty?
- William Feldner is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Feldner located?
- William Feldner's practice location on file with NPPES is 3009 North New Ballas Road Ste 226a, Saint Louis, MO 63195-2395.
- What is William Feldner's phone number?
- The practice phone number listed in the NPPES registry for William Feldner is (314) 996-4900.
- Does William Feldner accept Medicare?
- William Feldner is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Feldner's NPI active?
- Yes — William Feldner's NPI (1922085539) is active in the NPPES registry as of the last update on 2025-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.