Family Medicine, Geriatric Medicine · Florissant, MO
NPI
1023099140
Since 2005
Specialty
Family Medicine, Geriatric Medicine
Code 207QG0300X
Group practices
1
Medicare group memberships
Hospitals
5
Hospital affiliations
2137 Charbonier Rd Ste B
Florissant, MO, 63031
Phone (314) 831-0181
Groups this clinician bills Medicare through
Medicare paid, 2024
$39K
1,688 services
Medicare patients, 2024
115
Average age 76
Drug cost, 2024
$1.4M
17,182 prescriptions
Company payments, 2025
$1,251
From 15 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by William S Knapp was code 99214 (office e&m - established), 248 times for 113 patients. In total William S Knapp billed 1,688 services in 65 codes, and Medicare paid $39K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2019-02-08.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 248 | 113 | $73.83 | $18K |
| 36415 Venipuncture Blood Collection | Office | 225 | 106 | $8.58 | $1,930 |
| 85025 Blood Count | Office | 175 | 100 | $7.54 | $1,320 |
| 80053 Clinical Chemistry | Office | 168 | 101 | $10.25 | $1,722 |
| 84443 Clinical Chemistry | Office | 126 | 84 | $16.35 | $2,060 |
| 80061 Clinical Chemistry | Office | 105 | 96 | $13.00 | $1,366 |
| 83036 Blood Count | Office | 60 | 26 | $9.52 | $571 |
| 82306 Clinical Chemistry | Office | 55 | 41 | $29.01 | $1,596 |
| 80048 Clinical Chemistry | Office | 40 | 31 | $8.29 | $332 |
| 85018 Blood Count | Office | 35 | 30 | $2.32 | $81.2 |
| 85014 Blood Count | Office | 35 | 30 | $2.32 | $81.2 |
| 90662 Vaccine Product | Office | 35 | 34 | $78.27 | $2,739 |
| G0008 Administration of influenza virus vaccine | Office | 35 | 33 | $31.12 | $1,089 |
| G0103 Prostate cancer screening; prostate specific antigen test (psa) | Office | 31 | 31 | $18.92 | $587 |
| 82570 Clinical Chemistry | Office | 30 | 25 | $5.08 | $152 |
By year: 2022 $47K for 4,665 services; 2023 $44K for 1,839 services; 2024 $39K for 1,688 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 225 | 106 | $8.58 | $1,930 |
| 85025 Blood Count | 175 | 100 | $7.54 | $1,320 |
| 80053 Clinical Chemistry | 168 | 101 | $10.25 | $1,722 |
| 84443 Clinical Chemistry | 126 | 84 | $16.35 | $2,060 |
| 80061 Clinical Chemistry | 105 | 96 | $13.00 | $1,366 |
| 83036 Blood Count | 60 | 26 | $9.52 | $571 |
| 82306 Clinical Chemistry | 55 | 41 | $29.01 | $1,596 |
| 80048 Clinical Chemistry | 40 | 31 | $8.29 | $332 |
| 85014 Blood Count | 35 | 30 | $2.32 | $81.2 |
| 85018 Blood Count | 35 | 30 | $2.32 | $81.2 |
Medicare prescription drug claims, 2024
In 2024, the drug William S Knapp prescribed most often to Medicare patients was Rosuvastatin Calcium, with 744 prescriptions and refills. In total William S Knapp wrote 17,182 Medicare prescriptions that cost $1.4M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Rosuvastatin Calcium Generic | 744 | 2,113 | 221 | $10K |
| Atorvastatin Calcium Generic | 656 | 1,870 | 181 | $7,266 |
| Amlodipine Besylate Generic | 509 | 1,360 | 129 | $2,955 |
| Levothyroxine Sodium Generic | 502 | 1,403 | 127 | $8,190 |
| Metoprolol Succinate Generic | 487 | 1,380 | 147 | $7,015 |
| Lisinopril Generic | 478 | 1,392 | 138 | $2,813 |
| Alprazolam Generic | 463 | 498 | 88 | $2,657 |
| Pantoprazole Sodium Generic | 460 | 1,340 | 141 | $6,053 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 450 | 450 | 76 | $9,749 |
| Gabapentin Generic | 344 | 844 | 111 | $6,206 |
| Furosemide Generic | 334 | 877 | 101 | $2,367 |
| Alendronate Sodium Generic | 284 | 729 | 79 | $2,575 |
| Omeprazole Generic | 269 | 763 | 76 | $4,313 |
| Losartan Potassium Generic | 258 | 745 | 73 | $2,953 |
| Metoprolol Tartrate Generic | 238 | 707 | 64 | $1,963 |
Brand drugs: 1,773 claims; generic drugs: 15,260 claims; opioid claims: 905.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid William S Knapp $1,251 ($1,251 in general payments such as food, travel and fees) from 15 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $387.
| Company | Payments | Amount |
|---|---|---|
| AstraZeneca Pharmaceuticals LP AZN | 15 | $387 |
| GlaxoSmithKline, LLC. GSK | 14 | $200 |
| Lilly USA, LLC LLY | 8 | $162 |
| Abbvie Inc. ABBV | 6 | $129 |
| Pfizer Inc. PFE | 4 | $80.53 |
| Amgen Inc. AMGN | 4 | $75.05 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 3 | $47.93 |
| Exact Sciences Corporation EXAS | 2 | $30.9 |
| Novartis Pharmaceuticals Corporation NVS | 2 | $29.06 |
| Abbott Laboratories ABT | 1 | $21.8 |
Official US government data on Original Medicare services, Medicare prescription drug plans and the payments drug and device companies must report. Services with fewer than 11 patients and drugs with fewer than 11 claims are not published. Procedure codes are shown by number with their public category.