Internal Medicine, Infectious Disease · Glendale, CA
NPI
1295790319
Since 2006
Specialty
Internal Medicine, Infectious Disease
Code 207RI0200X
Group practices
2
Medicare group memberships
Hospitals
1
Hospital affiliations
801 South Chevy Chase Drive #105
Glendale, CA, 91205
Phone (818) 242-5299
Groups this clinician bills Medicare through
Medicare paid, 2024
$50K
540 services
Medicare patients, 2024
246
Average age 72
Drug cost, 2024
$635K
558 prescriptions
Company payments, 2025
$176
From 4 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Byron Williams was code 99233 (hospital e&m - subsequent), 259 times for 124 patients. In total Byron Williams billed 540 services in 9 codes, and Medicare paid $50K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-07-13.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99233 Hospital E&M - Subsequent | Facility | 259 | 124 | $97.02 | $25K |
| 99221 Hospital E&M - Initial | Facility | 138 | 134 | $67.46 | $9,310 |
| 99223 Hospital E&M - Initial | Facility | 65 | 62 | $141.48 | $9,196 |
| 99214 Office E&M - Established | Office | 28 | 12 | $80.78 | $2,262 |
| 99214 Office E&M - Established | Facility | 22 | 12 | $83.35 | $1,834 |
By year: 2022 $58K for 565 services; 2023 $38K for 401 services; 2024 $50K for 540 services.
Medicare prescription drug claims, 2024
In 2024, the drug Byron Williams prescribed most often to Medicare patients was Biktarvy (Bictegrav/Emtricit/Tenofov Ala), with 56 prescriptions and refills. In total Byron Williams wrote 558 Medicare prescriptions that cost $635K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 56 | 56 | Under 11 | $221K |
| Ertapenem Ertapenem Sodium | 49 | 49 | Under 11 | $27K |
| Daptomycin Generic | 42 | 42 | Under 11 | $81K |
| Meropenem Generic | 23 | 23 | Under 11 | $3,828 |
| Ceftriaxone Ceftriaxone Sodium | 23 | 23 | Under 11 | $1,192 |
| Sodium Chloride 0.9 % Sodium Chloride | 21 | 21 | Under 11 | $613 |
| Fluconazole Generic | 21 | 27 | Under 11 | $4,474 |
| Linezolid Generic | 21 | 21 | Under 11 | $15K |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 18 | 20 | Under 11 | $220 |
| Azithromycin Generic | 18 | 18 | 12 | $82.81 |
| Cefdinir Generic | 17 | 17 | 13 | $263 |
| Efavirenz-Emtric-Tenofov Disop Efavirenz/Emtricit/Tenofovr Df | 12 | 12 | Under 11 | $965 |
| Cresemba Isavuconazonium Sulfate | 12 | 12 | Under 11 | $67K |
| Amlodipine Besylate Generic | 12 | 18 | Under 11 | $56.08 |
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 11 | 11 | Under 11 | $122 |
Brand drugs: 201 claims; generic drugs: 357 claims; opioid claims: 12.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Byron Williams $176 ($176 in general payments such as food, travel and fees) from 4 companies. The largest payer was Shionogi Inc with $93.96.
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.