Internal Medicine · Amherst, NY
NPI
1558546820
Since 2008
Specialty
Internal Medicine
Code 207R00000X
Group practices
4
Medicare group memberships
Hospitals
2
Hospital affiliations
3980a Sheridan Dr Ste 200
Amherst, NY, 14226
Phone (716) 309-4772
Groups this clinician bills Medicare through
Medicare paid, 2024
$70K
826 services
Medicare patients, 2024
206
Average age 73
Drug cost, 2024
$3.3M
23,198 prescriptions
Company payments, 2025
$349
From 2 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Cassandra Williams was code 99309 (snf e&m), 644 times for 159 patients. In total Cassandra Williams billed 826 services in 10 codes, and Medicare paid $70K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2020-10-30.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99309 SNF E&M | Facility | 644 | 159 | $75.17 | $48K |
| 99306 SNF E&M | Facility | 138 | 107 | $129.86 | $18K |
| 99497 Care Management/Coordination | Facility | 16 | 16 | $56.68 | $907 |
| 99316 SNF E&M | Facility | 12 | 12 | $89.78 | $1,077 |
By year: 2022 $88K for 1,247 services; 2023 $69K for 829 services; 2024 $70K for 826 services.
Medicare prescription drug claims, 2024
In 2024, the drug Cassandra Williams prescribed most often to Medicare patients was Levothyroxine Sodium, with 1,190 prescriptions and refills. In total Cassandra Williams wrote 23,198 Medicare prescriptions that cost $3.3M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Levothyroxine Sodium Generic | 1,190 | 1,190 | 69 | $11K |
| Eliquis Apixaban | 755 | 755 | 67 | $223K |
| Amlodipine Besylate Generic | 753 | 753 | 98 | $10K |
| Atorvastatin Calcium Generic | 743 | 743 | 107 | $17K |
| Furosemide Generic | 697 | 697 | 61 | $4,563 |
| Sertraline Hcl Generic | 521 | 521 | 49 | $14K |
| Duloxetine Hcl Generic | 512 | 512 | 50 | $21K |
| Pantoprazole Sodium Generic | 486 | 486 | 73 | $18K |
| Levetiracetam Generic | 475 | 475 | 52 | $40K |
| Divalproex Sodium Generic | 446 | 446 | 49 | $45K |
| Lisinopril Generic | 437 | 437 | 61 | $7,446 |
| Metformin Hcl Generic | 427 | 427 | 50 | $8,307 |
| Metoprolol Succinate Generic | 413 | 413 | 60 | $13K |
| Gabapentin Generic | 405 | 405 | 52 | $13K |
| Quetiapine Fumarate Generic | 361 | 361 | 33 | $17K |
Brand drugs: 6,098 claims; generic drugs: 16,982 claims; opioid claims: 68.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Cassandra Williams $349 ($349 in general payments such as food, travel and fees) from 2 companies. The largest payer was Cook Medical LLC with $224.
| Company | Payments | Amount |
|---|---|---|
| Cook Medical LLC | 2 | $224 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 1 | $125 |
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.