Physician Assistant · Worcester, MA
NPI
1861537458
Since 2007
Specialty
Physician Assistant
Code 363A00000X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
456 Park Avenue
Worcester, MA, 01610
Phone (508) 796-5661
Groups this clinician bills Medicare through
Medicare paid, 2024
$8,712
155 services
Medicare patients, 2024
47
Average age 67
Drug cost, 2024
$2.3M
34,416 prescriptions
Company payments, 2025
$343
From 5 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Tam Chang was code 99214 (office e&m - established), 65 times for 35 patients. In total Tam Chang billed 155 services in 8 codes, and Medicare paid $8,712.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2011-05-12.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Office | 65 | 35 | $45.44 | $2,954 |
| 99213 Office E&M - Established | Office | 56 | 27 | $40.50 | $2,268 |
| G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | Office | 21 | 21 | $111.47 | $2,341 |
By year: 2022 $17K for 308 services; 2023 $14K for 239 services; 2024 $8,712 for 155 services.
Medicare prescription drug claims, 2024
In 2024, the drug Tam Chang prescribed most often to Medicare patients was Atorvastatin Calcium, with 2,597 prescriptions and refills. In total Tam Chang wrote 34,416 Medicare prescriptions that cost $2.3M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Atorvastatin Calcium Generic | 2,597 | 2,847 | 270 | $17K |
| Losartan Potassium Generic | 2,063 | 2,252 | 215 | $11K |
| Metoprolol Succinate Generic | 1,749 | 1,898 | 173 | $16K |
| Amlodipine Besylate Generic | 1,503 | 1,606 | 161 | $4,429 |
| Metformin Hcl Er Metformin Hcl | 1,314 | 1,404 | 121 | $7,757 |
| Ibandronate Sodium Generic | 1,134 | 1,163 | 114 | $7,470 |
| Omeprazole Generic | 1,012 | 1,062 | 141 | $6,736 |
| Gabapentin Generic | 857 | 857 | 105 | $4,258 |
| Lidocaine Generic | 801 | 804 | 101 | $57K |
| Lisinopril Generic | 738 | 799 | 78 | $3,506 |
| Rosuvastatin Calcium Generic | 715 | 761 | 71 | $5,830 |
| Levocetirizine Dihydrochloride Generic | 693 | 710 | 140 | $1,597 |
| Tamsulosin Hcl Generic | 693 | 738 | 76 | $5,561 |
| Farxiga Dapagliflozin Propanediol | 597 | 618 | 99 | $337K |
| Memantine Hcl Er Memantine Hcl | 592 | 605 | 62 | $12K |
Brand drugs: 4,941 claims; generic drugs: 28,573 claims; opioid claims: 473.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Tam Chang $343 ($343 in general payments such as food, travel and fees) from 5 companies. The largest payer was Sumitomo Pharma America, Inc. with $163.
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.