Internal Medicine · Mount Dora, FL
NPI
1881665222
Since 2006
Specialty
Internal Medicine
Code 207R00000X
Group practices
2
Medicare group memberships
Hospitals
1
Hospital affiliations
18550 US Highway 441
Mount Dora, FL, 32757
Phone (352) 735-3755
Groups this clinician bills Medicare through
Medicare paid, 2024
$288K
13,061 services
Medicare patients, 2024
600
Average age 79
Drug cost, 2024
$1.7M
24,806 prescriptions
Company payments, 2025
$908
From 17 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Khai S Chang was code 36415 (venipuncture blood collection), 1,062 times for 489 patients. In total Khai S Chang billed 13,061 services in 155 codes, and Medicare paid $288K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2018-01-11.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 36415 Venipuncture Blood Collection | Office | 1,062 | 489 | $8.65 | $9,186 |
| 99214 Office E&M - Established | Office | 991 | 502 | $84.88 | $84K |
| J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Office | 964 | 104 | $0.73 | $706 |
| 85025 Blood Count | Office | 878 | 463 | $7.61 | $6,682 |
| 80053 Clinical Chemistry | Office | 863 | 461 | $10.35 | $8,932 |
| 83721 Clinical Chemistry | Office | 806 | 450 | $10.29 | $8,294 |
| 80061 Clinical Chemistry | Office | 806 | 450 | $13.12 | $11K |
| 81000 Clinical Chemistry | Office | 756 | 422 | $3.94 | $2,979 |
| G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's | Office | 553 | 376 | $12.26 | $6,781 |
| 83021 Blood Count | Office | 389 | 232 | $17.70 | $6,885 |
| 84443 Clinical Chemistry | Office | 385 | 275 | $16.46 | $6,337 |
| 96372 Injection Administration | Office | 317 | 64 | $9.87 | $3,128 |
| 84439 Clinical Chemistry | Office | 274 | 191 | $8.84 | $2,422 |
| J3420 Injection, vitamin b-12 cyanocobalamin, up to 1000 mcg | Office | 213 | 41 | $0.91 | $195 |
| 82043 Clinical Chemistry | Office | 198 | 175 | $5.66 | $1,121 |
By year: 2022 $463K for 19,081 services; 2023 $383K for 15,753 services; 2024 $288K for 13,061 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 1,062 | 489 | $8.65 | $9,186 |
| 85025 Blood Count | 878 | 463 | $7.61 | $6,682 |
| 80053 Clinical Chemistry | 863 | 461 | $10.35 | $8,932 |
| 83721 Clinical Chemistry | 806 | 450 | $10.29 | $8,294 |
| 80061 Clinical Chemistry | 806 | 450 | $13.12 | $11K |
| 81000 Clinical Chemistry | 756 | 422 | $3.94 | $2,979 |
| 83021 Blood Count | 389 | 232 | $17.70 | $6,885 |
| 84443 Clinical Chemistry | 385 | 275 | $16.46 | $6,337 |
| 84439 Clinical Chemistry | 274 | 191 | $8.84 | $2,422 |
| 82043 Clinical Chemistry | 198 | 175 | $5.66 | $1,121 |
Medicare prescription drug claims, 2024
In 2024, the drug Khai S Chang prescribed most often to Medicare patients was Simvastatin, with 1,459 prescriptions and refills. In total Khai S Chang wrote 24,806 Medicare prescriptions that cost $1.7M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Simvastatin Generic | 1,459 | 4,166 | 447 | $13K |
| Lisinopril Generic | 1,232 | 3,502 | 391 | $9,042 |
| Atorvastatin Calcium Generic | 823 | 2,371 | 262 | $8,054 |
| Metformin Hcl Generic | 794 | 2,231 | 247 | $5,145 |
| Levothyroxine Sodium Generic | 785 | 2,290 | 224 | $8,929 |
| Omeprazole Generic | 641 | 1,750 | 199 | $8,035 |
| Gabapentin Generic | 634 | 1,718 | 235 | $13K |
| Amlodipine Besylate Generic | 513 | 1,450 | 181 | $2,846 |
| Duloxetine Hcl Generic | 510 | 1,291 | 175 | $18K |
| Rosuvastatin Calcium Generic | 483 | 1,411 | 173 | $5,668 |
| Ezetimibe Generic | 460 | 1,351 | 153 | $13K |
| Trazodone Hcl Generic | 453 | 1,246 | 148 | $5,309 |
| Carvedilol Generic | 417 | 1,124 | 139 | $4,082 |
| Metoprolol Tartrate Generic | 386 | 1,118 | 125 | $2,781 |
| Losartan Potassium Generic | 375 | 1,084 | 128 | $3,055 |
Brand drugs: 2,005 claims; generic drugs: 22,672 claims; opioid claims: 282.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Khai S Chang $908 ($908 in general payments such as food, travel and fees) from 17 companies. The largest payer was Amgen Inc. with $259.
| Company | Payments | Amount |
|---|---|---|
| Amgen Inc. AMGN | 5 | $259 |
| Pfizer Inc. PFE | 6 | $125 |
| GlaxoSmithKline, LLC. GSK | 4 | $68.09 |
| Phathom Pharmaceuticals, Inc. PHAT | 1 | $67.59 |
| Novo Nordisk Inc NVO | 2 | $48.01 |
| Merck Sharp & Dohme LLC MRK | 2 | $37.63 |
| Exact Sciences Corporation EXAS | 2 | $37.17 |
| AstraZeneca Pharmaceuticals LP AZN | 2 | $35.98 |
| Lilly USA, LLC LLY | 2 | $35.42 |
| Sumitomo Pharma America, Inc. 4506.T | 2 | $32.7 |
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.