Internal Medicine, Gastroenterology · Lexington, KY
NPI
1992731269
Since 2006
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
1221 S Broadway
Lexington, KY, 40504
Phone (859) 258-4950
Groups this clinician bills Medicare through
Medicare paid, 2024
$106K
1,354 services
Medicare patients, 2024
547
Average age 73
Drug cost, 2024
$535K
1,596 prescriptions
Company payments, 2025
$5,203
From 24 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by An-Yu Chen was code 45380 (lower gi endoscopy - other), 163 times for 162 patients. In total An-Yu Chen billed 1,354 services in 28 codes, and Medicare paid $106K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-06-12.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 45380 Lower GI Endoscopy - Other | Facility | 163 | 162 | $63.24 | $10K |
| 45385 Colonoscopy - Lesion Removal | Facility | 130 | 130 | $195.34 | $25K |
| G0105 Colorectal cancer screening; colonoscopy on individual at high risk | Facility | 129 | 129 | $164.68 | $21K |
| 43239 Upper GI Endoscopy | Facility | 103 | 102 | $71.27 | $7,341 |
| 99213 Office E&M - Established | Office | 75 | 64 | $57.96 | $4,347 |
| 43450 Digestive/Gastrointestinal | Facility | 73 | 73 | $30.08 | $2,196 |
| 99214 Office E&M - Established | Office | 71 | 53 | $83.76 | $5,947 |
| 43235 Upper GI Endoscopy | Facility | 46 | 46 | $71.87 | $3,306 |
| G0121 Colorectal cancer screening; colonoscopy on individual not meeting criteria for high risk | Facility | 44 | 44 | $166.59 | $7,330 |
| 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 | 32 | 29 | $11.48 | $367 |
| 99204 Office E&M - New | Office | 22 | 22 | $105.10 | $2,312 |
| 45378 Lower GI Endoscopy - Other | Facility | 16 | 16 | $122.60 | $1,962 |
| 99203 Office E&M - New | Office | 12 | 12 | $69.86 | $838 |
By year: 2022 $103K for 1,201 services; 2023 $105K for 955 services; 2024 $106K for 1,354 services.
Medicare prescription drug claims, 2024
In 2024, the drug An-Yu Chen prescribed most often to Medicare patients was Gavilyte-G (Peg3350/Sod Sulf,bicarb,cl/Kcl), with 430 prescriptions and refills. In total An-Yu Chen wrote 1,596 Medicare prescriptions that cost $535K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Gavilyte-G Peg3350/Sod Sulf,bicarb,cl/Kcl | 430 | 430 | 410 | $6,947 |
| Peg-3350 And Electrolytes Peg3350/Sod Sulf,bicarb,cl/Kcl | 130 | 130 | 129 | $2,085 |
| Sod Sulf-Potass Sulf-Mag Sulf Sodium, Potassium,mag Sulfates | 110 | 121 | 110 | $7,863 |
| Omeprazole Generic | 96 | 226 | 37 | $680 |
| Colestipol Hcl Generic | 70 | 177 | 28 | $8,750 |
| Rabeprazole Sodium Generic | 50 | 124 | 18 | $1,713 |
| Linzess Linaclotide | 49 | 71 | 13 | $37K |
| Pantoprazole Sodium Generic | 44 | 106 | 19 | $529 |
| Budesonide Dr Budesonide | 35 | 51 | 11 | $4,338 |
| Lorazepam Generic | 31 | 41 | Under 11 | $157 |
| Amitriptyline Hcl Generic | 30 | 82 | 11 | $302 |
| Alosetron Hcl Generic | 26 | 47 | Under 11 | $39K |
| Budesonide Er Budesonide | 25 | 29 | Under 11 | $33K |
| Famotidine Generic | 23 | 44 | Under 11 | $128 |
| Dicyclomine Hcl Generic | 22 | 41 | Under 11 | $717 |
Brand drugs: 405 claims; generic drugs: 1,191 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid An-Yu Chen $5,203 ($5,203 in general payments such as food, travel and fees) from 24 companies. The largest payer was Abbvie Inc. with $1,309.
| Company | Payments | Amount |
|---|---|---|
| Abbvie Inc. ABBV | 44 | $1,309 |
| Janssen Biotech, Inc. JNJ | 32 | $805 |
| Gilead Sciences, Inc. GILD | 13 | $354 |
| Ardelyx, Inc. ARDX | 12 | $304 |
| Takeda Pharmaceuticals U.S.A., Inc. TAK | 12 | $297 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC BHC | 12 | $276 |
| Phathom Pharmaceuticals, Inc. PHAT | 13 | $221 |
| Pfizer Inc. PFE | 12 | $220 |
| Lilly USA, LLC LLY | 6 | $205 |
| Madrigal Pharmaceuticals MDGL | 5 | $194 |
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.