Internal Medicine, Gastroenterology · Flushing, NY
NPI
1225053523
Since 2006
Specialty
Internal Medicine, Gastroenterology
Code 207RG0100X
Group practices
1
Medicare group memberships
Hospitals
0
Hospital affiliations
3808 Union St, Ste 3n
Flushing, NY, 11354
Phone (516) 238-6855
Groups this clinician bills Medicare through
Medicare paid, 2024
$170K
1,216 services
Medicare patients, 2024
302
Average age 74
Drug cost, 2024
$3.0M
5,650 prescriptions
Company payments, 2025
$2,807
From 15 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Sing Chan was code J0171 (injection, adrenalin, epinephrine, 0.1 mg), 229 times for 57 patients. In total Sing Chan billed 1,216 services in 36 codes, and Medicare paid $170K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2018-09-18.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J0171 Injection, adrenalin, epinephrine, 0.1 mg | Office | 229 | 57 | $0.62 | $142 |
| 99212 Office E&M - Established | Office | 196 | 148 | $40.85 | $8,006 |
| 43239 Upper GI Endoscopy | Office | 143 | 139 | $339.86 | $49K |
| 99214 Office E&M - Established | Office | 115 | 94 | $101.72 | $12K |
| 99213 Office E&M - Established | Office | 115 | 88 | $70.18 | $8,071 |
| 99203 Office E&M - New | Office | 57 | 57 | $81.52 | $4,647 |
| 36415 Venipuncture Blood Collection | Office | 44 | 36 | $8.45 | $372 |
| 45385 Colonoscopy - Lesion Removal | Office | 43 | 43 | $395.83 | $17K |
| 46250 Digestive/Gastrointestinal | Office | 32 | 28 | $400.01 | $13K |
| 91200 Standard X-ray | Office | 29 | 29 | $23.25 | $674 |
| 45350 Lower GI Endoscopy - Other | Office | 25 | 24 | $617.59 | $15K |
| 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 | 23 | 17 | $14.22 | $327 |
| 46221 Digestive/Gastrointestinal | Office | 22 | 20 | $256.37 | $5,640 |
| 45378 Lower GI Endoscopy - Other | Office | 20 | 20 | $287.51 | $5,750 |
| 99202 Office E&M - New | Office | 17 | 17 | $45.88 | $780 |
By year: 2022 $265K for 4,475 services; 2023 $191K for 3,085 services; 2024 $170K for 1,216 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 44 | 36 | $8.45 | $372 |
Medicare prescription drug claims, 2024
In 2024, the drug Sing Chan prescribed most often to Medicare patients was Famotidine, with 818 prescriptions and refills. In total Sing Chan wrote 5,650 Medicare prescriptions that cost $3.0M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Famotidine Generic | 818 | 866 | 323 | $26K |
| Omeprazole Generic | 749 | 859 | 335 | $6,392 |
| Amoxicillin Generic | 465 | 465 | 313 | $2,794 |
| Linzess Linaclotide | 424 | 434 | 142 | $233K |
| Vemlidy Tenofovir Alafenamide | 348 | 376 | 54 | $528K |
| Hydrocortisone Generic | 275 | 285 | 112 | $3,168 |
| Metoclopramide Hcl Generic | 248 | 248 | 240 | $149 |
| Procto-Med Hc Hydrocortisone | 189 | 198 | 88 | $2,069 |
| Ibsrela Tenapanor Hcl | 189 | 416 | 106 | $717K |
| Mesalamine Generic | 131 | 148 | 30 | $32K |
| Dexlansoprazole Dr Dexlansoprazole | 125 | 149 | 37 | $23K |
| Gavilyte-G Peg3350/Sod Sulf,bicarb,cl/Kcl | 122 | 122 | 117 | $2,318 |
| Omeprazole-Sodium Bicarbonate Omeprazole/Sodium Bicarbonate | 84 | 92 | 11 | $149K |
| Voquezna Vonoprazan Fumarate | 81 | 81 | 20 | $52K |
| Xifaxan Rifaximin | 80 | 80 | 50 | $210K |
Brand drugs: 1,573 claims; generic drugs: 4,077 claims; opioid claims: 15.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Sing Chan $2,807 ($2,807 in general payments such as food, travel and fees) from 15 companies. The largest payer was Gilead Sciences, Inc. with $440.
| Company | Payments | Amount |
|---|---|---|
| Gilead Sciences, Inc. GILD | 18 | $440 |
| Ardelyx, Inc. ARDX | 11 | $307 |
| Abbvie Inc. ABBV | 15 | $262 |
| Intra-Sana Laboratories | 13 | $259 |
| Madrigal Pharmaceuticals MDGL | 11 | $240 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC BHC | 14 | $232 |
| Pfizer Inc. PFE | 8 | $217 |
| Janssen Biotech, Inc. JNJ | 9 | $214 |
| Phathom Pharmaceuticals, Inc. PHAT | 7 | $173 |
| Amgen Inc. AMGN | 9 | $154 |
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.