Internal Medicine, Rheumatology · Smithtown, NY
NPI
1083770580
Since 2006
Specialty
Internal Medicine, Rheumatology
Code 207RR0500X
Group practices
1
Medicare group memberships
Hospitals
0
Hospital affiliations
222 Middle Country Road, Suite 312
Smithtown, NY, 11787
Phone (631) 724-8900
Groups this clinician bills Medicare through
Medicare paid, 2024
$860K
72,076 services
Medicare patients, 2024
393
Average age 74
Drug cost, 2024
$3.1M
1,327 prescriptions
Company payments, 2025
$3,078
From 14 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Mark Tan was code J1010 (injection, methylprednisolone acetate, 1 mg), 25,910 times for 94 patients. In total Mark Tan billed 72,076 services in 34 codes, and Medicare paid $860K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2011-07-27.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| J1010 Injection, methylprednisolone acetate, 1 mg | Office | 25,910 | 94 | $0.10 | $2,719 |
| J9312 Injection, rituximab, 10 mg | Office | 4,700 | 20 | $61.23 | $288K |
| J0897 Injection, denosumab, 1 mg | Office | 4,500 | 50 | $20.43 | $92K |
| J1745 Injection, infliximab, excludes biosimilar, 10 mg | Office | 4,450 | 12 | $24.98 | $111K |
| J2001 Injection, lidocaine hcl for intravenous infusion, 10 mg | Office | 684 | 80 | $0.02 | $14.01 |
| 36415 Venipuncture Blood Collection | Office | 583 | 318 | $8.65 | $5,043 |
| 99212 Office E&M - Established | Office | 525 | 213 | $44.00 | $23K |
| J2919 Injection, methylprednisolone sodium succinate, 5 mg | Office | 450 | 11 | $0.22 | $99.74 |
| 99214 Office E&M - Established | Office | 355 | 245 | $88.90 | $32K |
| 96374 Injection Administration | Office | 313 | 112 | $30.04 | $9,404 |
| 96413 Chemotherapy Administration | Office | 304 | 64 | $107.61 | $33K |
| 20610 Joint Injection | Office | 301 | 93 | $66.21 | $20K |
| 99213 Office E&M - Established | Office | 278 | 187 | $67.36 | $19K |
| J7321 Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose | Office | 260 | 40 | $57.20 | $15K |
| 96415 Chemotherapy Administration | Office | 214 | 41 | $22.98 | $4,917 |
By year: 2022 $641K for 26,301 services; 2023 $696K for 44,175 services; 2024 $860K for 72,076 services.
Lab tests billed to Medicare, 2024
| Test code | Tests | Patients | Paid per test | Medicare paid |
|---|---|---|---|---|
| 36415 Venipuncture Blood Collection | 583 | 318 | $8.65 | $5,043 |
Medicare prescription drug claims, 2024
In 2024, the drug Mark Tan prescribed most often to Medicare patients was Prednisone, with 154 prescriptions and refills. In total Mark Tan wrote 1,327 Medicare prescriptions that cost $3.1M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Prednisone Generic | 154 | 162 | 78 | $1,030 |
| Actemra Tocilizumab | 90 | 90 | 13 | $397K |
| Prolia Denosumab | 88 | 519 | 57 | $152K |
| Gabapentin Generic | 82 | 114 | 28 | $1,120 |
| Hydroxychloroquine Sulfate Generic | 54 | 91 | 12 | $1,224 |
| Rinvoq Upadacitinib | 46 | 46 | Under 11 | $289K |
| Xeljanz Xr Tofacitinib Citrate | 45 | 45 | Under 11 | $240K |
| Celecoxib Generic | 40 | 48 | 22 | $894 |
| Remicade Infliximab | 36 | 43 | Under 11 | $288K |
| Diclofenac Sodium Generic | 35 | 56 | 18 | $563 |
| Methotrexate Methotrexate Sodium | 34 | 46 | 11 | $405 |
| Benlysta Belimumab | 31 | 31 | Under 11 | $126K |
| Colchicine Generic | 29 | 45 | 15 | $3,660 |
| Olumiant Baricitinib | 25 | 33 | Under 11 | $107K |
| Naproxen Generic | 22 | 36 | 12 | $136 |
Brand drugs: 536 claims; generic drugs: 791 claims; opioid claims: 25.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Mark Tan $3,078 ($3,078 in general payments such as food, travel and fees) from 14 companies. The largest payer was Janssen Biotech, Inc. with $849.
| Company | Payments | Amount |
|---|---|---|
| Janssen Biotech, Inc. JNJ | 24 | $849 |
| Abbvie Inc. ABBV | 21 | $589 |
| Amgen Inc. AMGN | 22 | $456 |
| Novartis Pharmaceuticals Corporation NVS | 17 | $388 |
| Pfizer Inc. PFE | 19 | $257 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 4 | $109 |
| Genentech USA, Inc. ROG.SW | 4 | $79.63 |
| GlaxoSmithKline, LLC. GSK | 4 | $68.99 |
| UCB, Inc. UCB.BR | 2 | $66.33 |
| AstraZeneca Pharmaceuticals LP AZN | 3 | $54.95 |
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.