Internal Medicine, Rheumatology · Knoxville, TN
NPI
1154732436
Since 2014
Specialty
Internal Medicine, Rheumatology
Code 207RR0500X
Group practices
1
Medicare group memberships
Hospitals
2
Hospital affiliations
1932 Alcoa Highway, Medical Building C, Suite 550
Knoxville, TN, 37920
Phone (865) 305-6543
Groups this clinician bills Medicare through
Medicare paid, 2024
$31K
421 services
Medicare patients, 2024
195
Average age 72
Drug cost, 2024
$8.3M
2,872 prescriptions
Company payments, 2025
$2,573
From 18 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Marcum Collins was code 99214 (office e&m - established), 243 times for 133 patients. In total Marcum Collins billed 421 services in 12 codes, and Medicare paid $31K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2023-06-05.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99214 Office E&M - Established | Facility | 243 | 133 | $65.11 | $16K |
| 99214 Office E&M - Established | Office | 85 | 53 | $91.54 | $7,781 |
| 99205 Office E&M - New | Facility | 29 | 29 | $134.42 | $3,898 |
| 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 | Facility | 13 | 13 | $12.78 | $166 |
By year: 2022 $31K for 426 services; 2023 $28K for 403 services; 2024 $31K for 421 services.
Medicare prescription drug claims, 2024
In 2024, the drug Marcum Collins prescribed most often to Medicare patients was Hydroxychloroquine Sulfate, with 473 prescriptions and refills. In total Marcum Collins wrote 2,872 Medicare prescriptions that cost $8.3M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Hydroxychloroquine Sulfate Generic | 473 | 1,130 | 130 | $24K |
| Methotrexate Methotrexate Sodium | 328 | 431 | 55 | $3,958 |
| Humira(Cf) Pen Adalimumab | 327 | 327 | 35 | $2.7M |
| Enbrel Sureclick Etanercept | 244 | 254 | 33 | $1.8M |
| Prednisone Generic | 210 | 411 | 65 | $2,078 |
| Leflunomide Generic | 196 | 258 | 36 | $6,355 |
| Orencia Clickject Abatacept | 109 | 109 | 14 | $601K |
| Rasuvo Methotrexate/Pf | 101 | 105 | 15 | $56K |
| Actemra Actpen Tocilizumab | 73 | 73 | Under 11 | $240K |
| Rinvoq Upadacitinib | 71 | 71 | 12 | $440K |
| Methylprednisolone Generic | 70 | 70 | 58 | $512 |
| Otezla Apremilast | 63 | 63 | Under 11 | $286K |
| Allopurinol Generic | 62 | 150 | 16 | $608 |
| Sulfasalazine Generic | 47 | 83 | 13 | $1,506 |
| Colchicine Generic | 41 | 70 | 13 | $1,993 |
Brand drugs: - claims; generic drugs: 1,515 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Marcum Collins $2,573 ($2,573 in general payments such as food, travel and fees) from 18 companies. The largest payer was Abbvie Inc. with $504.
| Company | Payments | Amount |
|---|---|---|
| Abbvie Inc. ABBV | 40 | $504 |
| Amgen Inc. AMGN | 28 | $497 |
| Novartis Pharmaceuticals Corporation NVS | 20 | $331 |
| UCB, Inc. UCB.BR | 8 | $259 |
| Pfizer Inc. PFE | 9 | $238 |
| AstraZeneca Pharmaceuticals LP AZN | 8 | $174 |
| Janssen Biotech, Inc. JNJ | 6 | $127 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | 3 | $89.01 |
| Mallinckrodt Hospital Products Inc. | 2 | $80.37 |
| Sandoz Inc. SDZ.SW | 2 | $66.81 |
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.