Internal Medicine, Nephrology · Johnson City, TN
NPI
1407363989
Since 2018
Specialty
Internal Medicine, Nephrology
Code 207RN0300X
Group practices
1
Medicare group memberships
Hospitals
1
Hospital affiliations
107 Woodlawn Dr Ste 200
Johnson City, TN, 37604
Phone (423) 929-7158
Groups this clinician bills Medicare through
Medicare paid, 2024
$23K
190 services
Medicare patients, 2024
93
Average age 70
Drug cost, 2024
$648K
1,222 prescriptions
Company payments, 2025
$1,419
From 16 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Cynthia K Marsh was code 99213 (office e&m - established), 46 times for 30 patients. In total Cynthia K Marsh billed 190 services in 8 codes, and Medicare paid $23K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2026-08-21.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99213 Office E&M - Established | Office | 46 | 30 | $58.42 | $2,687 |
| 90961 ESRD Related Services (not dialysis) | Office | 43 | 31 | $180.58 | $7,765 |
| 90960 ESRD Related Services (not dialysis) | Office | 24 | 20 | $226.05 | $5,425 |
| 90962 ESRD Related Services (not dialysis) | Office | 13 | 13 | $130.02 | $1,690 |
By year: 2022 $23K for 166 services; 2023 $19K for 154 services; 2024 $23K for 190 services.
Medicare prescription drug claims, 2024
In 2024, the drug Cynthia K Marsh prescribed most often to Medicare patients was Sevelamer Carbonate, with 150 prescriptions and refills. In total Cynthia K Marsh wrote 1,222 Medicare prescriptions that cost $648K.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Sevelamer Carbonate Generic | 150 | 222 | 44 | $23K |
| Lidocaine-Prilocaine Lidocaine/Prilocaine | 70 | 82 | 13 | $1,726 |
| Furosemide Generic | 67 | 149 | 27 | $391 |
| Xphozah Tenapanor Hcl | 63 | 95 | 14 | $279K |
| Clinisol Parenteral Amino Acid 15% No.5 | 51 | 51 | Under 11 | $10K |
| Velphoro Sucroferric Oxyhydroxide | 50 | 56 | 15 | $170K |
| Amlodipine Besylate Generic | 48 | 99 | 16 | $157 |
| Auryxia Ferric Citrate | 45 | 51 | 11 | $58K |
| Calcium Acetate Generic | 40 | 63 | 14 | $2,896 |
| Midodrine Hcl Generic | 38 | 64 | 15 | $2,423 |
| Veltassa Patiromer Calcium Sorbitex | 38 | 41 | Under 11 | $37K |
| Trazodone Hcl Generic | 32 | 40 | Under 11 | $129 |
| Ondansetron Hcl Generic | 31 | 31 | 16 | $501 |
| Lokelma Sodium Zirconium Cyclosilicate | 30 | 40 | Under 11 | $28K |
| Losartan Potassium Generic | 29 | 63 | 11 | $188 |
Brand drugs: 271 claims; generic drugs: 951 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Cynthia K Marsh $1,419 ($1,419 in general payments such as food, travel and fees) from 16 companies. The largest payer was Akebia Therapeutics Inc with $368.
| Company | Payments | Amount |
|---|---|---|
| Akebia Therapeutics Inc AKBA | 8 | $368 |
| Travere Therapeutics, Inc. TVTX | 16 | $329 |
| Bayer Healthcare Pharmaceuticals Inc. BAYN.DE | 11 | $170 |
| AstraZeneca Pharmaceuticals LP AZN | 8 | $162 |
| Novartis Pharmaceuticals Corporation NVS | 4 | $81.22 |
| Otsuka America Pharmaceutical, Inc. 4578.T | 3 | $51.38 |
| Fresenius USA Marketing, Inc. | 2 | $37.84 |
| Calliditas Therapeutics US Inc. | 1 | $35.3 |
| Amgen Inc. AMGN | 2 | $35.24 |
| Daiichi Sankyo Inc. 4568.T | 1 | $28.13 |
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.