Internal Medicine, Nephrology · McAllen, TX
NPI
1346422078
Since 2007
Specialty
Internal Medicine, Nephrology
Code 207RN0300X
Group practices
1
Medicare group memberships
Hospitals
3
Hospital affiliations
1901 S 1st St Ste 600
McAllen, TX, 78503
Phone (956) 631-6136
Groups this clinician bills Medicare through
Medicare paid, 2024
$144K
1,089 services
Medicare patients, 2024
245
Average age 71
Drug cost, 2024
$1.1M
1,355 prescriptions
Company payments, 2025
$409
From 6 companies
Procedures and visits billed to Original Medicare, 2024
In 2024, the most common Medicare service billed by Mark U Liong was code 99232 (hospital e&m - subsequent), 230 times for 99 patients. In total Mark U Liong billed 1,089 services in 14 codes, and Medicare paid $144K.
| Code |
|---|
Official US government data: the national provider registry and Medicare enrollment records, linked by NPI. Last update of this record: 2015-01-08.
| Setting |
|---|
| Services |
|---|
| Patients |
|---|
| Paid per service |
|---|
| Medicare paid |
|---|
| 99232 Hospital E&M - Subsequent | Facility | 230 | 99 | $62.10 | $14K |
| 90960 ESRD Related Services (not dialysis) | Office | 229 | 44 | $282.73 | $65K |
| 99233 Hospital E&M - Subsequent | Facility | 220 | 91 | $93.79 | $21K |
| 99214 Office E&M - Established | Office | 93 | 59 | $88.98 | $8,275 |
| 90961 ESRD Related Services (not dialysis) | Office | 79 | 35 | $239.57 | $19K |
| 90935 Hemodialysis | Facility | 53 | 24 | $58.11 | $3,080 |
| 99222 Hospital E&M - Initial | Facility | 30 | 30 | $97.39 | $2,922 |
By year: 2022 $216K for 1,666 services; 2023 $161K for 1,191 services; 2024 $144K for 1,089 services.
Medicare prescription drug claims, 2024
In 2024, the drug Mark U Liong prescribed most often to Medicare patients was Sevelamer Carbonate, with 312 prescriptions and refills. In total Mark U Liong wrote 1,355 Medicare prescriptions that cost $1.1M.
| Drug | Claims | 30-day fills | Patients | Cost |
|---|---|---|---|---|
| Sevelamer Carbonate Generic | 312 | 428 | 64 | $53K |
| Auryxia Ferric Citrate | 278 | 378 | 50 | $691K |
| Nifedipine Er Nifedipine | 83 | 132 | 25 | $1,548 |
| Lokelma Sodium Zirconium Cyclosilicate | 82 | 88 | 22 | $66K |
| Velphoro Sucroferric Oxyhydroxide | 77 | 81 | 16 | $176K |
| Amlodipine Besylate Generic | 54 | 96 | 14 | $180 |
| Veltassa Patiromer Calcium Sorbitex | 52 | 63 | 14 | $62K |
| Losartan Potassium Generic | 51 | 99 | 17 | $344 |
| Farxiga Dapagliflozin Propanediol | 45 | 59 | 12 | $30K |
| Hydralazine Hcl Generic | 35 | 55 | 11 | $415 |
| Lanthanum Carbonate Generic | 28 | 42 | Under 11 | $22K |
| Furosemide Generic | 22 | 37 | Under 11 | $65.99 |
| Lisinopril Generic | 20 | 40 | Under 11 | $67.65 |
| Renvela Sevelamer Carbonate | 17 | 19 | Under 11 | $28K |
| Potassium Chloride Generic | 13 | 23 | Under 11 | $153 |
Brand drugs: 558 claims; generic drugs: 797 claims.
Money and other things of value reported by the companies
In 2025, drug and medical device companies paid Mark U Liong $409 ($409 in general payments such as food, travel and fees) from 6 companies. The largest payer was AstraZeneca Pharmaceuticals LP with $144.
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.