Doctor profile · Federal record
Dr. Mark Liong, M.D.
Nephrology Physician (CMS: Nephrology) · McAllen, TX
- NPI 1346422078
- Accepts Medicare
- 22 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1901 S 1St St Ste 600
McAllen, TX 785031228
(956) 631-6136
fax (956) 631-1848
Credentials & registration
- NPI registered
- December 2007 — 19 yrs on file
- Profile last updated
- January 8, 2015
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207RN0300X — NUCC code
- State license (1)
- Texas #P4673
- Medicaid
- TX #334541501
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346422078. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,133
Distinct HCPCS
9
Medicare allowed
$197,949
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 440 | 139 | $77 | |
90960 |
Dialysis services, 4 or more physician visits per month (20 years or older) | 345 | 70 | $342 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 123 | 73 | $99 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 81 | 62 | $116 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 52 | 28 | $287 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 41 | 40 | $127 | |
90935 |
Hemodialysis procedure with physician evaluation | 27 | 15 | $70 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 12 | 12 | $109 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 12 | 12 | $76 |
In context: peer comparison
Among 5 peers in McAllen Nephrology Physician, average services per provider: 163. This provider delivers 7.0× the peer median.Open Payments
Industry payments received
All-time total
$649
Transactions
23
Manufacturers
4
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Akebia Therapeutics INC | 15 | $307.21 | |
| AstraZeneca Pharmaceuticals Lp | 5 | $149.96 | |
| Medtronic, INC. | 1 | $142.03 | |
| Fresenius USA Marketing, INC. | 2 | $49.80 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,097
Patients
196
Total drug cost
$1,095,045
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Sevelamer Carbonate | Generic | 317 | 59 | $104,494 |
| Auryxia (Ferric Citrate) | Brand | 263 | 46 | $704,234 |
| Nifedipine ER (Nifedipine) | Brand | 85 | 23 | $2,559 |
| Velphoro (Sucroferric Oxyhydroxide) | Brand | 62 | 0 | $118,573 |
| Lokelma (Sodium Zirconium Cyclosilicate) | Brand | 55 | 20 | $49,434 |
| Losartan Potassium | Generic | 52 | 20 | $716 |
| Hydralazine Hcl | Generic | 48 | 15 | $835 |
| Amlodipine Besylate | Generic | 38 | 13 | $266 |
| Lanthanum Carbonate | Generic | 35 | 0 | $33,476 |
| Calcium Acetate | Generic | 30 | 0 | $3,812 |
Frequently asked questions
What is Dr. Mark Liong's medical specialty?
Dr. Mark Liong practices Nephrology Physician in McAllen, TX.
Where does Dr. Mark Liong practice?
Dr. Mark Liong practices at 1901 S 1St St Ste 600, McAllen, TX 785031228. Office phone: 9566316136.
What is Dr. Mark Liong's NPI?
Dr. Mark Liong's National Provider Identifier (NPI) is 1346422078, issued by NPPES.
Does Dr. Mark Liong accept Medicare assignment?
Yes. Dr. Mark Liong accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Liong commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Dialysis services, 4 or more physician visits per month (20 years or older) (HCPCS 90960); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.