Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mark Urtal Liong, MD

Individual provider Nephrology Physician · NPI 1346422078

Dr. Mark Urtal Liong, MD is a Nephrology in McAllen, Texas. Qualified in 2004, 22 years ago. Practices with South Texas Kidney Specialists, PA, a 15-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
22
Licensed in
TX
In the registry since
2007
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1901 S 1st St Ste 600
McAllen, TX 78503-1228
Phone: (956) 631-6136
Fax: (956) 631-1848
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nephrology Physician (primary) Taxonomy 207RN0300X · Licence P4673 (TX)

Record details

NPI number1346422078
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedDecember 5, 2007
Last updated in NPPESJanuary 8, 2015

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNEPHROLOGY
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice South Texas Kidney Specialists, P.A. — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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