Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mark Robert Johnston, AUD, CCC-A

Individual provider Audiologist · NPI 1326295726

Mark Robert Johnston, AUD, CCC-A is a Qualified Audiologist in San Antonio, Texas. Qualified in 2006, 20 years ago. Practices with Alamo ENT Associates, a 4-clinician group and accepts Medicare assignment. Licensed in Texas.

Years since qualifying
20
Licensed in
TX
In the registry since
2008
What do these letters mean?
AUD — Doctor of Audiology
A hearing specialist who tests hearing and fits hearing aids.
CCC-A — Certificate of Clinical Competence in Audiology
An audiologist certified by ASHA.

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Practice location Address checks out

19026 Stone Oak Pkwy Ste 110
San Antonio, TX 78258
Phone: (210) 545-0404
Fax: (210) 614-1003
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Audiologist (primary) Taxonomy 231H00000X · Licence 50770 (TX)

Record details

NPI number1326295726
Entity typeIndividual (Type 1)
GenderMale
Credentials AUD , CCC-A
Sole proprietorNo
NPI enumeratedAugust 27, 2008
Last updated in NPPESAugust 27, 2008
Mailing addressP.O. Box 2679, San Antonio, TX 78299

Medicare enrollment

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

Medicare specialtyQUALIFIED AUDIOLOGIST
Medical schoolOTHER
Graduated 2006 (20 years in practice)
Group practice Alamo Ent Associates — 4 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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