Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mark C. Littlejohn, MD PLLC

Organization Otolaryngology Physician · NPI 1588020283

Mark C. Littlejohn, MD PLLC is an Otolaryngology Physician in Frisco, Texas. Licensed in Texas. Registered with an NPI since 2016.

Licensed in
TX
In the registry since
2016
What do these letters mean?
PLLC — Professional limited liability company
A form of business registration, not a clinical qualification.

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Practice location Address checks out

8380 Warren Pkwy Ste 504
Frisco, TX 75034-4198
Phone: (972) 596-4005
Fax: (972) 985-1253
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence H5784 (TX)

Record details

NPI number1588020283
Entity typeOrganization (Type 2)
Organization subpartNo
Authorized official Mark Littlejohn — Owner · (972) 596-4005
NPI enumeratedJanuary 11, 2016
Last updated in NPPESJanuary 11, 2016
Mailing address8380 Warren Pkwy, Suite 504, Frisco, TX 75034-4198

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