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

Mark John Schalk, RN

Individual provider Registered Nurse · NPI 1225981749

Mark John Schalk, RN is a Registered Nurse in Del City, Oklahoma. Practices as a sole proprietor. Licensed in Oklahoma.

Licensed in
OK
In the registry since
2026
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.

See every abbreviation used in this directory →

Practice location Address checks out

1900 S Sunnylane Rd
Del City, OK 73115-3102
Phone: (405) 677-5777
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Registered Nurse (primary) Taxonomy 163W00000X · Licence R0079023 (OK)

Record details

NPI number1225981749
Entity typeIndividual (Type 1)
GenderMale
Credentials RN
Sole proprietorYes
NPI enumeratedFebruary 16, 2026
Last updated in NPPESFebruary 16, 2026
Certification dateFebruary 16, 2026
Mailing address10405 Se 23rd St, Midwest City, OK 73130-7639

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