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

Heather Hollingsworth Hallmark, MSN, APRN-C, AGPCNP

Individual provider Nurse Practitioner · NPI 1922505593

Heather Hollingsworth Hallmark, MSN, APRN-C, AGPCNP is a Nurse Practitioner in Oklahoma City, Oklahoma. Licensed in Oklahoma. Registered with an NPI since 2018.

Licensed in
OK
In the registry since
2018
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.

See every abbreviation used in this directory →

Practice location Address checks out

921 NE 13th St
Oklahoma City, OK 73104-5007
Phone: (405) 456-3409
Fax: (405) 456-5390
Show map & directions

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

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 99801 (OK)

Record details

NPI number1922505593
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , APRN-C , AGPCNP
Sole proprietorNo
NPI enumeratedApril 10, 2018
Last updated in NPPESFebruary 9, 2022
Certification dateFebruary 9, 2022

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