Clinical Nurse Specialist: NPI taxonomy code 364S00000X

Taxonomy code 364S00000X is Clinical Nurse Specialist, in the Physician Assistants & Advanced Practice Nursing Providers group.

1,927 active NPIs list it as their primary specialty (<0.1% of all).

Code	364S00000X
Group	Physician Assistants & Advanced Practice Nursing Providers
Classification	Clinical Nurse Specialist
Used for	individual providers (the code is in NUCC's Individual section)
Active NPIs, primary specialty	1,927 (1,847 individuals, 80 organizations)

What NUCC says: A registered nurse who, through a graduate degree program in nursing, or through a formal post-basic education program or continuing education courses and clinical experience, is expert in a specialty area of nursing practice within one or more of the components of direct patient/client care,… (excerpt of the NUCC 26.1 definition)

Find Clinical Nurse Specialist providers

Search the registry for providers listing Clinical Nurse Specialist. Pick a state to narrow it down.

Where they are

State	Active NPIs	Share
Ohio	244	12.7%
California	167	8.7%
Illinois	164	8.5%
Texas	161	8.4%
Minnesota	146	7.6%
Oklahoma	76	3.9%
Michigan	69	3.6%
Indiana	68	3.5%
Massachusetts	60	3.1%
Wisconsin	56	2.9%

Top states by practice location, from the NPPES file of September 13, 2026.

Related specialties

Specialty definitions are from the NUCC Health Care Provider Taxonomy (version 26.1). Which code to use on a claim depends on your NPPES record and your payer. See taxonomy codes explained.