NPI Atlas

Ms. Diane Eileen Johnston, RN FNP

Family Nurse Practitioner in San Marcos, Texas. NPI 1659532430.

NPI1659532430

Registry record

NPI
1659532430
Profession
Nurse Practitioner (NP)
Specialty
Family Nurse Practitioner (363LF0000X)
Practice address
601 University Dr, Student Health Center
San Marcos, TX 78666
Phone
5122452161
In the registry since
June 24, 2008
Last NPPES update
May 20, 2013
Sole proprietor
No
License
681841 (TX)

At this location

6 other providers in our data list 601 University Dr, San Marcos as a practice address:

In context

The NPI number of Diane Johnston is 1659532430. They are a Family Nurse Practitioner in San Marcos, Texas.

Diane Johnston is one of 63 Family Nurse Practitioners in San Marcos and one of 22,499 across Texas in our data.

The NPI has been in the federal registry for 18 years, since June 24, 2008.

Frequently asked questions

What is NPI 1659532430?

NPI 1659532430 is the 10-digit National Provider Identifier assigned to Diane Johnston, a Family Nurse Practitioner practicing in San Marcos, Texas. The record has been in the NPPES registry since June 24, 2008.

How do I verify this provider?

Cross-check NPI 1659532430 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license 681841 with the TX licensing board. You can also run the number through our free NPI validator to confirm its checksum.

Is this information current?

This profile reflects the June 2026 NPPES data file. NPPES lists the record's last update as May 20, 2013. We refresh our data each month when CMS publishes a new file.

Data: NPPES public registry, June 2026 file. Not medical advice. Verify independently before care or credentialing decisions. Errors in the source record can be corrected at nppes.cms.hhs.gov; see our corrections page.