Registry record
- NPI
- 1639609852
- Profession
- Nurse Practitioner (NP)
- Specialty
- Nurse Practitioner (363L00000X)
- Practice address
- 1251 Sadler East Dr, Building J, Suite 2100
San Marcos, TX 78666 - Phone
- 5123965603
- In the registry since
- June 20, 2017
- Last NPPES update
- January 13, 2026
- Sole proprietor
- No
- License
- AP132131 (TX)
At this location
This location lists no other NP or PA providers in our current data.
In context
The NPI number of Mary Hearne is 1639609852. They are a Nurse Practitioner in San Marcos, Texas.
Mary Hearne is one of 21 Nurse Practitioners in San Marcos and one of 6,739 across Texas in our data.
The NPI has been in the federal registry for 9 years, since June 20, 2017.
Frequently asked questions
What is NPI 1639609852?
NPI 1639609852 is the 10-digit National Provider Identifier assigned to Mary Hearne, a Nurse Practitioner practicing in San Marcos, Texas. The record has been in the NPPES registry since June 20, 2017.
How do I verify this provider?
Cross-check NPI 1639609852 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license AP132131 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 January 13, 2026. 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.