NPI Atlas

Mark Hassler

Acute Care Nurse Practitioner in Fort Sam Houston, Texas. NPI 1871789735.

NPI1871789735

Registry record

NPI
1871789735
Profession
Nurse Practitioner (NP)
Specialty
Acute Care Nurse Practitioner (363LA2100X)
Practice address
3851 Roger Brooke Dr, Brooke Army Medical Center
Fort Sam Houston, TX 78234
Phone
2102215212
In the registry since
September 24, 2007
Last NPPES update
October 8, 2010
Sole proprietor
No
License
0000012787 (TN)

At this location

54 other providers in our data list 3851 Roger Brooke Dr, Fort Sam Houston as a practice address:

In context

The NPI number of Mark Hassler is 1871789735. They are a Acute Care Nurse Practitioner in Fort Sam Houston, Texas.

Mark Hassler is one of 27 Acute Care Nurse Practitioners in Fort Sam Houston and one of 3,743 across Texas in our data.

The NPI has been in the federal registry for 18 years, since September 24, 2007.

Frequently asked questions

What is NPI 1871789735?

NPI 1871789735 is the 10-digit National Provider Identifier assigned to Mark Hassler, a Acute Care Nurse Practitioner practicing in Fort Sam Houston, Texas. The record has been in the NPPES registry since September 24, 2007.

How do I verify this provider?

Cross-check NPI 1871789735 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license 0000012787 with the TN 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 October 8, 2010. 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.