Registry record
- NPI
- 1356781579
- Profession
- Physician Assistant (PA)
- Specialty
- Physician Assistant (363A00000X)
- Practice address
- 1807 W Slaughter Ln, Ste 490
Austin, TX 78748 - Phone
- 5122828967
- In the registry since
- July 2, 2013
- Last NPPES update
- September 24, 2021
- Sole proprietor
- No
- License
- PA05678 (TX)
At this location
This location lists no other NP or PA providers in our current data.
In context
The NPI number of Kathryn Siems is 1356781579. They are a Physician Assistant in Austin, Texas.
Kathryn Siems is one of 644 Physician Assistants in Austin and one of 11,405 across Texas in our data. Austin ranks #4 among Texas cities in our dataset, with 2,782 NP and PA providers.
The NPI has been in the federal registry for 12 years, since July 2, 2013.
Frequently asked questions
What is NPI 1356781579?
NPI 1356781579 is the 10-digit National Provider Identifier assigned to Kathryn Siems, a Physician Assistant practicing in Austin, Texas. The record has been in the NPPES registry since July 2, 2013.
How do I verify this provider?
Cross-check NPI 1356781579 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license PA05678 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 September 24, 2021. 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.