Registry record
- NPI
- 1598154650
- Profession
- Physician Assistant (PA)
- Specialty
- Medical Physician Assistant (363AM0700X)
- Practice address
- 4358 Lockhill Selma Rd Ste 110
San Antonio, TX 78249 - Phone
- 2104924200
- In the registry since
- January 13, 2015
- Last NPPES update
- May 16, 2018
- Sole proprietor
- No
- License
- PA09610 (TX)
At this location
2 other providers in our data list 4358 Lockhill Selma Rd Ste 110, San Antonio as a practice address:
- McKenzie Knapick, PA
Physician Assistant · NPI 1366194920
- Shawn Maliece Mollica, PA-C
Physician Assistant · NPI 1811988157
In context
The NPI number of Karen Williams is 1598154650. They are a Medical Physician Assistant in San Antonio, Texas.
Karen Williams is one of 252 Medical Physician Assistants in San Antonio and one of 2,844 across Texas in our data. San Antonio ranks #3 among Texas cities in our dataset, with 3,972 NP and PA providers.
The NPI has been in the federal registry for 11 years, since January 13, 2015.
Frequently asked questions
What is NPI 1598154650?
NPI 1598154650 is the 10-digit National Provider Identifier assigned to Karen Williams, a Medical Physician Assistant practicing in San Antonio, Texas. The record has been in the NPPES registry since January 13, 2015.
How do I verify this provider?
Cross-check NPI 1598154650 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license PA09610 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 16, 2018. 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.