Registry record
- NPI
- 1679440325
- Profession
- Nurse Practitioner (NP)
- Specialty
- Nurse Practitioner (363L00000X)
- Practice address
- 2483 W Interstate 40
Amarillo, TX 79109 - Phone
- 8064633200
- In the registry since
- October 18, 2025
- Last NPPES update
- April 4, 2026
- Sole proprietor
- No
- License
- 833761 (TX)
At this location
This location lists no other NP or PA providers in our current data.
In context
The NPI number of Cassandra Markham is 1679440325. They are a Nurse Practitioner in Amarillo, Texas.
Cassandra Markham is one of 106 Nurse Practitioners in Amarillo and one of 6,739 across Texas in our data. Amarillo ranks #17 among Texas cities in our dataset, with 520 NP and PA providers.
Frequently asked questions
What is NPI 1679440325?
NPI 1679440325 is the 10-digit National Provider Identifier assigned to Cassandra Markham, a Nurse Practitioner practicing in Amarillo, Texas. The record has been in the NPPES registry since October 18, 2025.
How do I verify this provider?
Cross-check NPI 1679440325 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license 833761 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 April 4, 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.