NPI Atlas

Mark Jeffery Irby, PA-C

Surgical Physician Assistant in Houston, Texas. NPI 1174967780.

NPI1174967780

Registry record

NPI
1174967780
Profession
Physician Assistant (PA)
Specialty
Surgical Physician Assistant (363AS0400X)
Practice address
6400 Fannin St, Ste 1700
Houston, TX 77030
Phone
7134867550
In the registry since
April 25, 2013
Last NPPES update
March 11, 2026
Sole proprietor
No
License
PA08327 (TX)

At this location

34 other providers in our data list 6400 Fannin St, Houston as a practice address:

In context

The NPI number of Mark Irby is 1174967780. They are a Surgical Physician Assistant in Houston, Texas.

Mark Irby is one of 457 Surgical Physician Assistants in Houston and one of 1,762 across Texas in our data. Houston ranks #1 among Texas cities in our dataset, with 8,326 NP and PA providers.

The NPI has been in the federal registry for 13 years, since April 25, 2013.

Frequently asked questions

What is NPI 1174967780?

NPI 1174967780 is the 10-digit National Provider Identifier assigned to Mark Irby, a Surgical Physician Assistant practicing in Houston, Texas. The record has been in the NPPES registry since April 25, 2013.

How do I verify this provider?

Cross-check NPI 1174967780 in the official CMS registry at npiregistry.cms.hhs.gov, and confirm license PA08327 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 March 11, 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.