Mark Jeffery Irby, PA-C
Surgical Physician Assistant · Houston, TX
Mark Jeffery Irby, PA-C is a surgical physician assistant with a practice address in Houston, Texas, and NPI 1174967780, issued on Apr 25, 2013. Check the license (Texas PA08327, as entered in NPPES) with the Texas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mark Jeffery Irby
- Credential
- PA-C
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License numbers
- PA08327 TX
PA219358 OR
Self-reported in NPPES; status is on the state search - Practice location
- 6400 Fannin St, Houston, TX 77030
- Phone
- (713) 486-7550
- Enumerated
- Apr 25, 2013
- Record last updated
- Mar 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20250909003935); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 1,350 in Texas → Look up another NPI →
Also registered at 6400 Fannin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mark Jeffery Irby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Texas board licenses this profession
Search for license PA08327Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average surgical physician assistant in 2024
24 Medicare Part D claims for 20 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Meloxicam13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 82.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Regenerative Orthopedic Center LLCTigard, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Jeffery Irby among 1,350 surgical physician assistant records in Texas
Mark Jeffery Irby, PA-C is one of 1,350 surgical physician assistant records with a practice address in Texas. 55% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 47% of them.
- NPI issued2013 · 47% of these records are older, 50% newer
- In a Medicare fileYes · 55% of these records are
- In the CMS Doctors and Clinicians fileYes · 46% of these records are
- Graduated2012 · median 2016 among the 617 with a school on file
- Record last updated2026 · 52% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a Texas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in Texas
There are 1,350 surgical physician assistant records in Texas.
All 1,350 in Texas → Every provider in Houston → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Troy Barry, PA-CHouston, TX 770301447297080
- Fonteyn Beck, PA-CHouston, TX 770301427058197
- Boris Bratovich, PACHouston, TX 770301053311720
- Kelly Brown, PA-CHouston, TX 770301952397291
- Jose Delgado, PA-CHouston, TX 770301366489130
- Megan Generale, PA-CHouston, TX 770301194710525
- John Hoef, PA-CHouston, TX 770301083604318
- Denise Horowitz, PA-CHouston, TX 770301053358697
Common questions
What is Mark Jeffery Irby, PA-C's NPI number?
Mark Jeffery Irby, PA-C's National Provider Identifier (NPI) is 1174967780, issued on Apr 25, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Mark Jeffery Irby, PA-C located?
The NPPES record lists a practice address at 6400 Fannin St, Houston, TX, 77030. Phone: (713) 486-7550. Providers update this record themselves, so call before visiting.
How can I verify Mark Jeffery Irby, PA-C's license?
NPPES lists Texas license number PA08327, as entered by the provider. Search the Texas board that licenses this profession; the NPPES record confirms identity only.
How much does Mark Jeffery Irby, PA-C prescribe under Medicare Part D?
In 2024, Mark Jeffery Irby, PA-C had 24 Medicare Part D claims for 20 beneficiaries; the average among surgical physician assistant prescribers was 304. Part D covers Medicare prescriptions only.
What is Mark Jeffery Irby, PA-C's MIPS final score?
The 2023 MIPS final score is 82.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.