MARK JEFFERY IRBY PA-C
NPI 1174967780
Physician Assistant - Surgical in Houston, TX

Q: What is Mark Irby's NPI number?

The NPI number for Mark Irby is 1174967780. It was assigned to this individual provider in the NPPES registry on April 25, 2013.

Q: What is Mark Irby's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Q: When was this NPI record last updated?

The NPPES record for Mark Irby was last updated on March 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since April 25, 2013PECOS EnrolledAccepts Medicare Assignment

82.38/100

CMS Quality Rating

6400 FANNIN ST, STE 1700, HOUSTON, TX 77030(713) 486-7550 Get Directions Write a Review

NPPES record last updated: March 11, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 11, 2026, Sep 15, 2025 (2 updates tracked since 2025).

On this page

About Mark Jeffery Irby Pa-c NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARK JEFFERY IRBY PA-C (NPI 1174967780) is an individual surgical provider in Houston, Texas, licensed in Texas (PA08327) and active in the NPI registry since April 2013. He is enrolled in Medicare PECOS, is affiliated with Providence Willamette Falls Medical Center, and maintains 3 additional practice locations.

NPPES Registry Identity

NPI1174967780

Entity TypeIndividualMale

Primary Taxonomy363AS0400X

Provider Legal NameMARK JEFFERY IRBYCredential: PA-C

Location Address6400 FANNIN ST, STE 1700Houston, TX 77030-1521

Mailing Address7401 Sw Washo Ct Ste 100Tualatin, OR 97062-8342

Phone(713) 486-7550

Sole ProprietorNo

Medical School CMSBaylor College Of MedicineGraduated 2012

Enumeration DateApril 25, 2013

Last NPPES UpdateMarch 11, 20262 updates tracked since enumeration

NPPES CertifiedMarch 11, 2026

✔ NPI 1174967780 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · SurgicalPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code363AS0400X

License✔ Licensed in TX · PA08327

Also ListedPhysician AssistantTaxonomy 363A00000X · License PA219358 (OR)

6400 FANNIN ST, Houston, TX 77030

Open in Google Maps ↗

Secondary Practice Locations 3

Location 16485 SW Borland Rd Ste ATualatin, OR 97062-9762 · Phone (503) 665-0836

Location 21508 Division St Ste 105Oregon City, OR 97045-1584 · Phone (503) 547-6083

Location 37401 SW Washo Ct Ste 100Tualatin, OR 97062-8342 · Phone (503) 665-0836

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include BridgeSpan Health Company, Community Health Choice, Molina Healthcare and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Mark Jeffery Irby Pa-c is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1951541168

PECOS Enrollment IDI20250909003935

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Aspiration and/or injection of fluid from large joint 20610

This procedure involves using a needle to remove (aspiration) or introduce (injection) fluid into a large joint like the knee or hip. It can help diagnose conditions, relieve discomfort, or deliver medication directly to the joint.

34 services19 patients

X-ray of knee, 4 or more views 73564

An X-ray of the knee, 4 or more views, is a non-invasive imaging test. It involves capturing multiple images of your knee from different angles. This helps in diagnosing conditions such as fractures, arthritis, or infections. The procedure is quick and painless.

26 services21 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

23 services22 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

18 services18 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Providence Willamette Falls Medical Center

Acute Care Hospitals · Oregon City, OR

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number380038

Location1500 Division StreetOregon City, OR 97045 · Clackamas County

Emergency services Birthing friendly

Legacy Meridian Park Medical Center

Acute Care Hospitals · Tualatin, OR

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number380089

Location19300 SW 65th AvenueTualatin, OR 97062 · Washington County

Emergency services Birthing friendly

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

82.38/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

79.23

Promoting Interoperability

100

Improvement Activities

Cost

58.5

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

TEXAS MEDICAL CENTER DENTAL

Dentist (General Practice)

6400 FANNIN ST, SUITE 2040
HOUSTON, TX 77030

Harris County (713) 795-0608

SCOTT JAMES RYAN MD

Surgery (Vascular Surgery)

6400 FANNIN ST
HOUSTON, TX 77030

Harris County (713) 486-5100

KRISTIN WHANGER PACINI PA

Physician Assistant (Surgical)

6400 FANNIN ST, 1700
HOUSTON, TX 77030

Harris County (713) 486-1800

DR. RANA OMAR AFIFI MD

Surgery (Vascular Surgery)

6400 FANNIN ST, SUITE NUMBER 2850
HOUSTON, TX 77030

Harris County (713) 486-5100

DR. MICHAEL S SWEENEY M.D.,

Thoracic Surgery (Cardiothoracic Vascular Surgery)

6400 FANNIN ST, STE 3000
HOUSTON, TX 77030

Harris County (713) 790-0841

BAYLOR COLLEGE OF MEDICINE, DEPARTMENT OF ORTHOPEDIC SURGERY

Orthopaedic Surgery

6400 FANNIN ST, SUITE 1620
HOUSTON, TX 77030

Harris County (713) 740-2200

TARA L WEGRYN MD PA

Specialist

6400 FANNIN ST, SUITE 2295
HOUSTON, TX 77030

Harris County (713) 791-9778

JORDANNA ESPANOLA MSN, RN, FNP-C

Nurse Practitioner (Family)

6400 FANNIN ST, SUITE 1400
HOUSTON, TX 77030

Harris County (281) 914-9756

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Mark Irby's NPI number?

The NPI number for Mark Irby is 1174967780. It was assigned to this individual provider in the NPPES registry on April 25, 2013.

Where is Mark Irby located?

Mark Irby practices at 6400 Fannin St Ste 1700, Houston, TX 77030. The listed phone number is (713) 486-7550.

What is Mark Irby's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Surgical, with taxonomy code 363AS0400X.

Is Mark Irby enrolled in Medicare?

Yes. Mark Irby is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Mark Irby accept?

Health plans from BridgeSpan Health Company, Community Health Choice, Molina Healthcare and Regence BlueCross BlueShield of Oregon list Mark Irby as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Mark Irby affiliated with any hospitals?

According to CMS data, Mark Irby is affiliated with Providence Willamette Falls Medical Center and Legacy Meridian Park Medical Center.

When was this NPI record last updated?

The NPPES record for Mark Irby was last updated on March 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.