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


Quality Rating: 82.38 out of 100 score

NPI Status: Active since April 25, 2013

Contact Information

6400 FANNIN ST
STE 1700
HOUSTON, TX
ZIP 77030
Phone: (713) 486-7550

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  • Individual
  • Male
  • Years of Experience 14
  • Physician Assistant
  • Surgical
  • Accepts Insurance
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About MARK IRBY

This page provides the complete NPI Profile along with additional information for Mark Irby, a provider established in Houston, Texas with a medical specialization in Physician Assistant, focusing in surgical and more than 14 years of experience. He graduated from Baylor College Of Medicine in 2012. The healthcare provider is registered in the NPI registry with number 1174967780 assigned on April 2013. The practitioner's primary taxonomy code is 363AS0400X with license number PA08327 (TX). The provider is registered as an individual and his NPI record was last updated March 2026.

NPI
1174967780
Provider Name
MARK JEFFERY IRBY PA-C
Gender
Male
Entity Type
Individual
Location Address
6400 FANNIN ST STE 1700 HOUSTON, TX 77030
Location Phone
(713) 486-7550
Mailing Address
7401 SW WASHO CT STE 100 TUALATIN, OR 97062
Medical School Name
BAYLOR COLLEGE OF MEDICINE
Graduation Year
2012
Is Sole Proprietor?
No
Enumeration Date
04-25-2013
Last Update Date
03-11-2026
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Location Map

Secondary Locations

  • 1508 Division St Ste 105
    Oregon City, OR 97045
    (503) 547-6083
  • 6485 SW Borland Rd Ste A
    Tualatin, OR 97062
    (503) 665-0836
  • 7401 SW Washo Ct Ste 100
    Tualatin, OR 97062
    (503) 665-0836

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Physician Assistant Surgical

Taxonomy Code
363AS0400X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
PA08327
License State
TX

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1363A00000XPhysician Assistants & Advanced Practice Nursing Providers

Physician Assistant

PA219358 (OR)

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

  • BridgeSpan Standard Bronze Plan - EPO
  • BridgeSpan Standard Gold Plan - EPO
  • BridgeSpan Standard Silver Plan - EPO
  • Community Premier Bronze 003 (No deductible for PCP, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Premier Bronze 018 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Premier Gold 005 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Premier Gold 021 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Premier Silver 012 (No deductible for PCP, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Premier Silver 020 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Select Bronze 016 (No deductible for PCP, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Select Gold 022 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Community Select Silver 019 (No deductible for PCP, Specialist, Urgent Care & Generics, $0 PCP 24/7 Virtual Care Options) - HMO
  • Molina Gold Core 1640 - HMO
  • Molina Gold Core 1640 Plus with Adult Dental and Vision - HMO
  • Molina Gold Core 1640 Plus with Adult Vision - HMO
  • Molina Gold Saver 750 - HMO
  • Molina Gold Saver 750 Plus with Adult Dental and Vision - HMO
  • Molina Gold Saver 750 Plus with Adult Vision - HMO
  • Molina Gold Standard - HMO
  • Molina Silver Core - HMO
  • Molina Silver Core Plus with Adult Dental and Vision - HMO
  • Molina Silver Core Plus with Adult Vision - HMO
  • Molina Silver Saver with Four Free PCP Visits - HMO
  • Molina Silver Standard - HMO
  • Bronze 8000 Individual Connect - EPO
  • Bronze Essential 9000 With 4 Copay No Deductible Office Visits Individual Connect - EPO
  • Bronze Essential 9000 With 4 Copay No Deductible Office Visits Legacy - EPO
  • Bronze HSA 7000 Individual Connect - EPO
  • Gold 2300 Individual Connect - EPO
  • Gold 2300 Legacy - EPO
  • Regence Standard Bronze Plan Individual Connect - EPO
  • Regence Standard Bronze Plan Legacy - EPO
  • Regence Standard Gold Plan Individual Connect - EPO
  • Regence Standard Gold Plan Legacy - EPO
  • Regence Standard Silver Plan Individual Connect - EPO
  • Regence Standard Silver Plan Legacy - EPO
  • Silver 6500 Individual Connect - EPO
  • Silver 6500 Legacy - EPO

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Medicare Participation & PECOS Enrollment Status

Mark Irby is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Mark Irby is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 1951541168

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20250909003935

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Aspiration and/or injection of fluid from large joint

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.

This service was performed 31 times for 13 patients

Established patient office or other outpatient visit, 20-29 minutes

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.

This service was performed 25 times for 21 patients

New patient office or other outpatient visit, 30-44 minutes

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.

This service was performed 24 times for 24 patients

X-ray of knee, 4 or more views

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.

This service was performed 33 times for 27 patients

Overall MIPS Quality Performance

The provider participated in CMS Quality Payment Program under the Merit-based Incentive Payment System (MIPS) and has an overall final score of 82.38, based on four performance areas: quality, improvement activities, promoting interoperability, and cost. The purpose of this information is to help people with Medicare make informed decisions and incentivize doctors and clinicians to maximize performance.

The Merit-based Incentive Payment System (MIPS) is a way providers could use to participate in CMS Quality Payment Program (QPP). The MIPS program affects clinician reimbursement for Part B covered professional services and also rewards them for improving the quality of patient care and outcomes.

  • Final Score: 82.38 out of 100

    The MIPS program evaluates providers across multiple categories with a specific weight for each category resulting a in a MIPS final score that ranges from 0 to 100 points. The MIPS Final Score determines whether providers receive a negative, neutral or positive MIPS payment adjustment.

  • Quality Score: 79.23

    The Quality category assesses providers performance on clinical practices and patient outcomes under the traditional MIPS program. The quality measures help identify the quality of healthcare processes, outcomes, and patient experiences. The Quality measure category compromises 40% providers final MPIS scores.

    There are six collection types for MIPS quality measures: Electronic Clinical Quality Measures (eCQMs), MIPS Clinical Quality Measures (CQMs), Qualified Clinical Data Registry (QCDR) Measures, Medicare Part B claims measures, CMS Web Interface measures and The Consumer Assessment of Healthcare Providers and Systems (CAHPS) for MIPS Survey.

  • Promoting Interoperability Score: 100

    The Interoperability category measures the providers ability to use technology to exchange and make use of healthcare information in a way that is less burdensome and improves outcomes. The Interoperability measure category compromises 25% providers final MPIS scores.

    The MIPS Interoperability measure focuses on the use of certified electronic health record technology (CEHRT) to improve patient access health information, the exchange of information between clinicians and pharmacies and the systematic collection, analysis, and interpretation of healthcare data.

  • Improvement Activities Score: 40

    The Improvement Activities performance category evaluates the providers participation in clinical activities that support the improvement of clinical practice, care delivery, and outcomes. Providers have the option to choose 2 to 4 activities from an inventory of over 100 improvement activities. Providers typically choose the activities that best fit their needs. The improvement activities measure category compromises 15% providers final MPIS scores.

    The Improvement measures aim to better patient engagement, patient safety and other areas of patient care. The Improvement Activities category compromises 15% of providers final MPIS scores.

  • Cost Score: 58.5

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

  • Cost Score: 58.5

    The Cost performance category asses the amount and types of services provided and how clinicians coordinate care and seek improvement of health outcomes by ensuring patients receive the appropriate services.

    Although providers don't determine the price of healthcare services they are important in delivering high-quality care at a reasonable cost. The Cost measures category compromises 20% of providers final MPIS scores.

Find Provider Hospital Affiliations - Privileges

Doctors and physicians must apply for hospital privileges to treat patients at hospitals. Find out if your doctor has privileges to practice at your preferred hospital by using the hospital affiliation information below based on recent medical claims.

Hospital affiliation is identified through self-reporting data, inpatient, outpatient, physician and ancillary service claims linked by the medical claims NPI number and place of service code. Additionally, to further determine provider hospital affiliation the clinician must have provided services to at least three patients on three different dates in the last 12 months. Mark Irby is affiliated with the following medical facilities:

Hospital Name Address Phone Hospital Type Overall Rating
PROVIDENCE WILLAMETTE FALLS MEDICAL CENTER1500 DIVISION STREET
OREGON CITY, OR 97045
(503) 659-6915Acute Care Hospitals
LEGACY MERIDIAN PARK MEDICAL CENTER19300 SW 65TH AVENUE
TUALATIN, OR 97062
(503) 692-2182Acute Care Hospitals

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NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1174967780, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 70. The final step is to find the difference between that total and the next multiple of ten (70 - 70 = 0).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
1
Unchanged
Pos 3
7
Doubled → 14 → 1 + 4
Pos 4
4
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
6
Unchanged
Pos 7
7
Doubled → 14 → 1 + 4
Pos 8
7
Unchanged
Pos 9
8
Doubled → 16 → 1 + 6
Check
0
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 7 → 14 → 5 9 → 18 → 9 7 → 14 → 5 8 → 16 → 7

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 1 + 1 + 4 + 4 + 1 + 8 + 6 + 1 + 4 + 7 + 1 + 6 + 24 = 70

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 70 is 70. The difference is the calculated check digit.

70 - 70 = 0
This NPI is valid
The calculated check digit is 0, which matches the last digit of 1174967780.

Other Providers at the Same Location


The following 20 providers are registered at the same or a nearby location.

Internal Medicine (Cardiovascular Disease)
6400 FANNIN ST, #3000
HOUSTON, TX 77030
Internal Medicine (Cardiovascular Disease)
6400 FANNIN ST, SUITE 3000
HOUSTON, TX 77030
Ophthalmology
6400 FANNIN ST, 18 FLOOR
HOUSTON, TX 77030
Nurse Anesthetist, Certified Registered
6400 FANNIN ST, SUITE 1500
HOUSTON, TX 77030
Specialist
6400 FANNIN ST, SUITE 2210A
HOUSTON, TX 77030
Internal Medicine (Critical Care Medicine)
6400 FANNIN ST, SUITE 2280
HOUSTON, TX 77030
Ophthalmology
6400 FANNIN ST, SUITE 1800
HOUSTON, TX 77030
Optometrist
6400 FANNIN ST, 18TH FLOOR
HOUSTON, TX 77030
Psychiatry & Neurology (Neurology)
6400 FANNIN ST, SUITE 2295
HOUSTON, TX 77030
Obstetrics & Gynecology
6400 FANNIN ST, SUITE 1900
HOUSTON, TX 77030
Obstetrics & Gynecology
6400 FANNIN ST, SUITE 1900
HOUSTON, TX 77030
Internal Medicine (Pulmonary Disease)
6400 FANNIN ST, SUITE 2280
HOUSTON, TX 77030
Nurse Anesthetist, Certified Registered
6400 FANNIN ST, SUITE 1500
HOUSTON, TX 77030
Specialist/Technologist (Athletic Trainer)
6400 FANNIN ST, SUITE 1620
HOUSTON, TX 77030
Specialist
6400 FANNIN ST, SUITE 2300
HOUSTON, TX 77030
Internal Medicine (Critical Care Medicine)
6400 FANNIN ST, 2280
HOUSTON, TX 77030
Registered Nurse (Orthopedic)
6400 FANNIN ST, SUITE 1620
HOUSTON, TX 77030
Clinical Neuropsychologist
6400 FANNIN ST, SUITE 1620
HOUSTON, TX 77030
Thoracic Surgery (Cardiothoracic Vascular Surgery)
6400 FANNIN ST, STE. 2500
HOUSTON, TX 77030
Pediatrics
6400 FANNIN ST, SUITE 2110
HOUSTON, TX 77030

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1174967780, enumerated as an "individual" on April 25, 2013.

The provider is located at 6400 FANNIN ST STE 1700 HOUSTON, TX 77030 and the phone number is (713) 486-7550.

Physician Assistant with taxonomy code 363AS0400X and a focus in Surgical.

The provider might be accepting Accepts: BridgeSpan Health Company, Community Health. Please consult your insurance carrier or call the provider to verify.

Mark Irby is affiliated with: PROVIDENCE WILLAMETTE FALLS MEDICAL CENTER and LEGACY MERIDIAN PARK MEDICAL CENTER.