Active NPI 1174967780 Individual Practitioner Male Practitioner

Mark Jeffery Irby , PA-C

Physician Assistant - Surgical • Houston, TX

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Mark Irby, PA-C is a certified Physician Assistant - Surgical practicing in Houston, TX. With approximately 14 years of clinical experience since graduating from Baylor College Of Medicine in 2012, Mark Irby delivers high-quality medical care to the local community at 6400 FANNIN ST.

Mark Irby is affiliated with Regenerative Orthopedic Center Llc and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, methylprednisolone acetate, 1 mg, aspiration and/or injection of fluid from large joint, x-ray of knee. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

6400 Fannin St
Ste 1700

Houston, TX 770301521

Telephone 7134867550

Associated Practice Facility / Clinic

🏢 Memorial Hermann Health System Facility NPI 1437189115

Medicare Profile & Education

Medical School

Baylor College Of Medicine

Graduation Year

2012

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant - Surgical in Houston, TX

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

14 Yrs +2.7 yrs vs City Avg

City Avg: 11.3 Yrs

State Avg: 12.1 Yrs

Regional Practice Density

367 Specialists

Practicing in Houston, TX (1367 Statewide)

Telehealth Adoption Rate

3.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

71.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Irby (14 Years) 14 Yrs

Houston Specialty Average (11.3 Years) 11.3 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J1010 Injection, methylprednisolone acetate, 1 mg	1,120	12	$0.33	$0.13
20610 Aspiration and/or injection of fluid from large joint	34	19	$354.43	$63.94
73564 X-ray of knee, 4 or more views	26	21	$159.00	$39.97
99213 Established patient office or other outpatient visit, typically 15 minutes	23	22	$223.00	$77.91
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$240.00	$95.99

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
20610 Aspiration and/or injection of fluid from large joint	34	17	$340.62	$61.98
99213 Established patient office or other outpatient visit, typically 15 minutes	30	27	$223.00	$78.88
J1030 Injection, methylprednisolone acetate, 40 mg	26	12	$20.00	$7.58
73564 X-ray of knee, 4 or more views	19	15	$159.00	$41.00
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	16	16	$240.00	$98.23

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
73564 X-ray of knee, 4 or more views	33	27	$159.00	$41.41
20610 Aspiration and/or injection of fluid from large joint	31	13	$373.58	$68.26
99213 Established patient office or other outpatient visit, typically 15 minutes	25	21	$223.00	$79.72
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	24	24	$240.00	$98.36

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	50	33	$223.00	$80.70
20610 Aspiration and/or injection of fluid from large joint	40	17	$402.99	$69.14
73564 X-ray of knee, 4 or more views	33	24	$159.00	$40.87
J1030 Injection, methylprednisolone acetate, 40 mg	23	11	$16.00	$5.68

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	30	27	$154.27	$66.22
73564 X-ray of knee, 4 or more views	21	17	$159.00	$38.63
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$240.00	$95.26

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	55	41	$152.78	$62.89
J1030 Injection, methylprednisolone acetate, 40 mg	51	20	$11.00	$6.10
20610 Aspiration and/or injection of fluid from large joint	48	25	$365.17	$55.62
73564 X-ray of knee, 4 or more views	28	23	$159.00	$35.64
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$240.00	$93.76

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J1030 Injection, methylprednisolone acetate, 40 mg	44	18	$11.00	$6.61
99213 Established patient office or other outpatient visit, typically 15 minutes	32	24	$146.88	$62.19
20610 Aspiration and/or injection of fluid from large joint	31	20	$221.06	$61.53
73564 X-ray of knee, 4 or more views	24	20	$132.50	$33.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	15	15	$223.13	$92.53

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J1030 Injection, methylprednisolone acetate, 40 mg	33	14	$10.82	$5.34
20610 Aspiration and/or injection of fluid from large joint	31	16	$199.00	$63.04
99213 Established patient office or other outpatient visit, typically 15 minutes	31	20	$146.00	$60.50
73564 X-ray of knee, 4 or more views	20	17	$135.15	$32.11
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$217.00	$90.74

Medical Specialties & State Licenses

CMS Verified: 2026-03-11

Physician Assistant - Surgical Primary Specialty

NUCC Taxonomy Code: 363AS0400X

State License TX PA08327

Definition to come...

Physician Assistant

NUCC Taxonomy Code: 363A00000X

State License OR PA219358

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Hospital & Practice Group Affiliations

Regenerative Orthopedic Center Llc

15755 Sw Sequoia Pkwy, Tigard, OR 972247166

Phone: 5036396002

Secondary Practice Locations

1508 Division St Ste 105

Oregon City, OR 970451584

Phone: 5035476083

7401 Sw Washo Ct Ste 100

Tualatin, OR 970628342

Phone: 5036650836

6485 Sw Borland Rd Ste A

Tualatin, OR 970629762

Phone: 5036650836

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

1 Associated Practitioners

Dr. Erica Giles , MD

Orthopaedic Surgery

NPI 1952854002

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

7 Historical Events

📍

Updated Business Mailing Address March 11, 2026

Registered at 7401 SW WASHO CT STE 100, TUALATIN, OR 970628342

✅

NPI Profile Active April 25, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location April 25, 2013

Registered at 6400 FANNIN ST, STE 1700, HOUSTON, TX 770301521 (Tel: 7134867550)

📍

Updated Business Mailing Address April 25, 2013

Registered at 6400 FANNIN ST, STE 1700, HOUSTON, TX 770301521

👤

Provider Name / Credentials Updated April 25, 2013

Recorded as MARK IRBY, PA-C

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 25, 2013

Physician Assistant (License #PA08327 in TX)

🟢

Initial NPI Registration & Enumeration April 25, 2013

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1174967780

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: April 25, 2013

Last Update: March 11, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

7401 Sw Washo Ct Ste 100

Tualatin, OR 970628342

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.