Physician Profile
Unclaimed ProfileAbout IRBY
Mark Jeffery Irby, PA-C is a physician assistant based in Houston, TX. Mark is a 2012 graduate of Baylor College of Medicine. Mark is also listed as specialising in physician assistant — surgical. According to Medicare claims data, Mark cared for 92 Medicare patients across 1,221 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Irby?
Dr. Irby is a physician assistant in Houston, TX. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “PHYSICIAN ASSISTANT”.
NPI registry
What is Dr. Irby's address?
Dr. Irby is listed at 6400 FANNIN ST STE 1700, Houston, TX 77030. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Irby?
The number on file is (713) 486-7550. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Irby's NPI number?
Dr. Irby's National Provider Identifier is 1174967780. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Irby train?
Dr. Irby attended Baylor College of Medicine, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Irby been practising?
Dr. Irby has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Irby perform?
According to Medicare billing data, Dr. Irby performs procedures including aspiration and/or injection of fluid from large joint; reads or performs imaging such as x-ray of knee, 4 or more views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Irby confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Irby. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (713) 486-7550
- Email not available
Practice Locations
6400 FANNIN ST STE 1700
Houston, TX 77030
Procedures Most Often Billed to Medicare
1,221 services · 92 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
34 |
| X-ray of knee, 4 or more views | Imaging | 73564 |
26 |
| Injection, methylprednisolone acetate, 1 mg | Drug given | J1010 |
1,120 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
23 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
18 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
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Claim this profileRelated providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other physician assistants at this location 3
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 4
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 31 related providers in 4 groups
Other physician assistants in Houston 8
Same specialty, same city.
Trained at Baylor College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2012 at Baylor College of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in TX who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.