Physician Profile
Unclaimed ProfileAbout O'BRIEN
Denis P O'Brien, MD is a healthcare provider in Olney, MD specializing in orthopedic surgery. Denis trained at Georgetown University School of Medicine, graduating in 1983. Denis is also listed as specializing in orthopaedic surgery. Medicare claims data shows Denis provided 58,070 services to 3,287 patients.
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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (301) 774-0500
- Email not available
Practice Locations
3414 OLANDWOOD CT
Olney, MD 20832
Procedures Most Often Billed to Medicare
58,070 services · 3,287 patients · 25 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
658 |
| Aspiration and/or injection of fluid large joint using ultrasound guidance | Procedure | 20611 |
231 |
| Replacement of knee joint, both sides of knee | Procedure | 27447 |
32 |
| Computer-assisted surgery for muscle and bone procedure | Procedure | 20985 |
31 |
| Injection of trigger points, 1-2 muscles | Procedure | 20552 |
30 |
| Injection into tendon or ligament | Procedure | 20550 |
18 |
| X-ray of knee, 1-2 views | Imaging | 73560 |
430 |
| X-ray of shoulder, minimum of 2 views | Imaging | 73030 |
175 |
| X-ray of lower and sacral spine, 2-3 views | Imaging | 72100 |
140 |
| X-ray of hip, 2-3 views | Imaging | 73502 |
137 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other orthopedic surgeons at this location 5
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
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 — 27 related providers in 4 groups
Other orthopedic surgeons in Olney 3
Same specialty, same city.
Trained at Georgetown University School of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1983 at Georgetown University School of Medicine 8
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 MD who bill this service to Medicare most often.
Common questions
What does Dr. O'Brien specialize in?
Dr. O'Brien is an orthopedic surgeon in Olney, MD. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “ORTHOPEDIC SURGERY”.
NPI registry
Where is Dr. O'Brien located?
Dr. O'Brien is listed at 3414 OLANDWOOD CT, Olney, MD 20832. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Brien's phone number?
The number on file is (301) 774-0500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. O'Brien?
Dr. O'Brien's National Provider Identifier is 1427053339. 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. O'Brien go to medical school?
Dr. O'Brien attended Georgetown University School of Medicine, graduating in 1983. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. O'Brien have?
Dr. O'Brien has 43 years experience. Calculated from a graduation year of 1983, reported in the CMS National Downloadable File.
CMS public data
What does Dr. O'Brien do most often?
According to Medicare billing data, Dr. O'Brien performs procedures including aspiration and/or injection of fluid from large joint, aspiration and/or injection of fluid large joint using ultrasound guidance and replacement of knee joint, both sides of knee; reads or performs imaging such as x-ray of knee, 1-2 views and x-ray of shoulder, minimum of 2 views, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. O'Brien's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Brien. If this is you, claiming it is free.
Guide.md
Is this your profile?
Verify your identity to control how patients — and AI assistants — describe you.
Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.