Physician Profile
Unclaimed ProfileAbout O'BRIEN
Based in Portland, OR, David Patrick O'Brien, MD is listed in the NPI registry under colorectal surgery (proctology). David graduated from Emory University School of Medicine in 1997. David is also listed as specialising in surgery and colon & rectal surgery.
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. O'Brien?
Dr. O'Brien is a colorectal surgery (proctology) in Portland, OR. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “COLORECTAL SURGERY (PROCTOLOGY)”.
NPI registry
What is Dr. O'Brien's address?
Dr. O'Brien is listed at 4805 NE GLISAN ST SUITE 6N60, Portland, OR 97213. 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. O'Brien?
The number on file is (503) 281-0561. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. O'Brien's NPI number?
Dr. O'Brien's National Provider Identifier is 1669440350. 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 train?
Dr. O'Brien attended Emory University School of Medicine, graduating in 1997. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. O'Brien been practising?
Dr. O'Brien has 29 years experience. Calculated from a graduation year of 1997, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. O'Brien perform?
According to Medicare billing data, Dr. O'Brien performs procedures including diagnostic exam of rectum and lower large bowel using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. O'Brien confirmed this information?
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
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (503) 281-0561
- Email not available
Practice Locations
4805 NE GLISAN ST SUITE 6N60
Portland, OR 97213
Procedures Most Often Billed to Medicare
137 services · 130 patients · 6 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Diagnostic exam of rectum and lower large bowel using an endoscope | Procedure | 45300 |
35 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
28 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
25 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
22 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
16 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
11 |
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.
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.
Other colorectal surgery specialists in Portland 8
Same specialty, same city.
Trained at Emory University School of Medicine 7
Other providers in the same specialty who trained at the same institution.
More connections — 9 related providers in 2 groups
Class of 1997 at Emory University School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of rectum and lower large bowel using an endoscope 1
Providers in OR 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.