Physician Profile
Unclaimed ProfileAbout KOO
Patrick Koo, MD is a healthcare provider in Fullerton, CA specialising in internal medicine. Patrick trained at Pennsylvania State University College of Medicine, graduating in 2012. Patrick is also listed as specialising in gastroenterology.
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 does Dr. Koo specialise in?
Dr. Koo is an internal medicine in Fullerton, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “INTERNAL MEDICINE”.
NPI registry
Where is Dr. Koo located?
Dr. Koo is listed at 1837 SUNNY CREST DR, Fullerton, CA 92835. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Koo's phone number?
The number on file is (714) 446-5831. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Koo's NPI number?
Dr. Koo's National Provider Identifier is 1801152772. 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. Koo go to medical school?
Dr. Koo attended Pennsylvania State University College of Medicine, graduating in 2012. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Koo been practising?
Dr. Koo has 14 years experience. Calculated from a graduation year of 2012, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Koo do most often?
According to Medicare billing data, Dr. Koo performs procedures including biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope, removal of polyps or growths of large bowel using an endoscope with mechanical snare and biopsy of large bowel using a flexible endoscope; provides treatments such as imaging of digestive tract done from the inside of the digestive tract, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Koo confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Koo. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (714) 446-5831
- Email not available
Practice Locations
1837 SUNNY CREST DR
Fullerton, CA 92835
Procedures Most Often Billed to Medicare
1,306 services · 1,162 patients · 22 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
139 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
123 |
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
95 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43235 |
33 |
| Insertion of guide wire with dilation of esophagus using a flexible endoscope | Procedure | 43248 |
27 |
| Removal of large bowel tissue using a flexible endoscope | Procedure | 45390 |
20 |
| Diagnostic exam of large bowel using a flexible endoscope | Procedure | 45378 |
18 |
| Destruction of polyp or growth of large bowel using a flexible endoscope | Procedure | 45388 |
15 |
| Injection beneath lining of large bowel using a flexible endoscope | Procedure | 45381 |
15 |
| Imaging of digestive tract done from the inside of the digestive tract | Treatment | 91110 |
22 |
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 internal medicines at this location 1
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 1
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 internal medicines in Fullerton 8
Same specialty, same city.
Trained at Pennsylvania State University College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 2012 at Pennsylvania State University College of Medicine 7
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 8
Providers in CA 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.