Physician Profile
Edward K. Onuma, M.D., PhD
Unclaimed ProfileAbout Dr. Onuma
Listed in the NPI registry as a specialist, Edward K. Onuma, M.D., PhD practices in San Mateo, CA. Edward graduated from State University of Ny Upstate Medical University in 1990. According to Medicare claims data, Edward cared for 733 Medicare patients across 788 services. The services billed most often include biopsy of large bowel using a flexible endoscope, new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more, and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more.
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
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (650) 342-7432
- Email not available
Practice Locations
100 SOUTH ELLSWORTH AVENUE SUITE 507
San Mateo, CA 94401
Procedures Most Often Billed to Medicare
788 services · 733 patients · 11 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Biopsy of large bowel using a flexible endoscope | Procedure | 45380 |
156 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | Procedure | 43239 |
93 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | Procedure | 45385 |
82 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
146 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
133 |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
57 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
31 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | Office visit | 99223 |
30 |
| Colorectal cancer screening; colonoscopy on individual at high risk | Billing code | G0105 |
29 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
19 |
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 specialists at this location 1
Same specialty, same street address — most likely the same department or group.
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 specialists in San Mateo 7
Same specialty, same city.
More connections — 24 related providers in 3 groups
Trained at State University of Ny Upstate Medical University 8
Other providers in the same specialty who trained at the same institution.
Class of 1990 at State University of Ny Upstate Medical University 8
Providers who graduated from the same medical school in the same year.
Also performs Biopsy of large bowel using a flexible endoscope 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. Onuma specialize in?
Dr. Onuma is a specialist in San Mateo, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Dr. Onuma located?
Dr. Onuma is listed at 100 South Ellsworth Avenue Suite 507, San Mateo, CA 94401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Onuma's phone number?
The number on file is (650) 342-7432. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Onuma's NPI number?
Dr. Onuma's National Provider Identifier is 1477559722. 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. Onuma go to medical school?
Dr. Onuma attended State University of Ny Upstate Medical University, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Onuma been practicing?
Dr. Onuma has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Onuma do most often?
According to Medicare billing data, Dr. Onuma performs procedures including biopsy of large bowel using a flexible endoscope, biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope and removal of polyps or growths of large bowel using an endoscope with mechanical snare, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Onuma confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Onuma. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.