Doctor profile · Federal record
Dr. Edward Onuma, M.D.,PHD
Specialist (CMS: Gastroenterology) · San Mateo, CA
- NPI 1477559722
- Accepts Medicare
- MIPS 90.9 / 100 · 2023
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
100 South Ellsworth Avenue, Suite 507
San Mateo, CA 944012708
(650) 342-7432
fax (650) 342-3239
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- February 21, 2008
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 174400000X — NUCC code
- State license (1)
- California #00G855080
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1477559722. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
909
Distinct HCPCS
9
Medicare allowed
$139,587
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99203 |
New patient office or other outpatient visit, 30-44 minutes | 150 | 150 | $132 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 147 | 147 | $159 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 138 | 113 | $151 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 138 | 58 | $89 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 118 | 117 | $114 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 75 | 75 | $285 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 62 | 60 | $197 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 49 | 49 | $197 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 32 | 32 | $204 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 327. This provider delivers 2.8× the peer median.Open Payments
Industry payments received
All-time total
$160
Transactions
3
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Madrigal Pharmaceuticals | 1 | $109.20 | |
| ABBVIE INC. | 2 | $50.63 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,071
Patients
476
Total drug cost
$133,259
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 267 | 96 | $5,360 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,mag Sulfates) | Brand | 233 | 230 | $17,896 |
| Omeprazole | Generic | 212 | 60 | $4,269 |
| Famotidine | Generic | 112 | 36 | $2,538 |
| Sucralfate | Generic | 65 | 19 | $5,077 |
| Peg 3350-Electrolyte (Sodium Chloride/Nahco3/Kcl/Peg) | Brand | 35 | 35 | $903 |
| Mesalamine | Generic | 31 | 0 | $35,805 |
| Creon (Lipase/Protease/Amylase) | Brand | 22 | 0 | $29,178 |
| Dicyclomine Hcl | Generic | 19 | 0 | $358 |
| Budesonide Ec (Budesonide) | Brand | 13 | 0 | $14,926 |
Hospital affiliations
Frequently asked questions
What is Dr. Edward Onuma's medical specialty?
Dr. Edward Onuma practices Specialist in San Mateo, CA.
Where does Dr. Edward Onuma practice?
Dr. Edward Onuma practices at 100 South Ellsworth Avenue, San Mateo, CA 944012708. Office phone: 6503427432.
What is Dr. Edward Onuma's NPI?
Dr. Edward Onuma's National Provider Identifier (NPI) is 1477559722, issued by NPPES.
Does Dr. Edward Onuma accept Medicare assignment?
Yes. Dr. Edward Onuma accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Edward Onuma commonly perform?
Top Medicare-reported procedures in 2023: New patient office or other outpatient visit (HCPCS 99203); Biopsy of large bowel using a flexible endoscope (HCPCS 45380); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.