Edward Onuma, M.D.,PHD
NPI 1477559722 · Specialist · San Mateo, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Edward Onuma, M.D.,PHD is a Specialist provider in San Mateo, CA (NPI 1477559722).
Provider details
- NPI number
- 1477559722
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.,PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 00G855080 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
788 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 156 | $152 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 146 | $137 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 133 | $156 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 93 | $111 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 82 | $292 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 306 | 111 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 246 | 241 |
| Omeprazole | 163 | 50 |
| Famotidine | 128 | 45 |
| Sucralfate | 61 | 26 |
| Mesalamine | 37 | 12 |
| Lipase/Protease/Amylasebrand: Creon | 22 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$160 across 3 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-22
- Last updated
- 2008-02-21
Frequently asked questions
- What is Edward Onuma's NPI number?
- Edward Onuma's National Provider Identifier (NPI) is 1477559722, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Edward Onuma's specialty?
- Edward Onuma is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Edward Onuma located?
- Edward Onuma's practice location on file with NPPES is 100 South Ellsworth Avenue, San Mateo, CA 94401-2708.
- What is Edward Onuma's phone number?
- The practice phone number listed in the NPPES registry for Edward Onuma is (650) 342-7432.
- Does Edward Onuma accept Medicare?
- Edward Onuma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Edward Onuma's NPI active?
- Yes — Edward Onuma's NPI (1477559722) is active in the NPPES registry as of the last update on 2008-02-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.