Irene Sonu, MD
NPI 1801100300 · Gastroenterology Physician · Palo Alto, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irene Sonu, MD is a Gastroenterology Physician provider in Palo Alto, CA (NPI 1801100300).
Provider details
- NPI number
- 1801100300
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A117977 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 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
980 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) |
|---|---|---|
| Measurement of Hydrogen in Breath to Test for Stomach and Bowel Symptoms91065 | 147 | $11 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 81 | $105 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 77 | $147 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 73 | $193 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 63 | $108 |
| Biopsy of Large Bowel Using a Flexible Endoscope |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prucalopride Succinatebrand: Motegrity | 260 | 50 |
| Omeprazole | 206 | 53 |
| Linaclotidebrand: Linzess | 145 | 39 |
| Pantoprazole Sodium | 65 | 19 |
| Promethazine Hcl | 61 | 19 |
| Esomeprazole Magnesium | 56 | 19 |
| Pyridostigmine Bromide | 55 | 16 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$338 across 5 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
- 2010-07-27
- Last updated
- 2024-04-16
- Certified
- 2024-04-16
Frequently asked questions
- What is Irene Sonu's NPI number?
- Irene Sonu's National Provider Identifier (NPI) is 1801100300, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irene Sonu's specialty?
- Irene Sonu is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Irene Sonu located?
- Irene Sonu's practice location on file with NPPES is 300 Pasteur Dr, Palo Alto, CA 94305-2200.
- What is Irene Sonu's phone number?
- The practice phone number listed in the NPPES registry for Irene Sonu is (650) 723-4000.
- Does Irene Sonu accept Medicare?
- Irene Sonu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irene Sonu's NPI active?
- Yes — Irene Sonu's NPI (1801100300) is active in the NPPES registry as of the last update on 2024-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.