I-Chun Ou, MD
NPI 1093867897 · Internal Medicine Physician · Redwood City, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
I-Chun Ou, MD is a Internal Medicine Physician provider in Redwood City, CA (NPI 1093867897).
Provider details
- NPI number
- 1093867897
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A55190 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 814 | 265 |
| Amlodipine Besylate | 381 | 132 |
| Levothyroxine Sodium | 372 | 113 |
| Losartan Potassium | 301 | 103 |
| Losartan/Hydrochlorothiazidebrand: Losartan-Hydrochlorothiazide | 239 | 83 |
| Lisinopril | 233 | 73 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-18
- Last updated
- 2022-01-10
Frequently asked questions
- What is I-Chun Ou's NPI number?
- I-Chun Ou's National Provider Identifier (NPI) is 1093867897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is I-Chun Ou's specialty?
- I-Chun Ou is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is I-Chun Ou located?
- I-Chun Ou's practice location on file with NPPES is 1150 Veterans Blvd, Redwood City, CA 94063-2037.
- What is I-Chun Ou's phone number?
- The practice phone number listed in the NPPES registry for I-Chun Ou is (650) 358-7028.
- Does I-Chun Ou accept Medicare?
- I-Chun Ou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is I-Chun Ou's NPI active?
- Yes — I-Chun Ou's NPI (1093867897) is active in the NPPES registry as of the last update on 2022-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.