Ryan Ou
Surgery Physician · Redwood City, CA
Ryan Ou is a surgery physician with a practice address in Redwood City, California, and NPI 1457855074, issued on Mar 19, 2018. Check the license (California A163824, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ryan Ou
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A163824 CA
Self-reported in NPPES; status is on the state search - Practice location
- 905 Maple St Dept 470, Redwood City, CA 94063
- Phone
- (510) 213-9830
- Enumerated
- Mar 19, 2018
- Record last updated
- Aug 19, 2024
- Medicare enrollment
- Enrolled (PECOS I20230912001854); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Verify Ryan Ou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A163824Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average surgery physician in 2024
84 Medicare Part D claims for 60 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 48 claims were for opioids.
Most prescribed
- Oxycodone Hcl42 claims
- Ondansetron Hcl11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $3,534.56
32 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Permanente Medical Group IncRedwood City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ryan Ou among 3,118 surgery physician records in California
Ryan Ou is one of 3,118 surgery physician records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 89% of them.
- NPI issued2018 · 89% of these records are older, 9% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated2018 · median 2003 among the 1,901 with a school on file
- Record last updated2024 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Redwood City → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Lynn Chang, MDRedwood City, CA 940631598843187
- Harald Jasiulek, MDRedwood City, CA 940631417035064
- John Ngai, MDRedwood City, CA 940631538233846
- Jerome Stefanko, MDRedwood City, CA 940631861570459
- Derrick Taylor, MDRedwood City, CA 940631417035007
- Ryan Macht, M.D.Redwood City, CA 940621063711604
- Michael OholleranRedwood City, CA 940651003916321
- John Feng, MDSan Carlos, CA 940701275625832
Common questions
What is Ryan Ou's NPI number?
Ryan Ou's National Provider Identifier (NPI) is 1457855074, issued on Mar 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Ryan Ou located?
The NPPES record lists a practice address at 905 Maple St Dept 470, Redwood City, CA, 94063. Phone: (510) 213-9830. Providers update this record themselves, so call before visiting.
How can I verify Ryan Ou's license?
NPPES lists California license number A163824, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ryan Ou prescribe under Medicare Part D?
In 2024, Ryan Ou had 84 Medicare Part D claims for 60 beneficiaries; the average among surgery physician prescribers was 147. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.