Sai-Hong I Ou, MD
Hematology & Oncology Physician · Orange, CA
Sai-Hong I Ou, MD is a hematology & oncology physician with a practice address in Orange, California, and NPI 1639259872, issued on Oct 16, 2006. Check the license (California 000000A83672, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Sai-Hong I Ou
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 000000A83672 CA
Self-reported in NPPES; status is on the state search - Practice location
- Uci Medical Center, Orange, CA 92868
- Phone
- (714) 456-8978
- Enumerated
- Oct 16, 2006
- Record last updated
- Jan 14, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20050524001116); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 2001
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at Uci Medical Center
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Sai-Hong I Ou in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 000000A83672Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
19% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
711 Medicare Part D claims for 73 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 50% of claims. 21 claims were for opioids.
Most prescribed
- Tagrisso124 claims
- Dexamethasone46 claims
- Ondansetron Hcl29 claims
- Retevmo27 claims
- Gilotrif26 claims
- Sodium Chloride25 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $5,503.36
9 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- UC RegentsOrange, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Sai-Hong I Ou among 1,583 hematology & oncology physician records in California
Sai-Hong I Ou, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2001 · median 2003 among the 1,124 with a school on file
- Record last updated2008 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Orange → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Timothy Byun, MDOrange, CA 928681871545012
- Warren Chow, MDOrange, CA 928681093822017
- Paul Coluzzi, M.D.Orange, CA 928681972563906
- Mihaela Cristea, MDOrange, CA 928681417050998
- Sam Huang, M.D.Orange, CA 928681841248812
- Tiberio Lindgren, MDOrange, CA 928681275585424
- John Link, MDOrange, CA 928681245281211
- Steven Lipkin, MDOrange, CA 928681134153547
Common questions
What is Sai-Hong I Ou, MD's NPI number?
Sai-Hong I Ou, MD's National Provider Identifier (NPI) is 1639259872, issued on Oct 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Sai-Hong I Ou, MD located?
The NPPES record lists a practice address at Uci Medical Center, Orange, CA, 92868. Phone: (714) 456-8978. Providers update this record themselves, so call before visiting.
How can I verify Sai-Hong I Ou, MD's license?
NPPES lists California license number 000000A83672, 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 Sai-Hong I Ou, MD prescribe under Medicare Part D?
In 2024, Sai-Hong I Ou, MD had 711 Medicare Part D claims for 73 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Sai-Hong I Ou, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.