Hanhsing Irene Wu, MD
Hematology & Oncology Physician · Mountain View, CA
Hanhsing Irene Wu, MD is a hematology & oncology physician with a practice address in Mountain View, California, and NPI 1114034832, issued on Aug 25, 2006. Check the license (California A63128, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Hanhsing Irene Wu
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A63128 CA
Self-reported in NPPES; status is on the state search - Practice location
- 701 E EL Camino Real, Mountain View, CA 94040
- Phone
- (408) 739-6000
- Enumerated
- Aug 25, 2006
- Record last updated
- Feb 27, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080725000689); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 701 E EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aya Abou-Nasr, MDAnesthesiology Physician1982191672
- Jaimie Abraham, AGPCNP-BCFamily Nurse Practitioner1245757699
- Brooke Abrantes, PA-CSurgical Physician Assistant1316771298
- Faud Abuabara, M.D.MOHS-Micrographic Surgery Physician1164472890
- Felix Adler, M.D.Diagnostic Radiology Physician1801069729
- Olga Afanasiev, MD, PHDDermatology Physician1669869384
Verify Hanhsing Irene Wu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A63128Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
16% more Medicare Part D claims than the average hematology & oncology physician in 2024
1,015 Medicare Part D claims for 215 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 26 claims were for opioids.
Most prescribed
- Anastrozole213 claims
- Alendronate Sodium115 claims
- Letrozole73 claims
- Tamoxifen Citrate72 claims
- Prednisone47 claims
- Prochlorperazine Maleate31 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: $31.41
1 payment: food and beverage; the largest payer was Eisai 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
- Sutter Bay Medical FoundationSan Carlos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Hanhsing Irene Wu among 1,583 hematology & oncology physician records in California
Hanhsing Irene Wu, 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
- Graduated1996 · median 2003 among the 1,124 with a school on file
- Record last updated2017 · 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 Mountain View → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Arun Kumar Arumugam Raajasekar, MDMountain View, CA 940401801143722
- James Heckmann, MDMountain View, CA 940401487660023
- Jiali Li, M.D., PH.DMountain View, CA 940401396981445
- Derrick Wong, M.D.Mountain View, CA 940401194941104
- Juliet Kral, MDMenlo Park, CA 940251225046188
- Gail Brown, M.D.Woodside, CA 940621750402996
- Sandra Canales, MDRedwood City, CA 940631831277474
- Linda Hoang, M.D.Redwood City, CA 940631811253214
Common questions
What is Hanhsing Irene Wu, MD's NPI number?
Hanhsing Irene Wu, MD's National Provider Identifier (NPI) is 1114034832, issued on Aug 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Hanhsing Irene Wu, MD located?
The NPPES record lists a practice address at 701 E EL Camino Real, Mountain View, CA, 94040. Phone: (408) 739-6000. Providers update this record themselves, so call before visiting.
How can I verify Hanhsing Irene Wu, MD's license?
NPPES lists California license number A63128, 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 Hanhsing Irene Wu, MD prescribe under Medicare Part D?
In 2024, Hanhsing Irene Wu, MD had 1,015 Medicare Part D claims for 215 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.