Martha Chung-Sang Man, MD
Medical Oncology Physician · San Jose, CA
Martha Chung-Sang Man, MD is a medical oncology physician with a practice address in San Jose, California, and NPI 1518976042, issued on Aug 5, 2006. Check the license (California A82063, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Martha Chung-Sang Man
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A82063 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2589 Samaritan Dr, San Jose, CA 95124
- Phone
- (408) 426-4900
- Enumerated
- Aug 5, 2006
- Record last updated
- Apr 12, 2024
- Fax
- (669) 233-2482
- Medicaid ID
- 00A820630 CA
- Medicare enrollment
- Enrolled (PECOS I20061214000487); accepts Medicare assignment
- Medical or professional school
- Stanford University School Of Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical oncology physician records → All 447 in California → Look up another NPI →
Also registered at 2589 Samaritan Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Rajeshwari Ayyar, MDMedical Oncology Physician1871670703
- Teja Bedi, MDMedical Oncology Physician1871777573
- Elwyn Cabebe, MDMedical Oncology Physician1821067281
- Peter Galatin, M.D., PH.D.Medical Oncology Physician1942311386
- Gwendolyn Ho, MDHematology (Internal Medicine) Physician1487970547
- Priya Kumaravelu, MDMedical Oncology Physician1154514677
Verify Martha Chung-Sang Man in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A82063Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average medical oncology physician in 2024
292 Medicare Part D claims for 90 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims.
Most prescribed
- Anastrozole62 claims
- Tamoxifen Citrate14 claims
- Calquence13 claims
- Hydroxyurea13 claims
- Exemestane11 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.
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Martha Chung-Sang Man among 447 medical oncology physician records in California
Martha Chung-Sang Man, MD is one of 447 medical oncology physician records with a practice address in California. 82% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2000 · median 2004 among the 312 with a school on file
- Record last updated2024 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RX0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Medical Oncology Physician providers in California
There are 447 medical oncology physician records in California.
All 447 in California → Every provider in San Jose → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Rajeshwari Ayyar, MDSan Jose, CA 951241871670703
- Teja Bedi, MDSan Jose, CA 951241871777573
- Hinda Boutrid, MDSan Jose, CA 951241457796070
- Elwyn Cabebe, MDSan Jose, CA 951241821067281
- Thomas Chen, MDSan Jose, CA 951241891870317
- Peter Galatin, M.D., PH.D.San Jose, CA 951241942311386
- Priya Kumaravelu, MDSan Jose, CA 951241154514677
- George Labban, M.D.San Jose, CA 951241114925542
Common questions
What is Martha Chung-Sang Man, MD's NPI number?
Martha Chung-Sang Man, MD's National Provider Identifier (NPI) is 1518976042, issued on Aug 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Martha Chung-Sang Man, MD located?
The NPPES record lists a practice address at 2589 Samaritan Dr, San Jose, CA, 95124. Phone: (408) 426-4900. Providers update this record themselves, so call before visiting.
How can I verify Martha Chung-Sang Man, MD's license?
NPPES lists California license number A82063, 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 Martha Chung-Sang Man, MD prescribe under Medicare Part D?
In 2024, Martha Chung-Sang Man, MD had 292 Medicare Part D claims for 90 beneficiaries; the average among medical oncology physician prescribers was 703. 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.