Karen Chee, M.D.
Hematology & Oncology Physician · San Mateo, CA
Karen Chee, M.D. is a hematology & oncology physician with a practice address in San Mateo, California, and NPI 1487637310, issued on Nov 23, 2005. Check the license (California A81314, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Chee
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A81314 CA
Self-reported in NPPES; status is on the state search - Practice location
- 218 DE Anza Blvd, San Mateo, CA 94402
- Phone
- (650) 341-9131
- Enumerated
- Nov 23, 2005
- Record last updated
- Jun 2, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (650) 341-9135
- Medicare enrollment
- Enrolled (PECOS I20040615001910); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 218 DE Anza Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kent Adler, M.D.Hematology & Oncology Physician1013074632
- Jennifer Brown, M.D.Hematology & Oncology Physician1740347350
- Ryan ChangMedical Oncology Physician1164985263
- Shu Yi Chen, RPHPharmacist1902401250
- Bradley Ekstrand, M.D., PH.D.Hematology & Oncology Physician1528125135
- Jelena Kao, MDHematology & Oncology Physician1932242062
Verify Karen Chee in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A81314Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
806 Medicare Part D claims for 144 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Eliquis69 claims
- Acyclovir64 claims
- Brukinsa58 claims
- Ondansetron Hcl56 claims
- Prochlorperazine Maleate45 claims
- Sulfamethoxazole-Trimethoprim45 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $478.29
5 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie 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 2 group practices
- Ucsf Medical Group Business ServicesBurlingame, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Chee among 1,583 hematology & oncology physician records in California
Karen Chee, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% 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 updated2011 · 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 San Mateo → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Kent Adler, M.D.San Mateo, CA 944021013074632
- Jennifer Brown, M.D.San Mateo, CA 944021740347350
- Robert Cohen, MDSan Mateo, CA 944021073034765
- Bradley Ekstrand, M.D., PH.D.San Mateo, CA 944021528125135
- Jelena Kao, MDSan Mateo, CA 944021932242062
- Sirisha Tummala, MDSan Mateo, CA 944021851755151
- Elham Vosoughi, M.D.San Mateo, CA 944021134658669
- Katrina FischerSan Mateo, CA 944011477972388
Common questions
What is Karen Chee, M.D.'s NPI number?
Karen Chee, M.D.'s National Provider Identifier (NPI) is 1487637310, issued on Nov 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karen Chee, M.D. located?
The NPPES record lists a practice address at 218 DE Anza Blvd, San Mateo, CA, 94402. Phone: (650) 341-9131. Providers update this record themselves, so call before visiting.
How can I verify Karen Chee, M.D.'s license?
NPPES lists California license number A81314, 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 Karen Chee, M.D. prescribe under Medicare Part D?
In 2024, Karen Chee, M.D. had 806 Medicare Part D claims for 144 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Karen Chee, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.