Lydia Dz-Yun Chow, M.D.
Hematology & Oncology Physician · West Covina, CA
Lydia Dz-Yun Chow, M.D. is a hematology & oncology physician with a practice address in West Covina, California, and NPI 1770087314, issued on Mar 20, 2018. Check the license (California A165133, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Lydia Dz-Yun Chow
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A165133 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1250 S Sunset Ave, West Covina, CA 91790
- Phone
- (626) 856-5858
- Enumerated
- Mar 20, 2018
- Record last updated
- Jun 19, 2024
- Fax
- (626) 856-5853
- Medicare enrollment
- Enrolled (PECOS I20240703004139); accepts Medicare assignment
- Medical or professional school
- Tulane University School Of Medicine, 2018
- 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 1250 S Sunset Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria Susan Buhay-Maglunog, M.D.Rheumatology Physician1699744524
- Arlene CalderonMassage Therapist1578266334
- Sharon Choi, M.D.Specialist1740340009
- Karyn Francis, N.P.Family Nurse Practitioner1811925050
- Buford Harmon, P.T.Physical Therapist1275505653
- Alexander Maglunog, M.D.Surgery Physician1508835430
Verify Lydia Dz-Yun Chow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A165133Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
177 Medicare Part D claims for 51 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims. 20 claims were for opioids.
Most prescribed
- Imatinib Mesylate12 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: $1,376.16
39 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 one group practice
- City OF Hope Medical FoundationWest Covina, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Lydia Dz-Yun Chow among 1,583 hematology & oncology physician records in California
Lydia Dz-Yun Chow, 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 2018, is newer than 92% of them.
- NPI issued2018 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2018 · median 2003 among the 1,124 with a school on file
- Record last updated2024 · 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 West Covina → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Subhash Dhand, M.D.West Covina, CA 917901497930903
- Michelle El-Hajjaoui, DOWest Covina, CA 917901184010662
- Phyllis Klein, M.D.West Covina, CA 917901932166519
- Brian Leberthon, M.D.West Covina, CA 917901326023979
- Cary Presant, M.D.West Covina, CA 917901538109517
- Camille Adeimy, MDUpland, CA 917861477785160
- Mark Chang, DOUpland, CA 917861861954182
- Natasha GargUpland, CA 917861831458835
Common questions
What is Lydia Dz-Yun Chow, M.D.'s NPI number?
Lydia Dz-Yun Chow, M.D.'s National Provider Identifier (NPI) is 1770087314, issued on Mar 20, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Lydia Dz-Yun Chow, M.D. located?
The NPPES record lists a practice address at 1250 S Sunset Ave, West Covina, CA, 91790. Phone: (626) 856-5858. Providers update this record themselves, so call before visiting.
How can I verify Lydia Dz-Yun Chow, M.D.'s license?
NPPES lists California license number A165133, 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 Lydia Dz-Yun Chow, M.D. prescribe under Medicare Part D?
In 2024, Lydia Dz-Yun Chow, M.D. had 177 Medicare Part D claims for 51 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.