Molly Diaz, PA-C
Medical Oncology Physician · Duarte, CA
Molly Diaz, PA-C is a medical oncology physician with a practice address in Duarte, California, and NPI 1558500397, issued on Feb 18, 2009. Check the license (California PA20108, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Molly Diaz
- Credential
- PA-C
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- PA20108 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Duarte RD, Duarte, CA 91010
- Phone
- (626) 256-4673
- Enumerated
- Feb 18, 2009
- Record last updated
- Dec 7, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110518000283); accepts Medicare assignment
- 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 1500 Duarte RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Molly Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license PA20108Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
60% fewer Medicare Part D claims than the average medical oncology physician in 2024
284 Medicare Part D claims for 49 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 17 claims were for opioids.
Most prescribed
- Imatinib Mesylate19 claims
- Anastrozole18 claims
- Ogsiveo17 claims
- Stivarga14 claims
- Diphenoxylate-Atropine13 claims
- Exemestane13 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 practice group's MIPS final score for 2023 (Medicare payment program): 99.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $626.46
19 payments; by number, the most common kind was food and beverage; the largest payer was Deciphera Pharmaceuticals Inc. The 3,343 providers of this specialty with any payment received $11,773.47 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 FoundationDuarte, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Molly Diaz among 447 medical oncology physician records in California
Molly Diaz, PA-C 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 2009, is newer than 62% of them.
- NPI issued2009 · 62% of these records are older, 35% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2008 · median 2004 among the 312 with a school on file
- Record last updated2020 · 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).
48 medical oncology physician records list a practice address in Duarte
They are 48 of the 1,287 NPPES records with a practice address in Duarte, and 447 medical oncology physician records in California.
All 447 in California → Every provider in Duarte → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Linda Bosserman, M.D., F.A.C.PDuarte, CA 910101346289824
- Cathie Chung, M.D.Duarte, CA 910101679599914
- Lee Cranmer, MD, PHDDuarte, CA 910101861465759
- Tanya Dorff, M.D.Duarte, CA 910101508879115
- Manana Elia, M.D.Duarte, CA 910101609841816
- Marwan Fakih, MDDuarte, CA 910101861498271
- Marianna Koczywas, MDDuarte, CA 910101639286677
- Dean Lim, MDDuarte, CA 910101790892735
Common questions
What is Molly Diaz, PA-C's NPI number?
Molly Diaz, PA-C's National Provider Identifier (NPI) is 1558500397, issued on Feb 18, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Molly Diaz, PA-C located?
The NPPES record lists a practice address at 1500 Duarte RD, Duarte, CA, 91010. Phone: (626) 256-4673. Providers update this record themselves, so call before visiting.
How can I verify Molly Diaz, PA-C's license?
NPPES lists California license number PA20108, 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 Molly Diaz, PA-C prescribe under Medicare Part D?
In 2024, Molly Diaz, PA-C had 284 Medicare Part D claims for 49 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Molly Diaz, PA-C's MIPS final score?
The 2023 MIPS final score is 99.1 of 100, reported for the practice group. 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.