Jana Portnow, MD
Medical Oncology Physician · Duarte, CA
Jana Portnow, MD is a medical oncology physician with a practice address in Duarte, California, and NPI 1679680458, issued on Aug 25, 2006. Check the license (California A80221, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jana Portnow
- Credential
- MD
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A80221 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1500 Duarte RD, Duarte, CA 91010
- Phone
- (626) 471-9200
- Enumerated
- Aug 25, 2006
- Record last updated
- Nov 27, 2023
- Fax
- (626) 301-8233
- Medicaid ID
- 00A802210 CA
- Medicare enrollment
- Enrolled (PECOS I20110208000265); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 1994
- 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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- Megan Abel, PA-CPhysician Assistant1104100619
- Michelle Afkhami, M.D.Hematology (Pathology) Physician1326230228
- Vaibhav Agrawal, M.D.Hematology & Oncology Physician1538402565
Verify Jana Portnow in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A80221Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
63% fewer Medicare Part D claims than the average medical oncology physician in 2024
257 Medicare Part D claims for 42 beneficiaries, against an average of 703 among the 4,230 providers of this specialty who prescribed in Part D.
Most prescribed
- Sodium Chloride31 claims
- Dexamethasone27 claims
- Levetiracetam20 claims
- Ondansetron Hcl19 claims
- Sulfamethoxazole-Trimethoprim18 claims
- Anastrozole15 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).
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).
Jana Portnow among 447 medical oncology physician records in California
Jana Portnow, 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
- Graduated1994 · median 2004 among the 312 with a school on file
- Record last updated2023 · 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 Jana Portnow, MD's NPI number?
Jana Portnow, MD's National Provider Identifier (NPI) is 1679680458, issued on Aug 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jana Portnow, MD located?
The NPPES record lists a practice address at 1500 Duarte RD, Duarte, CA, 91010. Phone: (626) 471-9200. Providers update this record themselves, so call before visiting.
How can I verify Jana Portnow, MD's license?
NPPES lists California license number A80221, 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 Jana Portnow, MD prescribe under Medicare Part D?
In 2024, Jana Portnow, MD had 257 Medicare Part D claims for 42 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Jana Portnow, MD'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.