Melissa Jill Cohen, M.D.
Medical Oncology Physician · Simi Valley, CA
Melissa Jill Cohen, M.D. is a medical oncology physician with a practice address in Simi Valley, California, and NPI 1174763262, issued on Mar 2, 2009. Check the license (California A104517, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Melissa Jill Cohen
- Credential
- M.D.
- Primary taxonomy
- Medical Oncology Physician 207RX0202X
- License number
- A104517 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2750 Sycamore Dr, Simi Valley, CA 93065
- Phone
- (805) 583-0110
- Enumerated
- Mar 2, 2009
- Record last updated
- Oct 6, 2011 (not updated in 15 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20230724002209); accepts Medicare assignment
- Medical or professional school
- George Washington University School Of Medicine, 2002
- 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 2750 Sycamore Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Cheadle, MDFamily Medicine Physician1548362155
- John Dingilian, MDFamily Medicine Physician1295828291
- Mark Kang, MDSurgery Physician1114914157
- Anita Kaul, M.D.Hematology & Oncology Physician1689677205
- Dominique Nguyen, R.T. (R)(M) ARRTMammography Radiologic Technologist1649967183
- Pravina Somani, M.D.Specialist1326011032
Verify Melissa Jill Cohen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A104517Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
14% fewer Medicare Part D claims than the average medical oncology physician in 2024
602 Medicare Part D claims for 164 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. 23 claims were for opioids.
Most prescribed
- Letrozole37 claims
- Tamoxifen Citrate30 claims
- Anastrozole29 claims
- Dexamethasone28 claims
- Gabapentin22 claims
- Lorazepam22 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): 100 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: $1,099.03
17 payments; by number, the most common kind was long term medical supply or device loan; the largest payer was Novartis Pharmaceuticals Corporation. 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
- Teton County Hospital DistrictJackson, WY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Melissa Jill Cohen among 447 medical oncology physician records in California
Melissa Jill Cohen, M.D. 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
- Graduated2002 · median 2004 among the 312 with a school on file
- Record last updated2011 · 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 Simi Valley → Medical Oncology Physician nationwide →
The 8 medical oncology physician records with the nearest ZIP codes
- Jay Klarnet, MDOxnard, CA 930301538258314
- Daniel Greenwald, M.D.Santa Barbara, CA 931051235240987
- Mukul Gupta, M.D.Santa Barbara, CA 931051295843738
- Juliet Penn, M.D.Santa Barbara, CA 931051215175070
- Robert Ouwendijk, M.D.Ventura, CA 930031578627725
- Evan Slater, M.D.Ventura, CA 930031992869044
- Farshid Dayyani, M.D., PH.D.Orange, CA 928681376710434
- Samuel Ejadi, MDOrange, CA 928681285605212
Common questions
What is Melissa Jill Cohen, M.D.'s NPI number?
Melissa Jill Cohen, M.D.'s National Provider Identifier (NPI) is 1174763262, issued on Mar 2, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Melissa Jill Cohen, M.D. located?
The NPPES record lists a practice address at 2750 Sycamore Dr, Simi Valley, CA, 93065. Phone: (805) 583-0110. Providers update this record themselves, so call before visiting.
How can I verify Melissa Jill Cohen, M.D.'s license?
NPPES lists California license number A104517, 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 Melissa Jill Cohen, M.D. prescribe under Medicare Part D?
In 2024, Melissa Jill Cohen, M.D. had 602 Medicare Part D claims for 164 beneficiaries; the average among medical oncology physician prescribers was 703. Part D covers Medicare prescriptions only.
What is Melissa Jill Cohen, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 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.