Monica El-Masry, M.D.
Hematology & Oncology Physician · Simi Valley, CA
Monica El-Masry, M.D. is a hematology & oncology physician with a practice address in Simi Valley, California, and NPI 1578797171, issued on May 11, 2009. Check the license (California A114528, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Monica El-Masry
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- A114528 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1157 Swallow LN, Simi Valley, CA 93065
- Phone
- (805) 527-2770
- Enumerated
- May 11, 2009
- Record last updated
- Oct 30, 2025
- Fax
- (805) 527-2870
- Medicare enrollment
- Enrolled (PECOS I20120530000692); accepts Medicare assignment
- Medical or professional school
- University Of California, Geffen School Of Medicine, 2009
- 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 1157 Swallow LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gore Badikyan, PHARMDOncology Pharmacist1639972946
- Sarah McIndoe, NPFamily Nurse Practitioner1902340920
Verify Monica El-Masry in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A114528Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
120 Medicare Part D claims for 26 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D.
Most prescribed
- Letrozole18 claims
- Acyclovir11 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.
Bills Medicare through 2 group practices
- City OF Hope Medical FoundationSimi Valley, CA
- Usc Care Medical Group IncLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Monica El-Masry among 1,583 hematology & oncology physician records in California
Monica El-Masry, 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 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2003 among the 1,124 with a school on file
- Record last updated2025 · 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 Simi Valley → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Sara Capatanos, M.D.Simi Valley, CA 930651558524322
- Anita Kaul, M.D.Simi Valley, CA 930651689677205
- Kevin Chang, MDOxnard, CA 930301649219452
- Chirag Dalsania, M.D.Oxnard, CA 930301215026380
- Rosemary McIntyre, MDOxnard, CA 930301619916772
- Fariborz Mortazavi, M.D.Oxnard, CA 930301689782708
- Kooros Parsa, MDOxnard, CA 930301629017801
- Sadanand Patil, M.D.Oxnard, CA 930301497713267
Common questions
What is Monica El-Masry, M.D.'s NPI number?
Monica El-Masry, M.D.'s National Provider Identifier (NPI) is 1578797171, issued on May 11, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Monica El-Masry, M.D. located?
The NPPES record lists a practice address at 1157 Swallow LN, Simi Valley, CA, 93065. Phone: (805) 527-2770. Providers update this record themselves, so call before visiting.
How can I verify Monica El-Masry, M.D.'s license?
NPPES lists California license number A114528, 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 Monica El-Masry, M.D. prescribe under Medicare Part D?
In 2024, Monica El-Masry, M.D. had 120 Medicare Part D claims for 26 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.