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DR. MONICA EL-MASRY M.D.
NPI 1578797171
Internal Medicine - Hematology & Oncology in Simi Valley, CA

Active since May 11, 2009PECOS EnrolledAccepts Medicare Assignment
1157 SWALLOW LN, SIMI VALLEY, CA 93065(805) 527-2770(805) 527-2870 Get Directions Write a Review

NPPES record last updated: October 30, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 13, 2023, Aug 9, 2018, Dec 6, 2015 (3 updates tracked since 2015).

About Dr. Monica El-masry M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MONICA EL-MASRY M.D. (NPI 1578797171) is an individual hematology & oncology provider in Simi Valley, California, licensed in California (A114528) and active in the NPI registry since May 2009. She is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (2009).

NPPES Registry Identity

NPI1578797171
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameDR. MONICA EL-MASRYCredential: M.D.
Location Address1157 SWALLOW LNSimi Valley, CA 93065-3155
Mailing AddressPo Box 512185Los Angeles, CA 90051-0185
Phone(805) 527-2770
Fax(805) 527-2870
Sole ProprietorYes
Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 2009
Enumeration DateMay 11, 2009
Last NPPES UpdateOctober 30, 20253 updates tracked since enumeration
NPPES CertifiedOctober 30, 2025
✔ NPI 1578797171 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · A114528
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License A114528 (CA)
1157 SWALLOW LN, Simi Valley, CA 93065
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Monica El-masry M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID7911160916
PECOS Enrollment IDI20120530000692
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

2

Medicare enrollment records show Monica El-masry reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Usc Care Medical Group, Inc
37 mi
General Practice
1520 SAN PABLO ST
Los Angeles, CA 90033
  • Reassigned Medicare billing, California enrollment
  • 2,445 clinicians in this Medicare group
NPI 1902846306 (323) 442-5955
City Of Hope Medical Foundation
48 mi
Hematology & Oncology
1500 DUARTE RD
Duarte, CA 91010
  • Reassigned Medicare billing, California enrollment
  • 1,335 clinicians in this Medicare group
NPI 1871886366 (626) 256-4673

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
187 services45 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
51 services27 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
32 services16 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
21 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93065 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$185.36 typical visit price
range $62.32 – $185.36
Typical copayment $46.34 (range $15.58 – $46.34)
Most-billed visit code 99205
Established Patient
$108.74 typical visit price
range $20.68 – $151.85
Typical copayment $27.18 (range $5.17 – $37.96)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

GORE BADIKYAN PHARMD
Pharmacist (Oncology)
1157 SWALLOW LN
SIMI VALLEY, CA 93065
Ventura County (805) 527-2770
SARAH MCINDOE NP
Nurse Practitioner (Family)
1157 SWALLOW LN
SIMI VALLEY, CA 93065
Ventura County (805) 527-2770

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Monica El-masry's NPI number?

The NPI number for Monica El-masry is 1578797171. It was assigned to this individual provider in the NPPES registry on May 11, 2009.

Where is Monica El-masry located?

Monica El-masry practices at 1157 Swallow Ln, Simi Valley, CA 93065. The listed phone number is (805) 527-2770.

What is Monica El-masry's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Monica El-masry enrolled in Medicare?

Yes. Monica El-masry is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Monica El-masry's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Monica El-masry reassigns Medicare benefits to 2 organizations: Usc Care Medical Group, Inc (Los Angeles, CA) and City Of Hope Medical Foundation (Duarte, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Monica El-masry's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Monica El-masry was last updated on October 30, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.