DR. OMAR DARWISH D.O.
NPI 1497980932
Hospitalist in Orange, CA
About Dr. Omar Darwish D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. OMAR DARWISH D.O. (NPI 1497980932) is an individual hospitalist provider in Orange, California, licensed in California (20A10612) and active in the NPI registry since May 2009. He is enrolled in Medicare PECOS, maintains a secondary practice location in Costa Mesa, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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. Omar Darwish D.o. 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.
Medicare Billing Reassignments
3Medicare enrollment records show Omar Darwish reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 525 clinicians in this Medicare group
Orange, CA 92868
- Reassigned Medicare billing, California enrollment
- 250 clinicians in this Medicare group
Torrance, CA 90505
- Reassigned Medicare billing, California enrollment
- 24 clinicians in this Medicare group
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 7
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92868 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ORANGE, CA 92868
ORANGE, CA 92868
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 Omar Darwish's NPI number?
The NPI number for Omar Darwish is 1497980932. It was assigned to this individual provider in the NPPES registry on May 28, 2009.
Where is Omar Darwish located?
Omar Darwish practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 880-7812.
What is Omar Darwish's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Omar Darwish enrolled in Medicare?
Yes. Omar Darwish 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 Omar Darwish's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Omar Darwish reassigns Medicare benefits to 3 organizations: Uc Regents (Orange, CA), The Regents Of The University Of California-Irvine (Orange, CA) and Medison Corp (Torrance, 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 Omar Darwish'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 Omar Darwish was last updated on April 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Dr. Omar Darwish, D.O. · NPI 1497980932
Hospitalist physician in Orange, California. Individual provider, active in the CMS NPPES registry since May 28, 2009.
## Identity
- **NPI:** 1497980932 (Entity type: Individual)
- **Enumerated:** May 28, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 20A10612 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 101 THE CITY DR S, Orange, CA 92868-3201
- **Phone:** (714) 880-7812
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Uc Regents (NPI 1003864174, Orange, CA); The Regents Of The University Of California-Irvine (NPI 1154479723, Orange, CA); Medison Corp (NPI 1760050587, Torrance, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** April 10, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1497980932) · Data from the CMS NPPES public registry.