DR. PATRICK UM MD
NPI 1225175227
Emergency Medicine in Oxnard, CA
About Dr. Patrick Um Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PATRICK UM MD (NPI 1225175227) is an individual emergency medicine provider in Oxnard, California, licensed in California (A103916) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of R Franklin University Of Med & Sci/chicago Medical School (2005).
NPPES Registry Identity
Specialties & Licenses
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. Patrick Um Md 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 Reassignment
Medicare enrollment records show Patrick Um reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Oxnard, CA 93030
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1912776329 (California)
- 1,204 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 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 93030 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
OXNARD, CA 93030
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 Patrick Um's NPI number?
The NPI number for Patrick Um is 1225175227. It was assigned to this individual provider in the NPPES registry on January 31, 2007.
Where is Patrick Um located?
Patrick Um practices at 1600 N Rose Ave, Oxnard, CA 93030. The listed phone number is (805) 988-2679.
What is Patrick Um's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Patrick Um enrolled in Medicare?
Yes. Patrick Um 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 organization bills Medicare for Patrick Um's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Patrick Um reassigns Medicare benefits to Cep America - California (Oxnard, CA). The 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 Patrick Um'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 Patrick Um was last updated on April 5, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Patrick Um, MD · NPI 1225175227
Emergency Medicine physician in Oxnard, California. Individual provider, active in the CMS NPPES registry since January 31, 2007.
## Identity
- **NPI:** 1225175227 (Entity type: Individual)
- **Enumerated:** January 31, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A103916 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1600 N ROSE AVE, Oxnard, CA 93030-3722
- **Phone:** (805) 988-2679
## 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:** Cep America - California (NPI 1326339748, Oxnard, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** R Franklin University Of Med & Sci/chicago Medical School, class of 2005
## Record status
- **NPPES last updated:** April 5, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1225175227) · Data from the CMS NPPES public registry.