DR. LAWRENCE ONG M.D., M.ENG.
NPI 1316254840
Anesthesiology in Santa Ana, CA
About Dr. Lawrence Ong M.d., M.eng. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. LAWRENCE ONG M.D., M.ENG. (NPI 1316254840) is an individual anesthesiology provider in Santa Ana, California, licensed in California (A115027) and active in the NPI registry since September 2010. He is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2009).
NPPES Registry Identity
Specialties & Licenses 2
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. Lawrence Ong M.d., M.eng. 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
6Medicare enrollment records show Lawrence Ong reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Laguna Hills, CA 92653
- Reassigned Medicare billing, California enrollment
- 833 clinicians in this Medicare group
Long Beach, CA 90806
- Reassigned Medicare billing, California enrollment
- 107 clinicians in this Medicare group
Visalia, CA 93291
- Reassigned Medicare billing, California enrollment
- 131 clinicians in this Medicare group
Fresno, CA 93720
- Reassigned Medicare billing, California enrollment
- 293 clinicians in this Medicare group
Santa Cruz, CA 95065
- Reassigned Medicare billing, California enrollment
- 45 clinicians in this Medicare group
Sacramento, CA 95817
- Reassigned Medicare billing, California enrollment
- 2,570 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 2
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.
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 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SANTA ANA, CA 92705
SANTA ANA, CA 92705
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 Lawrence Ong's NPI number?
The NPI number for Lawrence Ong is 1316254840. It was assigned to this individual provider in the NPPES registry on September 3, 2010.
Where is Lawrence Ong located?
Lawrence Ong practices at 400 N Tustin Ave Suite 400, Santa Ana, CA 92705. The listed phone number is (800) 888-2186.
What is Lawrence Ong's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Lawrence Ong enrolled in Medicare?
Yes. Lawrence Ong 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 Lawrence Ong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Lawrence Ong reassigns Medicare benefits to 6 organizations: Cep America - Anesthesia PC (Laguna Hills, CA), California Anesthesia Associates Medical Group, Inc. (Long Beach, CA), Oak Creek Anesthesia Services, Inc. (Visalia, CA), Valley Regional Anesthesia Associates Inc (Fresno, CA), Anesthesia Medical Group Of Santa Cruz, Inc. (Santa Cruz, CA) and 1 more organization, listed in the Medicare section above. 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 Lawrence Ong'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 Lawrence Ong was last updated on August 13, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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. Lawrence Ong, M.D., M.ENG. · NPI 1316254840
Anesthesiology physician in Santa Ana, California. Individual provider, active in the CMS NPPES registry since September 3, 2010.
## Identity
- **NPI:** 1316254840 (Entity type: Individual)
- **Enumerated:** September 3, 2010
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** A115027 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 400 N TUSTIN AVE, SUITE 400, Santa Ana, CA 92705-3813
- **Phone:** (800) 888-2186 · **Fax:** (714) 426-8007
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): Cep America - Anesthesia PC (NPI 1861373631, Laguna Hills, CA); California Anesthesia Associates Medical Group, Inc. (NPI 1457399933, Long Beach, CA); Oak Creek Anesthesia Services, Inc. (NPI 1619589512, Visalia, CA); Valley Regional Anesthesia Associates Inc (NPI 1578272415, Fresno, CA); Anesthesia Medical Group Of Santa Cruz, Inc. (NPI 1871541144, Santa Cruz, CA); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Davis School Of Medicine, class of 2009
## Record status
- **NPPES last updated:** August 13, 2014
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Source: [NPI Profile](https://npiprofile.com/npi/1316254840) · Data from the CMS NPPES public registry.