DAVID ZACHARY HARRISON M.D.
NPI 1104189000
Emergency Medicine in Los Angeles, CA
About David Zachary Harrison M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAVID ZACHARY HARRISON M.D. (NPI 1104189000) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A127729) and active in the NPI registry since June 2012. He is enrolled in Medicare PECOS and is a graduate of Tufts University School Of Medicine (2012).
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
David Zachary Harrison 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.
Medicare Billing Reassignments
5Medicare enrollment records show David Harrison reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
Encinitas, CA 92024
- Reassigned Medicare billing, California enrollment
- 221 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 80 clinicians in this Medicare group
Santa Clara, CA 95051
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90089 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.
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
LOS ANGELES, CA 90089
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 David Harrison's NPI number?
The NPI number for David Harrison is 1104189000. It was assigned to this individual provider in the NPPES registry on June 17, 2012.
Where is David Harrison located?
David Harrison practices at 1200 N State St Room 1060H, Los Angeles, CA 90089. The listed phone number is (323) 409-9000.
What is David Harrison's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is David Harrison enrolled in Medicare?
Yes. David Harrison 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 David Harrison's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Harrison reassigns Medicare benefits to 5 organizations: Southern California Permanente Medical Group (Los Angeles, CA), Regents Of The University Of California (Encinitas, CA), Emergency Services Medical Corporation (San Diego, CA), Permanente Medical Group Inc (Santa Clara, CA) and University Of California Sfgh Medical Group (San Francisco, 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 David Harrison'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 David Harrison was last updated on May 7, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# David Zachary Harrison, M.D. · NPI 1104189000
Emergency Medicine physician in Los Angeles, California. Individual provider, active in the CMS NPPES registry since June 17, 2012.
## Identity
- **NPI:** 1104189000 (Entity type: Individual)
- **Enumerated:** June 17, 2012
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A127729 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1200 N STATE ST, ROOM 1060H, Los Angeles, CA 90089-1001
- **Phone:** (323) 409-9000
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Southern California Permanente Medical Group (NPI 1134151657, Los Angeles, CA); Regents Of The University Of California (NPI 1952637050, Encinitas, CA); Emergency Services Medical Corporation (NPI 1699725069, San Diego, CA); Permanente Medical Group Inc (NPI 1073606299, Santa Clara, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Tufts University School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** May 7, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1104189000) · Data from the CMS NPPES public registry.