DR. MICHAEL A ESPARZA MD
NPI 1295149540
Surgery - Trauma Surgery in Walnut Creek, CA
About Dr. Michael A Esparza Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL A ESPARZA MD (NPI 1295149540) is an individual trauma surgery provider in Walnut Creek, California, licensed in California (A138859) and active in the NPI registry since June 2014. He is enrolled in Medicare PECOS, is affiliated with Bitterroot Health - Daly Hospital, and is a graduate of Other (2014).
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 (PECOS)
Dr. Michael A Esparza Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Michael Esparza reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94598
- Reassigned Medicare billing, California enrollment
- 810 clinicians in this Medicare group
Los Angeles, CA 90027
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
- 1,281 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 8
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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Bitterroot Health - Daly Hospital
Critical Access Hospitals · Hamilton, MTMedicare 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.
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
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 Michael Esparza's NPI number?
The NPI number for Michael Esparza is 1295149540. It was assigned to this individual provider in the NPPES registry on June 15, 2014.
Where is Michael Esparza located?
Michael Esparza practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. The listed phone number is (925) 937-0404.
What is Michael Esparza's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Trauma Surgery, with taxonomy code 2086S0127X.
Is Michael Esparza enrolled in Medicare?
Yes. Michael Esparza is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Michael Esparza's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Esparza reassigns Medicare benefits to 2 organizations: John Muir Trauma Physicians Billing Service (Walnut Creek, CA) and Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, 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 Michael Esparza's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Michael Esparza affiliated with any hospitals?
According to CMS data, Michael Esparza is affiliated with Bitterroot Health - Daly Hospital.
When was this NPI record last updated?
The NPPES record for Michael Esparza was last updated on September 5, 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.
# Dr. Michael A Esparza, MD · NPI 1295149540
Trauma Surgery physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since June 15, 2014.
## Identity
- **NPI:** 1295149540 (Entity type: Individual)
- **Enumerated:** June 15, 2014
- **Primary specialty:** Surgery - Trauma Surgery · taxonomy 2086S0127X
- **State license:** A138859 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598-3122
- **Phone:** (925) 937-0404
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): John Muir Trauma Physicians Billing Service (NPI 1093864837, Walnut Creek, CA); Children's Hospital Los Angeles Medical Group, Inc. (NPI 1265530653, Los Angeles, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2014
## Record status
- **NPPES last updated:** September 5, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1295149540) · Data from the CMS NPPES public registry.