DR. AARON MARK SANCHEZ ACOSTA DO
NPI 1538789987
Emergency Medicine in Walnut Creek, CA
About Dr. Aaron Mark Sanchez Acosta Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AARON MARK SANCHEZ ACOSTA DO (NPI 1538789987) is an individual emergency medicine provider in Walnut Creek, California, licensed in California (20A21247) and active in the NPI registry since April 2020. He is enrolled in Medicare PECOS, maintains a secondary practice location in Detroit, and is a graduate of Michigan State University College Of Osteopathic Medicine (2020).
NPPES Registry Identity
Specialties & Licenses 2
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. Aaron Mark Sanchez Acosta Do 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 Aaron Mark Acosta reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 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 94596 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 94596
WALNUT CREEK, CA 94596
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 Aaron Mark Acosta's NPI number?
The NPI number for Aaron Mark Acosta is 1538789987. It was assigned to this individual provider in the NPPES registry on April 24, 2020.
Where is Aaron Mark Acosta located?
Aaron Mark Acosta practices at 1425 S Main St, Walnut Creek, CA 94596. The listed phone number is (925) 295-4000.
What is Aaron Mark Acosta's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Aaron Mark Acosta enrolled in Medicare?
Yes. Aaron Mark Acosta 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 Aaron Mark Acosta's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Mark Acosta reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, 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 Aaron Mark Acosta'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 Aaron Mark Acosta was last updated on August 18, 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. Aaron Mark Sanchez Acosta, DO · NPI 1538789987
Emergency Medicine physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since April 24, 2020.
## Identity
- **NPI:** 1538789987 (Entity type: Individual)
- **Enumerated:** April 24, 2020
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 20A21247 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1425 S MAIN ST, Walnut Creek, CA 94596-5318
- **Phone:** (925) 295-4000
## 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:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Michigan State University College Of Osteopathic Medicine, class of 2020
## Record status
- **NPPES last updated:** August 18, 2023
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Source: [NPI Profile](https://npiprofile.com/npi/1538789987) · Data from the CMS NPPES public registry.