ARNOLD A WEEKES MD
NPI 1023057833
Anesthesiology in Antioch, CA
About Arnold A Weekes Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ARNOLD A WEEKES MD (NPI 1023057833) is an individual anesthesiology provider in Antioch, California, licensed in California (775521) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Antioch, and is a graduate of Temple University School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 3
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
Arnold A Weekes 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 Reassignments
3Medicare enrollment records show Arnold Weekes reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 clinicians in this Medicare group
Stockton, CA 95207
- Reassigned Medicare billing, California enrollment
- 11 clinicians in this Medicare group
Stockton, CA 95207
- Reassigned Medicare billing, California enrollment
- 22 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 5
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.
Other Providers at the Same Location NPPES 5
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ANTIOCH, CA 94531
ANTIOCH, CA 94531
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 Arnold Weekes's NPI number?
The NPI number for Arnold Weekes is 1023057833. It was assigned to this individual provider in the NPPES registry on June 6, 2006.
Where is Arnold Weekes located?
Arnold Weekes practices at 4053 Lone Tree Way Ste 201, Antioch, CA 94531. The listed phone number is (925) 756-3400.
What is Arnold Weekes's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Arnold Weekes enrolled in Medicare?
Yes. Arnold Weekes 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 Arnold Weekes's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arnold Weekes reassigns Medicare benefits to 3 organizations: Sutter Bay Medical Foundation (Orinda, CA), Core Anesthesia Services PC (Stockton, CA) and Core Anesthesia Provider Services PC (Stockton, 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 Arnold Weekes'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 Arnold Weekes was last updated on July 31, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Arnold A Weekes, MD · NPI 1023057833
Anesthesiology physician in Antioch, California. Individual provider, active in the CMS NPPES registry since June 6, 2006.
## Identity
- **NPI:** 1023057833 (Entity type: Individual)
- **Enumerated:** June 6, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 775521 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 4053 LONE TREE WAY STE 201, Antioch, CA 94531-6210
- **Phone:** (925) 756-3400 · **Fax:** (925) 756-3410
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA); Core Anesthesia Services PC (NPI 1952294969, Stockton, CA); Core Anesthesia Provider Services PC (NPI 1538800388, Stockton, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Temple University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** July 31, 2019
- **Other identifiers:** Other RHC00166977 (CA); Other A88042 (CA); Medicaid 1023057833 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1023057833) · Data from the CMS NPPES public registry.