OPTUM PRIMARY CARE
NPI 1689818874
Internal Medicine in Sun City West, AZ
About Optum Primary Care NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OPTUM PRIMARY CARE (NPI 1689818874) is a healthcare organization registered as an internal medicine in Sun City West, Arizona and active in the NPI registry since May 2009. The organization holds a CLIA Waiver certificate valid through December 8, 2026 and lists Emily Castillo, Regional Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Group Practice 1
Medicare Participation & PECOS CMS
Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Optum Primary Care is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
6Medicare enrollment records show 6 clinicians reassign Medicare billing to Optum Primary Care, which bills Medicare for the services they deliver. Of these, 3 practice at this address and 4 within 10 miles. They are listed nearest first.
Clinicians, nearest first (6)
Sun City West, AZ 85375
Sun City West, AZ 85375
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
CLIA Laboratory Certificates CMS CLIA
Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.
Certificate of Waiver 03D0967920
Optum Primary Care-Meeker Blvd · Sun City West, AZFrequently 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 Christopher Stalberg, MD, PLLC's NPI number?
The NPI number for Christopher Stalberg, MD, PLLC is 1689818874. It was assigned to this organization in the NPPES registry on May 1, 2009. The provider is doing business as Optum Primary Care.
Where is Christopher Stalberg, MD, PLLC located?
Christopher Stalberg, MD, PLLC is located at 14418 W Meeker Blvd #210, Sun City West, AZ 85375. The listed phone number is (623) 544-8400.
What is Christopher Stalberg, MD, PLLC's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Christopher Stalberg, MD, PLLC enrolled in Medicare?
Yes. Christopher Stalberg, MD, PLLC is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Christopher Stalberg, MD, PLLC?
According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 3 Medicare specialties reassign their Medicare billing to Christopher Stalberg, MD, PLLC. A 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 the clinician's services. The largest specialties are Internal Medicine (3), Nurse Practitioner (2) and Family Practice (1). Of these, 3 practice at this address and 4 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Does Christopher Stalberg, MD, PLLC hold a CLIA laboratory certificate?
Yes. A Certificate of Waiver (number 03D0967920) is associated with this NPI, valid through December 8, 2026. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.
When was this NPI record last updated?
The NPPES record for Christopher Stalberg, MD, PLLC was last updated on September 2, 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.
# Optum Primary Care · NPI 1689818874
Internal Medicine organization in Sun City West, Arizona. Organization record, active in the CMS NPPES registry since May 1, 2009.
## Identity
- **NPI:** 1689818874 (Entity type: Organization)
- **Enumerated:** May 1, 2009
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **Legal business name:** Christopher Stalberg, Md, Pllc
- **Organization subpart:** No
- **Authorized official:** Emily Castillo, REGIONAL MANAGER
## Practice location
- **Address:** 14418 W MEEKER BLVD, #210, Sun City West, AZ 85375-5291
- **Phone:** (623) 544-8400 · **Fax:** (623) 544-8989
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 6 clinicians in 3 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (3), Nurse Practitioner (2), Family Practice (1); 3 practice at this address and 4 within 10 miles · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 2, 2023
- **CLIA laboratory certificates:** 1 on file
---
Source: [NPI Profile](https://npiprofile.com/npi/1689818874) · Data from the CMS NPPES public registry.