CHAPARRAL MEDICAL GROUP INC.
NPI 1831442078
Internal Medicine - Cardiovascular Disease in Upland, CA
About Chaparral Medical Group Inc. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CHAPARRAL MEDICAL GROUP INC. (NPI 1831442078) is a healthcare organization registered as a cardiovascular disease in Upland, California and active in the NPI registry since October 2012. The organization lists Adrienne Walker, Contracts Manager, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
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)
Chaparral Medical Group Inc. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Clinicians Billing Medicare Through This Organization
99Medicare enrollment records show 99 clinicians reassign Medicare billing to Chaparral Medical Group Inc., which bills Medicare for the services they deliver. Of these, 73 practice within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 22
Nearest to this location (20)
See all 99Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Chaparral Medical Group Inc.'s NPI number?
The NPI number for Chaparral Medical Group Inc. is 1831442078. It was assigned to this organization in the NPPES registry on October 25, 2012.
Where is Chaparral Medical Group Inc. located?
Chaparral Medical Group Inc. is located at 591 N 13th Ave Suite 3, Upland, CA 91786. The listed phone number is (909) 985-5885.
What is Chaparral Medical Group Inc.'s specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Chaparral Medical Group Inc. enrolled in Medicare?
Yes. Chaparral Medical Group Inc. is registered in the Medicare PECOS enrollment system.
How many clinicians bill Medicare through Chaparral Medical Group Inc.?
According to the CMS Revalidation Reassignment List (October 2026 release), 99 clinicians in 22 Medicare specialties reassign their Medicare billing to Chaparral Medical Group Inc.. 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 (21), Nurse Practitioner (15) and Cardiovascular Disease (Cardiology) (9). Of these, 73 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Chaparral Medical Group Inc. was last updated on October 25, 2012. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.
# Chaparral Medical Group Inc. · NPI 1831442078
Cardiovascular Disease organization in Upland, California. Organization record, active in the CMS NPPES registry since October 25, 2012.
## Identity
- **NPI:** 1831442078 (Entity type: Organization)
- **Enumerated:** October 25, 2012
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **Organization subpart:** No
- **Authorized official:** Adrienne Walker, CONTRACTS MANAGER
## Practice location
- **Address:** 591 N 13TH AVE, SUITE 3, Upland, CA 91786-4967
- **Phone:** (909) 985-5885 · **Fax:** (909) 920-3379
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Clinicians billing through this organization:** 99 clinicians in 22 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Internal Medicine (21), Nurse Practitioner (15), Cardiovascular Disease (Cardiology) (9); 73 practice within 10 miles; [full list](https://npiprofile.com/npi/1831442078/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 25, 2012
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Source: [NPI Profile](https://npiprofile.com/npi/1831442078) · Data from the CMS NPPES public registry.