CHAPARRAL MEDICAL GROUP INC
NPI 1144282732
Internal Medicine - Rheumatology 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 1144282732) is a healthcare organization registered as a rheumatology in Upland, California and active in the NPI registry since April 2006. The organization lists Adrienne M Walker, Contracts Administrator, as its authorized official.
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 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 1144282732. It was assigned to this organization in the NPPES registry on April 6, 2006.
Where is Chaparral Medical Group Inc located?
Chaparral Medical Group Inc is located at 1330 East San Bernardino Rd Ste L, Upland, CA 91786. The listed phone number is (909) 931-0228.
What is Chaparral Medical Group Inc's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.
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 10, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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 1144282732
Rheumatology organization in Upland, California. Organization record, active in the CMS NPPES registry since April 6, 2006.
## Identity
- **NPI:** 1144282732 (Entity type: Organization)
- **Enumerated:** April 6, 2006
- **Primary specialty:** Internal Medicine - Rheumatology · taxonomy 207RR0500X
- **Organization subpart:** No
- **Authorized official:** Adrienne Walker, CONTRACTS ADMINISTRATOR
## Practice location
- **Address:** 1330 EAST SAN BERNARDINO RD, STE L, Upland, CA 91786-4980
- **Phone:** (909) 931-0228 · **Fax:** (909) 931-0145
## 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/1144282732/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 10, 2007
- **Other identifiers:** Medicaid GR0052952 (CA); Medicare PIN ZZZ24805Z (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1144282732) · Data from the CMS NPPES public registry.