CHAPARRAL MEDICAL GROUP INC.
Medicare Clinicians for NPI 1780146019
Internal Medicine - Gastroenterology in Upland, CA
Clinicians Billing Medicare Through This Organization CMS
Clinicians who reassign their Medicare billing to this organization, per CMS enrollment records.
Chaparral Medical Group Inc. in Upland, CA bills Medicare for 99 clinicians across 22 Medicare specialties. The largest specialties are Internal Medicine with 21, Nurse Practitioner with 15 and Cardiovascular Disease (Cardiology) with 9. Search by name or filter by specialty; each name links to that clinician's NPI profile.
Internal Medicine (21)
Nurse Practitioner (15)
Cardiovascular Disease (Cardiology) (9)
Pulmonary Disease (7)
Family Practice (6)
Dermatology (4)
Endocrinology (4)
Pomona, CA 91767
General Surgery (4)
Neurosurgery (4)
Gastroenterology (3)
Interventional Cardiology (3)
Nephrology (3)
Orthopedic Surgery (3)
Rheumatology (3)
Cardiac Surgery (2)
Thoracic Surgery (2)
Allergy/Immunology (1)
Cardiac Electrophysiology (1)
Geriatric Medicine (1)
Otolaryngology (1)
Pediatric Medicine (1)
Physical Medicine and Rehabilitation (1)
About this data
Medicare reassignment. A clinician who works for a hospital, clinic or medical group usually signs a Medicare reassignment (form CMS-855R). It lets the organization bill Medicare for the clinician's services and receive the payment. This page lists the clinicians whose reassignment to Chaparral Medical Group Inc. appears in the CMS Revalidation Reassignment List.
Who is included. Clinicians who bill Medicare under their own NPI through this organization. A clinician can reassign to more than one organization, so the same name may also appear under other groups.
Addresses and phone numbers come from each clinician's own NPPES record, so they may point to another office or to the clinician's own practice.
Source: CMS Revalidation Reassignment List, October 2026 release; addresses, phone numbers and Medicare status from NPPES and PECOS. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
