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CHAPARRAL MEDICAL GROUP INC.
NPI 1639869605
Internal Medicine - Cardiovascular Disease in Upland, CA

Active since May 11, 2023
914 W FOOTHILL BLVD STE A, UPLAND, CA 91786(909) 285-6717(909) 946-8700 Get Directions Write a Review

NPPES record last updated: February 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Chaparral Medical Group Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

CHAPARRAL MEDICAL GROUP INC. (NPI 1639869605) is a healthcare organization registered as a cardiovascular disease in Upland, California and active in the NPI registry since May 2023. The organization lists Prasad A Jeereddi, Ceo, as its authorized official.

NPPES Registry Identity

NPI1639869605
Entity TypeOrganization
Primary Taxonomy207RC0000X
Legal Business NameCHAPARRAL MEDICAL GROUP INC.
Location Address914 W FOOTHILL BLVD STE AUpland, CA 91786-3785
Mailing Address840 Towne Center DrPomona, CA 91767-5900 · (909) 398-1550 · Fax (909) 398-0128
Phone(909) 285-6717
Fax(909) 946-8700
Organization SubpartNo
Authorized OfficialPrasad A JeereddiCeo · (909) 469-1823
Enumeration DateMay 11, 2023
Last NPPES UpdateFebruary 24, 2026
NPPES CertifiedFebruary 24, 2026
✔ NPI 1639869605 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedSurgeryTaxonomy 208600000X
914 W FOOTHILL BLVD STE A, Upland, CA 91786
Open in Google Maps ↗

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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

130

Medicare enrollment records show 130 clinicians reassign Medicare billing to Chaparral Medical Group Inc., which bills Medicare for the services they deliver. Of these, 97 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 28

Internal Medicine31
Nurse Practitioner18
Cardiovascular Disease (Cardiology)11
Family Practice10
Pulmonary Disease7
Endocrinology6
Gastroenterology5
Dermatology4
20 other specialties38

Nearest to this location (20)

See all 130
Mysore Nagaraja, M.D.
Gastroenterology
NPI 1760451298
811 E 11TH ST STE 208
Upland, CA 91786
(909) 982-2279
✔ PECOS✔ Accepts Medicare0.2 mi
Dwaraknath Reddy, M.D.
Gastroenterology
NPI 1417964917
811 E 11TH ST SUITE 208
Upland, CA 91786
(909) 629-5540
✔ PECOS0.3 mi
Donna Dudziak, M.D.
General Surgery
NPI 1275630568
901 SAN BERNARDINO RD STE 301
Upland, CA 91786
(909) 946-6221
✔ PECOS✔ Accepts Medicare0.5 mi
Peter Niciforos, M.D.
Family Practice
NPI 1356359277
330 N D ST STE 300
San Bernardino, CA 92401
(909) 888-6602
✔ PECOS0.8 mi
Padmini Tummala, MD
Cardiovascular Disease (Cardiology)
NPI 1669519500
914 W FOOTHILL BLVD STE A
Upland, CA 91786
(909) 285-6717
✔ PECOS✔ Accepts Medicare1.5 mi
Pratibha Kayastha
Nurse Practitioner
NPI 1942601281
585 N MOUNTAIN AVE SUITE A
Upland, CA 91786
(909) 946-2228
✔ PECOS1.9 mi
1131 W 6TH ST STE 150
Ontario, CA 91762
(909) 482-4462
✔ PECOS✔ Accepts Medicare2.5 mi
Heather Davis Kingston, MD
Pulmonary Disease
NPI 1154390391
1601 MONTE VISTA AVE STE 270
Claremont, CA 91711
(909) 865-9152
✔ PECOS✔ Accepts Medicare3.6 mi
Ani Berberyan, M.D.
Family Practice
NPI 1700230224
9140 HAVEN AVE STE 112
Rancho Cucamonga, CA 91730
(909) 296-7800
✔ PECOS3.8 mi
Nancy Meng, NP-C
Nurse Practitioner
NPI 1760134852
9170 HAVEN AVE STE 120
Rancho Cucamonga, CA 91730
(909) 476-8700
✔ PECOS✔ Accepts Medicare3.8 mi
Kavoos Nazeri, M.D.
Rheumatology
NPI 1477731644
9170 HAVEN AVE STE 120
Rancho Cucamonga, CA 91730
(909) 466-0550
✔ PECOS✔ Accepts Medicare3.8 mi
Charlaine Williamson, NP
Nurse Practitioner
NPI 1932408960
9170 HAVEN AVE STE 120
Rancho Cucamonga, CA 91730
(909) 476-8700
✔ PECOS✔ Accepts Medicare3.8 mi
Johnnie Woodson, M.D.
Dermatology
NPI 1780727750
9190 HAVEN AVE STE 210
Rancho Cucamonga, CA 91730
(909) 466-7779
✔ PECOS✔ Accepts Medicare3.8 mi
Haritha Alla, M.D.
Cardiovascular Disease (Cardiology)
NPI 1487739835
8330 RED OAK ST STE 101
Rancho Cucamonga, CA 91730
(909) 987-4922
✔ PECOS✔ Accepts Medicare3.9 mi
Nyein Tint, M.D.
Internal Medicine
NPI 1336533447
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.9 mi
Khader Abounasr, MD
Pulmonary Disease
NPI 1780884015
8330 RED OAK ST SUITE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.9 mi
Harvey Cohen, MD
Internal Medicine
NPI 1972517423
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.9 mi
Aftab Qadir, MD
Internal Medicine
NPI 1851753545
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.9 mi
Glenn Miya, MD
Pediatric Medicine
NPI 1912967894
430 W BASELINE RD
Claremont, CA 91711
(909) 621-3916
✔ PECOS4.9 mi
Robyn Jacoby, DO
Family Practice
NPI 1487623575
430 W BASELINE RD
Claremont, CA 91711
(909) 621-3916
✔ PECOS✔ Accepts Medicare4.9 mi
See all 130 clinicians

Source: 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 1639869605. It was assigned to this organization in the NPPES registry on May 11, 2023.

Where is Chaparral Medical Group Inc. located?

Chaparral Medical Group Inc. is located at 914 W Foothill Blvd Ste A, Upland, CA 91786. The listed phone number is (909) 285-6717.

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), 130 clinicians in 28 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 (31), Nurse Practitioner (18) and Cardiovascular Disease (Cardiology) (11). Of these, 97 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 February 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months 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.