CHAPARRAL MEDICAL GROUP, INC.
NPI 1902111024
Internal Medicine in Pomona, CA

Q: What is Chaparral Medical Group, Inc.'s NPI number?

The NPI number for Chaparral Medical Group, Inc. is 1902111024. It was assigned to this organization in the NPPES registry on August 12, 2010.

Q: What is Chaparral Medical Group, Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since August 12, 2010

1818 N ORANGE GROVE AVE, SUITE 204, POMONA, CA 91767(909) 620-7200(909) 620-5800 Get Directions Write a Review

NPPES record last updated: April 22, 2013. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Chaparral Medical Group, Inc. NPPES

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

CHAPARRAL MEDICAL GROUP, INC. (NPI 1902111024) is a healthcare organization registered as an internal medicine in Pomona, California and active in the NPI registry since August 2010. The organization lists Adrienne Walker, Contracts Manager, as its authorized official.

NPPES Registry Identity

NPI1902111024

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameCHAPARRAL MEDICAL GROUP, INC.

Location Address1818 N ORANGE GROVE AVE, SUITE 204Pomona, CA 91767-3028

Mailing Address840 Towne Center DrPomona, CA 91767-5900 · (909) 398-1500 · Fax (909) 398-1573

Phone(909) 620-7200

Fax(909) 620-5800

Organization SubpartNo

Authorized OfficialAdrienne WalkerContracts Manager · (909) 398-1550

Enumeration DateAugust 12, 2010

Last NPPES UpdateApril 22, 2013

✔ NPI 1902111024 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedInternal Medicine · RheumatologyTaxonomy 207RR0500X

1818 N ORANGE GROVE AVE, Pomona, CA 91767

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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

114

Medicare enrollment records show 114 clinicians reassign Medicare billing to Chaparral Medical Group, Inc., which bills Medicare for the services they deliver. Of these, 2 practice at this address and 80 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 28

Internal Medicine29

Cardiovascular Disease (Cardiology)11

Nurse Practitioner9

Family Practice7

Pulmonary Disease7

Endocrinology5

Gastroenterology5

Dermatology4

20 other specialties37

Nearest to this location (20)

See all 114

Gary Sandhu, M.D.

Internal Medicine

NPI 1871513002

1818 N. ORANGE GROVE AVE
Pomona, CA 91767

(909) 630-7158

✔ PECOS✔ Accepts MedicareSame address

Omied Samiee, M.D.

Hospitalist

NPI 1952576381

1818 N ORANGE GROVE AVE SUITE 204
Pomona, CA 91767

(909) 620-7200

✔ PECOSSame address

Sudhakar Kona, MD

Internal Medicine

NPI 1619080215

1866 N ORANGE GROVE AVE SUITE 102
Pomona, CA 91767

(909) 629-3062

✔ PECOSSame address

Puneet Ghayal, M.D.

Cardiovascular Disease (Cardiology)

NPI 1336443100

1866 N ORANGE GROVE AVE SUITE # 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Manjusha Gupta, MD

Internal Medicine

NPI 1609077197

1866 N ORANGE GROVE AVE SUITE # 102
Pomona, CA 91767

(909) 865-0676

✔ PECOSSame address

Gaurav Parikh, MD

Cardiovascular Disease (Cardiology)

NPI 1144494550

1866 N ORANGE GROVE AVE SUITE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Krishna Anurag Pulumati, MD

Cardiovascular Disease (Cardiology)

NPI 1982044244

1866 N ORANGE GROVE AVE STE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Rohan Bassi, FNP

Nurse Practitioner

NPI 1023655560

1866 N ORANGE GROVE AVE STE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Rishu Marwaha, MD

Internal Medicine

NPI 1457490294

1866 N ORANGE GROVE AVE STE 102B
Pomona, CA 91767

(909) 620-4373

✔ PECOS✔ Accepts MedicareSame address

Ramanna Merla, MD

Cardiovascular Disease (Cardiology)

NPI 1336343912

1866 N ORANGE GROVE AVE STE 201
Pomona, CA 91767

(909) 623-5866

✔ PECOS✔ Accepts MedicareSame address

Muthusamy Muthiah, MD

Cardiovascular Disease (Cardiology)

NPI 1679541148

1866 N ORANGE GROVE AVE SUITE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Bhavi Pandya, M.D.

Internal Medicine

NPI 1467892059

1866 N ORANGE GROVE AVE STE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Lisa Raptis, M.D.

Hospice/Palliative Care

NPI 1902073802

1866 N ORANGE GROVE AVE STE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Jayapal Reddy

Cardiovascular Disease (Cardiology)

NPI 1073573903

1866 N ORANGE GROVE AVE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Sundararajan Srikanth, M.D.

Interventional Cardiology

NPI 1104934082

1866 N. ORANGE GROVE AVE SUITE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Ramakrishna Thumati, MD

Cardiovascular Disease (Cardiology)

NPI 1841268240

1866 N ORANGE GROVE AVE SUITE 202
Pomona, CA 91767

(909) 623-8796

✔ PECOSSame address

Nitanth Vangala, M.D.

Cardiovascular Disease (Cardiology)

NPI 1861690141

1866 N ORANGE GROVE AVE SUITE # 202
Pomona, CA 91767

(909) 623-8796

✔ PECOS✔ Accepts MedicareSame address

Uzma Waraich, M.D.

Internal Medicine

NPI 1528221843

1866 N ORANGE GROVE AVE STE 102B
Pomona, CA 91767

(909) 620-4373

✔ PECOS✔ Accepts MedicareSame address

Praveena Jeereddi, MD

Geriatric Medicine

NPI 1346218740

1880 N ORANGE GROVE AVE
Pomona, CA 91767

(909) 620-7200

✔ PECOS✔ Accepts Medicare0.1 mi

Ewa Konca, MD

Endocrinology

NPI 1134197528

1880 N ORANGE GROVE AVE
Pomona, CA 91767

(909) 620-7200

✔ PECOS✔ Accepts Medicare0.1 mi

See all 114 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 1902111024. It was assigned to this organization in the NPPES registry on August 12, 2010.

Where is Chaparral Medical Group, Inc. located?

Chaparral Medical Group, Inc. is located at 1818 N Orange Grove Ave Suite 204, Pomona, CA 91767. The listed phone number is (909) 620-7200.

What is Chaparral Medical Group, Inc.'s specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

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), 114 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 (29), Cardiovascular Disease (Cardiology) (11) and Nurse Practitioner (9). Of these, 2 practice at this address and 80 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 April 22, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.