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CHAPARRAL MEDICAL GROUP INC
NPI 1205898335
Dermatology in Upland, CA

Active since April 04, 2006CLIA Certified · 2 labs
585 NORTH MOUNTAIN AVE, SUITE A, UPLAND, CA 91786(909) 946-2228(909) 946-8007 Get Directions Write a Review

NPPES record last updated: October 17, 2007. 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 1205898335) is a healthcare organization registered as a dermatology in Upland, California and active in the NPI registry since April 2006. The organization holds 2 active CLIA laboratory certificates and lists Adrienne M Walker, Contracts Administrator, as its authorized official.

NPPES Registry Identity

NPI1205898335
Entity TypeOrganization
Primary Taxonomy207N00000X
Legal Business NameCHAPARRAL MEDICAL GROUP INC
Location Address585 NORTH MOUNTAIN AVE, SUITE AUpland, CA 91786-8516
Mailing Address840 Towne Center Dr, Administrative ResourcesPomona, CA 91767-5900 · (909) 398-1550 · Fax (909) 398-1573
Phone(909) 946-2228
Fax(909) 946-8007
Organization SubpartNo
Authorized OfficialAdrienne M WalkerContracts Administrator · (909) 398-1550
Enumeration DateApril 4, 2006
Last NPPES UpdateOctober 17, 2007
✔ NPI 1205898335 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatologyAllopathic & Osteopathic Physicians
Taxonomy Code207N00000X
Definition
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
585 NORTH MOUNTAIN AVE, Upland, CA 91786
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Other Identifiers 2

Medicare PINZZZ03017ZCA
MedicaidGR005295DCA

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

99

Medicare 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

Internal Medicine21
Nurse Practitioner15
Cardiovascular Disease (Cardiology)9
Pulmonary Disease7
Family Practice6
Dermatology4
Endocrinology4
General Surgery4
14 other specialties29

Nearest to this location (20)

See all 99
Mysore Nagaraja, M.D.
Gastroenterology
NPI 1760451298
811 E 11TH ST STE 208
Upland, CA 91786
(909) 982-2279
✔ PECOS✔ Accepts Medicare1.6 mi
Donna Dudziak, M.D.
General Surgery
NPI 1275630568
901 SAN BERNARDINO RD STE 301
Upland, CA 91786
(909) 946-6221
✔ PECOS✔ Accepts Medicare1.8 mi
Peter Niciforos, M.D.
Family Practice
NPI 1356359277
330 N D ST STE 300
San Bernardino, CA 92401
(909) 888-6602
✔ PECOS2.2 mi
Padmini Tummala, MD
Cardiovascular Disease (Cardiology)
NPI 1669519500
914 W FOOTHILL BLVD STE A
Upland, CA 91786
(909) 285-6717
✔ PECOS✔ Accepts Medicare2.5 mi
Pratibha Kayastha
Nurse Practitioner
NPI 1942601281
585 N MOUNTAIN AVE SUITE A
Upland, CA 91786
(909) 946-2228
✔ PECOS3.0 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 Medicare3.6 mi
Annie Nguyen, NP
Nurse Practitioner
NPI 1992580559
8330 RED OAK ST STE 101
Rancho Cucamonga, CA 91730
(909) 987-4922
✔ PECOS3.6 mi
Lydia Reyes, NP
Nurse Practitioner
NPI 1447552229
8330 RED OAK STREET STE 101
Rancho Cucamonga, CA 91730
(909) 987-4922
✔ PECOS3.6 mi
Nyein Tint, M.D.
Internal Medicine
NPI 1336533447
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.6 mi
Khader Abounasr, MD
Pulmonary Disease
NPI 1780884015
8330 RED OAK ST SUITE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.6 mi
Harvey Cohen, MD
Internal Medicine
NPI 1972517423
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.6 mi
Paul Kim
Nurse Practitioner
NPI 1356208409
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ PECOS✔ Accepts Medicare3.6 mi
Aftab Qadir, MD
Internal Medicine
NPI 1851753545
8330 RED OAK ST STE 201
Rancho Cucamonga, CA 91730
(909) 987-2528
✔ 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
1131 W 6TH ST STE 150
Ontario, CA 91762
(909) 482-4462
✔ 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
Maria Velma Yep, DNP, APRN, GNP-BC
Nurse Practitioner
NPI 1316090103
9190 HAVEN AVE STE 102
Rancho Cucamonga, CA 91730
(909) 527-8110
✔ PECOS3.8 mi
Heather Davis Kingston, MD
Pulmonary Disease
NPI 1154390391
1601 MONTE VISTA AVE STE 270
Claremont, CA 91711
(909) 865-9152
✔ PECOS✔ Accepts Medicare4.3 mi
See all 99 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

CLIA Laboratory Certificates CMS CLIA 2

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Waiver 05D0976893

Chaparral Medical Group Inc · Pomona, CA
Active · expires Aug 15, 2028
CLIA Number05D0976893
Laboratory TypePhysician Office
Certificate Effective DateAugust 16, 2026
Certificate Expiration DateAugust 15, 2028
Laboratory DirectorDaryoosh Valamanesh
Laboratory Phone(909) 398-1550
Laboratory LocationChaparral Medical Group Inc1866 N Orange Grove Ave, Pomona, CA 91767
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Certificate of Waiver 05D0895903

Chaparral Medical Group Inc · Pomona, CA
Active · expires Dec 19, 2026
CLIA Number05D0895903
Laboratory TypePhysician Office
Certificate Effective DateDecember 20, 2024
Certificate Expiration DateDecember 19, 2026
Laboratory DirectorNazia Siddiqi
Laboratory Phone(909) 398-1550
Laboratory LocationChaparral Medical Group Inc790 E Bonita Ave 2nd Floor, Pomona, CA 91767
CLIA data matches this NPI record on: Name Phone
This certificate is issued to a laboratory to perform only waived tests.

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 1205898335. It was assigned to this organization in the NPPES registry on April 4, 2006.

Where is Chaparral Medical Group Inc located?

Chaparral Medical Group Inc is located at 585 North Mountain Ave Suite A, Upland, CA 91786. The listed phone number is (909) 946-2228.

What is Chaparral Medical Group Inc's specialty?

The primary specialty registered for this NPI is Dermatology with taxonomy code 207N00000X.

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.

Does Chaparral Medical Group Inc hold CLIA laboratory certificates?

Yes. 2 active CLIA laboratory certificates are associated with this NPI under the federal Clinical Laboratory Improvement Amendments program. The certificates are listed in the CLIA Laboratory Certificates section above.

When was this NPI record last updated?

The NPPES record for Chaparral Medical Group Inc was last updated on October 17, 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.