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CAJON MEDICAL GROUP, PC
NPI 1821889320
Internal Medicine in Upland, CA

Active since May 14, 2025
732 N MOUNTAIN AVE STE A, UPLAND, CA 91786(909) 289-4075(909) 363-8233 Get Directions Write a Review

NPPES record last updated: May 14, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Cajon Medical Group, Pc NPPES

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

CAJON MEDICAL GROUP, PC (NPI 1821889320) is a healthcare organization registered as an internal medicine in Upland, California and active in the NPI registry since May 2025. The organization lists Amber Gutierrez, Provider Relations Admin, as its authorized official.

NPPES Registry Identity

NPI1821889320
Entity TypeOrganization
Primary Taxonomy207R00000X
Legal Business NameCAJON MEDICAL GROUP, PC
Location Address732 N MOUNTAIN AVE STE AUpland, CA 91786-4372
Mailing Address1815 W Redlands BlvdRedlands, CA 92373-8054 · (909) 289-4075
Phone(909) 289-4075
Fax(909) 363-8233
Organization SubpartNo
Authorized OfficialAmber GutierrezProvider Relations Admin · (909) 289-4075
Enumeration DateMay 14, 2025
NPPES CertifiedMay 14, 2025
✔ NPI 1821889320 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ 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.
732 N MOUNTAIN AVE STE A, Upland, CA 91786
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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)

Cajon Medical Group, Pc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

33

Medicare enrollment records show 33 clinicians reassign Medicare billing to Cajon Medical Group, PC, which bills Medicare for the services they deliver. Of these, 6 practice within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 4

Nurse Practitioner16
Internal Medicine10
Family Practice4
Registered Dietitian or Nutrition Professional3

Nearest to this location (20)

See all 33
May Zamora
Nurse Practitioner
NPI 1831683234
1520 N MOUNTAIN AVE STE 128
Ontario, CA 91762
(909) 949-9299
✔ PECOS✔ Accepts Medicare1.1 mi
David Sapien, M.D.
Internal Medicine
NPI 1922234889
350 VINTON AVE STE 101
Pomona, CA 91767
(909) 620-5502
✔ PECOS✔ Accepts Medicare4.7 mi
Mehul Sonawala, M.D.
Internal Medicine
NPI 1336166180
887 E 2ND ST
Pomona, CA 91766
(909) 620-7769
✔ PECOS✔ Accepts Medicare5.0 mi
Hemalatha Murugan
Internal Medicine
NPI 1124681580
12611 9TH ST STE A
Chino, CA 91710
(909) 331-4473
✔ PECOS✔ Accepts Medicare5.5 mi
Abena Amankwa, FNP
Nurse Practitioner
NPI 1316291099
4684 ONTARIO MILLS PKWY STE 200
Ontario, CA 91764
(909) 318-3522
✔ PECOS✔ Accepts Medicare7.3 mi
Narinder Singh, MD
Family Practice
NPI 1841867439
1350 W COVINA BLVD
San Dimas, CA 91773
(909) 996-8115
✔ PECOS✔ Accepts Medicare9.5 mi
Sushma Sadula, MD
Internal Medicine
NPI 1104489566
12442 LIMONITE AVE UNIT 205
Eastvale, CA 91752
(909) 429-2864
✔ PECOS✔ Accepts Medicare11 mi
Cherry Thangaraj, FNP-C
Nurse Practitioner
NPI 1003584087
7965 SIERRA AVE
Fontana, CA 92336
(909) 356-4459
✔ PECOS13 mi
Jacqueline Aparicio, NURSE PRACTITIONER
Nurse Practitioner
NPI 1760248207
4440 BROCKTON AVE STE 100
Riverside, CA 92501
(951) 788-8332
✔ PECOS✔ Accepts Medicare19 mi
Carmela Ignacio, NP
Nurse Practitioner
NPI 1134563695
1819 WESTERN AVE
San Bernardino, CA 92411
(909) 898-5101
✔ PECOS✔ Accepts Medicare20 mi
Sachin Chatta, M.D.
Family Practice
NPI 1063906709
742 W HIGHLAND AVE
San Bernardino, CA 92405
(909) 881-7320
✔ PECOS✔ Accepts Medicare21 mi
Lalitha Vakkalanka, M.D.
Internal Medicine
NPI 1194755959
140 E COMMONWEALTH AVE STE 100
Fullerton, CA 92832
(714) 773-4111
✔ PECOS✔ Accepts Medicare22 mi
Nagamani Dandamudi, M.D.,
Internal Medicine
NPI 1184638058
11201 BENTON ST
Loma Linda, CA 92357
(909) 825-7084
✔ PECOS24 mi
Jesus Pacis, NP
Nurse Practitioner
NPI 1215645122
7576 STERLING AVE STE C-D
San Bernardino, CA 92410
(909) 381-8983
✔ PECOS✔ Accepts Medicare24 mi
Balu Gadhe, M.D.
Internal Medicine
NPI 1740233808
11306 MOUNTAIN VIEW AVE STE C
Loma Linda, CA 92354
(909) 255-0108
✔ PECOS25 mi
Florence Whyte, NP
Nurse Practitioner
NPI 1891630778
1815 W REDLANDS BLVD
Redlands, CA 92373
(909) 735-2446
✔ PECOS26 mi
Debra Bogar
Nurse Practitioner
NPI 1962039503
1809 W REDLANDS BLVD
Redlands, CA 92373
(909) 735-2446
✔ PECOS✔ Accepts Medicare26 mi
Maria Garcia-Martinez, M.D.
Internal Medicine
NPI 1336198415
1815 W REDLANDS BLVD
Redlands, CA 92373
(909) 289-4075
✔ PECOS✔ Accepts Medicare26 mi
Laurentiu Istrate, M.D.
Family Practice
NPI 1437416179
1815 W REDLANDS BLVD
Redlands, CA 92373
(909) 289-4075
✔ PECOS✔ Accepts Medicare26 mi
Diana Uribe-Tanus, RDN
Registered Dietitian or Nutrition Professional
NPI 1780069054
43651 DEVYN LN
Lancaster, CA 93535
(818) 284-1818
✔ Accepts Medicare46 mi
See all 33 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 Cajon Medical Group, PC's NPI number?

The NPI number for Cajon Medical Group, PC is 1821889320. It was assigned to this organization in the NPPES registry on May 14, 2025.

Where is Cajon Medical Group, PC located?

Cajon Medical Group, PC is located at 732 N Mountain Ave Ste A, Upland, CA 91786. The listed phone number is (909) 289-4075.

What is Cajon Medical Group, PC's specialty?

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

Is Cajon Medical Group, PC enrolled in Medicare?

Yes. Cajon Medical Group, PC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Cajon Medical Group, PC?

According to the CMS Revalidation Reassignment List (October 2026 release), 33 clinicians in 4 Medicare specialties reassign their Medicare billing to Cajon Medical Group, PC. 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 Nurse Practitioner (16), Internal Medicine (10) and Family Practice (4). Of these, 6 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 Cajon Medical Group, PC was last updated on May 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 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.