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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. RONALD CASTILLO TEJADA JR. MD
NPI 1407165079
Internal Medicine in Carson, CA

Active since September 30, 2010PECOS Enrolled
20920 CHICO ST, CARSON, CA 90746(424) 444-5097(833) 973-3630 Get Directions Write a Review

NPPES record last updated: August 26, 2026. Verified against the NPPES registry weekly; last sync: September 06, 2026.

About Dr. Ronald Castillo Tejada Jr. Md NPPES

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

DR. RONALD CASTILLO TEJADA JR. MD (NPI 1407165079) is an individual internal medicine provider in Carson, California, licensed in California (A118334) and active in the NPI registry since September 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1407165079
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. RONALD CASTILLO TEJADA JR.Credential: MD
Location Address20920 CHICO STCarson, CA 90746-3603
Mailing Address3300 E South St, Suite 205Lakewood, CA 90805-4549 · (562) 531-0377 · Fax (562) 531-1724
Phone(424) 444-5097
Fax(833) 973-3630
Sole ProprietorYes
Enumeration DateSeptember 30, 2010
Last NPPES UpdateAugust 26, 2026
NPPES CertifiedAugust 26, 2026
✔ NPI 1407165079 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
Licenses✔ Licensed in CA · A118334✔ Licensed in IL · 036130801
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.
20920 CHICO ST, Carson, CA 90746
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Ronald Castillo Tejada Jr. Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90746 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

APARNA S AKOLKAR MD
Internal Medicine
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (888) 530-4415
KRISTIN GRACE WONG PA-C
Physician Assistant
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (888) 530-4415
ROSA MARIA GARCIA
Student in an Organized Health Care Education/Training Program
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (562) 743-1116
ANNIE DUONG OTR/L
Occupational Therapist
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (424) 444-5175
ALLYL ALEJAN SORIANO MSN, APRN, FNP-C
Nurse Practitioner (Family)
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (424) 444-5097
ROMAN EMMANUEL ACEBEDO
Nurse Practitioner (Gerontology)
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (424) 444-5097
MRS. MARIETTA JOY LUZON-VIDAD NP
Nurse Practitioner (Family)
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (424) 444-5097
PROF. DIONNE LASHON HENDERSON PA-C
Physician Assistant (Medical)
20920 CHICO ST
CARSON, CA 90746
Los Angeles County (424) 333-9151

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 Ronald Tejada's NPI number?

The NPI number for Ronald Tejada is 1407165079. It was assigned to this individual provider in the NPPES registry on September 30, 2010.

Where is Ronald Tejada located?

Ronald Tejada practices at 20920 Chico St, Carson, CA 90746. The listed phone number is (424) 444-5097.

What is Ronald Tejada's specialty?

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

Is Ronald Tejada enrolled in Medicare?

Yes. Ronald Tejada is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Ronald Tejada was last updated on August 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 days 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.