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LEONCIO RAMON DIAZ M.D.
NPI 1609511161
Internal Medicine - Pulmonary Disease in Los Angeles, CA

Active since April 29, 2022PECOS Enrolled
2020 ZONAL AVE # IRD720, LOS ANGELES, CA 90089(323) 226-7923 Get Directions Write a Review

NPPES record last updated: September 11, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 11, 2025, Jun 13, 2025, Apr 29, 2022 (3 updates tracked since 2022).

About Leoncio Ramon Diaz M.d. NPPES

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

LEONCIO RAMON DIAZ M.D. (NPI 1609511161) is an individual pulmonary disease provider in Los Angeles, California, licensed in California (202419) and active in the NPI registry since April 2022. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1609511161
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameLEONCIO RAMON DIAZCredential: M.D.
Location Address2020 ZONAL AVE # IRD720Los Angeles, CA 90089-0121
Mailing Address2020 Zonal Ave # Ird720Los Angeles, CA 90089-0121
Phone(323) 226-7923
Sole ProprietorNo
Enumeration DateApril 29, 2022
Last NPPES UpdateSeptember 11, 20253 updates tracked since enumeration
NPPES CertifiedJune 13, 2025
✔ NPI 1609511161 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in CA · 202419
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
2020 ZONAL AVE # IRD720, Los Angeles, CA 90089
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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)

Leoncio Ramon Diaz M.d. 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 90089 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 2

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

KATHERINE LEGER MD
Internal Medicine
2020 ZONAL AVE # IRD720
LOS ANGELES, CA 90089
Los Angeles County (323) 409-7184
DR. CODIE CLAYTON LAVOIE MD, FRCPC
Student in an Organized Health Care Education/Training Program
2020 ZONAL AVE # IRD720
LOS ANGELES, CA 90089
Los Angeles County (323) 409-7184

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 Leoncio Diaz's NPI number?

The NPI number for Leoncio Diaz is 1609511161. It was assigned to this individual provider in the NPPES registry on April 29, 2022.

Where is Leoncio Diaz located?

Leoncio Diaz practices at 2020 Zonal Ave # Ird720, Los Angeles, CA 90089. The listed phone number is (323) 226-7923.

What is Leoncio Diaz's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

Is Leoncio Diaz enrolled in Medicare?

Yes. Leoncio Diaz is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Leoncio Diaz was last updated on September 11, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.