DR. MARIA LOURDES CASTANOS DE LEON M.D.
NPI 1285775437
General Practice in South Gate, CA

Q: What is Maria Lourdes De Leon's NPI number?

The NPI number for Maria Lourdes De Leon is 1285775437. It was assigned to this individual provider in the NPPES registry on February 9, 2007.

Q: What is Maria Lourdes De Leon's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Active since February 09, 2007PECOS EnrolledAccepts Medicare Assignment

4.7/100

CMS Quality Rating

9916 SAN JUAN AVE, SOUTH GATE, CA 90280(323) 564-1100(323) 564-1133 Get Directions Write a Review

NPPES record last updated: May 21, 2015. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Maria Lourdes Castanos De Leon M.d. NPPES

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

DR. MARIA LOURDES CASTANOS DE LEON M.D. (NPI 1285775437) is an individual general practice provider in South Gate, California, licensed in California (A73468) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of Other (1986).

NPPES Registry Identity

NPI1285775437

Entity TypeIndividualFemale

Primary Taxonomy208D00000X

Provider Legal NameDR. MARIA LOURDES CASTANOS DE LEONCredential: M.D.

Location Address9916 SAN JUAN AVESouth Gate, CA 90280-6108

Mailing Address2933 Whittier BlvdLos Angeles, CA 90023-1528 · (323) 263-2669 · Fax (323) 263-2673

Phone(323) 564-1100

Fax(323) 564-1133

Sole ProprietorNo

Medical School CMSOtherGraduated 1986

Enumeration DateFebruary 9, 2007

Last NPPES UpdateMay 21, 2015

✔ NPI 1285775437 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyGeneral PracticeAllopathic & Osteopathic Physicians

Taxonomy Code208D00000X

License✔ Licensed in CA · A73468

Definition

A physician who specializes in the general practice of diagnosing, treating, and managing patients with a variety of illnesses and conditions. Source: National Uniform Claim Committee

Also ListedPediatricsTaxonomy 208000000X · License A73468 (CA)

9916 SAN JUAN AVE, South Gate, CA 90280

Open in Google Maps ↗

Other Identifiers 1

Medicare UPIN00A734680CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Maria Lourdes Castanos De Leon M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3971685355

PECOS Enrollment IDI20080123000858

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.

Medicare Billing Reassignments

Medicare enrollment records show Maria Lourdes De Leon reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bella Medical Group Inc

6.0 mi

Family Medicine

2933 WHITTIER BLVD
Los Angeles, CA 90023

Reassigned Medicare billing, California enrollment

NPI 1710261284 (323) 263-2669

California Mobile Medical Group Inc

14 mi

Family Medicine

130 N BRAND BLVD STE 208
Glendale, CA 91203

Reassigned Medicare billing, California enrollment
18 clinicians in this Medicare group

NPI 1588439061 (818) 945-6003

Mobile Medical Group Inc

14 mi

Family Medicine

130 N BRAND BLVD STE 301
Glendale, CA 91203

Reassigned Medicare billing, California enrollment
20 clinicians in this Medicare group

NPI 1487169660 (818) 945-6003

California Mobile Doctors Group Inc

18 mi

Family Medicine

1317 W WEST COVINA PKWY STE B
West Covina, CA 91790

Reassigned Medicare billing, California enrollment
16 clinicians in this Medicare group

NPI 1427672385 (310) 733-8706

Prime Health Assessment Medical Group Inc

98 mi

Clinic/Center

4050 AIRPORT CENTER DR STE B1
Palm Springs, CA 92264

Reassigned Medicare billing, California enrollment
4 clinicians in this Medicare group

NPI 1164100061 (916) 897-7321

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

Areas of Expertise CMS Part B claims 13

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Physician or allowed practitioner supervision of a patient receiving medicare-covered services provided by a participating home health agency (patient not present) requiring complex and multidisciplinary care modalities involving regular physician or allow G0181

This service involves a physician overseeing your care while you receive Medicare-covered services from a home health agency. The care you're receiving is complex and involves various disciplines. The physician isn't physically present but regularly supervises your treatment to ensure optimal health outcomes.

8,860 services1,947 patients

Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and G0180

This is a service where a doctor or authorized practitioner certifies that you require Medicare-covered home health services. They will communicate with the home health agency and review reports on your health status to ensure you receive appropriate care. This does not involve an in-person visit.

1,968 services1,710 patients

Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a G0179

This procedure involves a doctor or approved practitioner reviewing your health status and re-certifying your need for Medicare-covered home health services. It includes communication with the home health agency and assessment of your health reports, even when you're not physically present.

1,952 services1,487 patients

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349

An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.

873 services680 patients

Education and training to self measure blood pressure 99473

Education and training to self-measure blood pressure involves teaching you how to use a home blood pressure monitor correctly. You'll learn how to position the cuff, when and how often to take readings, and how to interpret and record the results. This empowers you to manage your health.

827 services646 patients

Advance care planning, first 30 minutes 99497

Advance care planning is a process where you discuss your healthcare preferences with your doctor. This conversation, lasting up to 30 minutes, helps ensure your wishes are respected if you're unable to communicate them in the future. It's about your care, your way.

646 services557 patients

Smoking and tobacco use intensive counseling, more than 10 minutes 99407

This service involves an in-depth discussion about the risks of smoking and tobacco use, spanning over 10 minutes. It provides personalized strategies to quit smoking, including coping techniques for withdrawal symptoms and triggers. The goal is to support your journey towards a healthier lifestyle.

125 services107 patients

Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439

An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.

117 services117 patients

Residence visit for new patient with high level of medical decision making, per day, if using time, at least 75 minutes 99345

A new patient home visit is a comprehensive 75-minute appointment conducted at your home. The healthcare professional will assess your health, discuss any concerns, and create a personalized care plan. It's convenient, comfortable, and tailored to your specific needs.

107 services107 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

103 services37 patients

Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes 99344

A new patient home visit is a comprehensive service where a healthcare professional visits your home for about an hour. This visit includes an overall health assessment, discussion about your medical history, and planning for future healthcare needs. The goal is to understand your health status and provide personalized care.

101 services101 patients

Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit G0438

An annual wellness visit is a yearly appointment with your doctor to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's an opportunity to discuss your health status and goals and get a plan tailored for you.

36 services36 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

16 services11 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

4.7/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Individually scored

Quality

Improvement Activities

Cost

15.69

Referred Medical Equipment & Supplies CMS DME claims 7

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253

DME-Other DME · category DE017N

14 suppliers30 claims51 services$5.35 avg. paid by Medicare

Lancets, per box of 100 A4259

DME-Medical/Surgical Supplies · category DA000N

12 suppliers23 claims25 services$0.82 avg. paid by Medicare

Hospital bed, semi-electric (head and foot adjustment), with any type side rails, with mattress E0260

DME-Hospital Beds · category DB000N

2 suppliers27 claims27 services$37.67 avg. paid by Medicare

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431

DME-Oxygen and Supplies · category DC000N

2 suppliers17 claims17 services$14.84 avg. paid by Medicare

Multi-positional patient transfer system, with integrated seat, operated by care giver, patient weight capacity up to and including 300 lbs E1035

DME-Other DME · category DE000N

2 suppliers11 claims11 services$383.00 avg. paid by Medicare

Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390

DME-Oxygen and Supplies · category DC002N

2 suppliers17 claims17 services$67.36 avg. paid by Medicare

Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

MONICA DIAZ PAC

Physician Assistant (Medical)

9916 SAN JUAN AVE
SOUTH GATE, CA 90280

Los Angeles County (323) 564-1100

BELLA MEDICAL GROUP INC

Family Medicine

9916 SAN JUAN AVE
SOUTH GATE, CA 90280

Los Angeles County (323) 564-1100

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 Maria Lourdes De Leon's NPI number?

The NPI number for Maria Lourdes De Leon is 1285775437. It was assigned to this individual provider in the NPPES registry on February 9, 2007.

Where is Maria Lourdes De Leon located?

Maria Lourdes De Leon practices at 9916 San Juan Ave, South Gate, CA 90280. The listed phone number is (323) 564-1100.

What is Maria Lourdes De Leon's specialty?

The primary specialty registered for this NPI is General Practice with taxonomy code 208D00000X.

Is Maria Lourdes De Leon enrolled in Medicare?

Yes. Maria Lourdes De Leon is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Maria Lourdes De Leon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Maria Lourdes De Leon reassigns Medicare benefits to 5 organizations: Bella Medical Group Inc (Los Angeles, CA), California Mobile Medical Group Inc (Glendale, CA), Mobile Medical Group Inc (Glendale, CA), California Mobile Doctors Group Inc (West Covina, CA) and Prime Health Assessment Medical Group Inc (Palm Springs, CA). Each 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 Maria Lourdes De Leon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Maria Lourdes De Leon was last updated on May 21, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.