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DR. LOUIE-MARC CONTRERAS
NPI 1629088661
Specialist in Valencia, CA

Active since August 09, 2006PECOS Enrolled
25775 MCBEAN PKWY STE 216, VALENCIA, CA 91355(310) 770-3033(562) 291-1153 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Louie-marc Contreras NPPES

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

DR. LOUIE-MARC CONTRERAS (NPI 1629088661) is an individual specialist in Valencia, California, licensed in California (A72134) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Loma Linda University School Of Medicine (1998).

NPPES Registry Identity

NPI1629088661
Entity TypeIndividualMale
Primary Taxonomy174400000X
Provider Legal NameDR. LOUIE-MARC CONTRERAS
Location Address25775 MCBEAN PKWY STE 216Valencia, CA 91355-3703
Mailing AddressPo Box 40373Downey, CA 90239-1373
Phone(310) 770-3033
Fax(562) 291-1153
Sole ProprietorYes
Medical School CMSLoma Linda University School Of MedicineGraduated 1998
Enumeration DateAugust 9, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1629088661 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License✔ Licensed in CA · A72134
Definition
An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.
25775 MCBEAN PKWY STE 216, Valencia, CA 91355
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Other Identifiers 2

Medicare ID-Type UnspecifiedA72134CA
Medicare UPINI27969CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Louie-marc Contreras is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID7113965054
PECOS Enrollment IDI20050428001293
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

3

Medicare enrollment records show Louie-marc Contreras reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Louie-Marc G Contreras MD Corp
1.3 mi
Specialist
25775 MCBEAN PKWY STE 216
Valencia, CA 91355
  • Reassigned Medicare billing, California enrollment
NPI 1508977000 (909) 338-9882
Henry Mayo Newhall Memorial Hospital
1.4 mi
General Acute Care Hospital
23845 MCBEAN PKWY
Valencia, CA 91355
  • Reassigned Medicare billing, California enrollment
  • 24 clinicians in this Medicare group
NPI 1780668434 (661) 253-8000
Healthcare Partners Affiliates Medical Group
31 mi
Internal Medicine
1120 W WASHINGTON BLVD
Los Angeles, CA 90015
  • Reassigned Medicare billing, California enrollment
  • 2,052 clinicians in this Medicare group
NPI 1659312593 (213) 623-2225

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 7

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
97 services52 patients
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231
Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.
81 services49 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
42 services42 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
37 services37 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
21 services13 patients
Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
19 services19 patients

Other Providers at the Same Location NPPES

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

LOUIE-MARC G CONTRERAS MD CORP
Specialist
25775 MCBEAN PKWY STE 216
VALENCIA, CA 91355
Los Angeles County (909) 338-9882

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 Louie-marc Contreras's NPI number?

The NPI number for Louie-marc Contreras is 1629088661. It was assigned to this individual provider in the NPPES registry on August 9, 2006.

Where is Louie-marc Contreras located?

Louie-marc Contreras practices at 25775 Mcbean Pkwy Ste 216, Valencia, CA 91355. The listed phone number is (310) 770-3033.

What is Louie-marc Contreras's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Louie-marc Contreras enrolled in Medicare?

Yes. Louie-marc Contreras is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Louie-marc Contreras's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Louie-marc Contreras reassigns Medicare benefits to 3 organizations: Louie-Marc G Contreras MD Corp (Valencia, CA), Henry Mayo Newhall Memorial Hospital (Valencia, CA) and Healthcare Partners Affiliates Medical Group (Los Angeles, 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 Louie-marc Contreras'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 Louie-marc Contreras was last updated on July 8, 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.