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MARK WESLEY BUSTILLO CO
NPI 1477929461
Nurse Practitioner in Sylmar, CA

Active since August 13, 2015PECOS Enrolled
14445 OLIVE VIEW DR, SYLMAR, CA 91342(747) 210-3000 Get Directions Write a Review

NPPES record last updated: April 16, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Apr 16, 2026, Oct 5, 2022, Dec 17, 2019 (3 updates tracked since 2019).

About Mark Wesley Bustillo Co NPPES

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

MARK WESLEY BUSTILLO CO (NPI 1477929461) is an individual nurse practitioner in Sylmar, California, licensed in California (95013538) and active in the NPI registry since August 2015. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1477929461
Entity TypeIndividualMale
Primary Taxonomy363L00000X
Provider Legal NameMARK WESLEY BUSTILLO CO
Location Address14445 OLIVE VIEW DRSylmar, CA 91342-1438
Mailing Address14445 Olive View DrSylmar, CA 91342-1438 · (747) 210-3000
Phone(747) 210-3000
Sole ProprietorYes
Enumeration DateAugust 13, 2015
Last NPPES UpdateApril 16, 20263 updates tracked since enumeration
NPPES CertifiedApril 16, 2026
✔ NPI 1477929461 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in CA · 95013538
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
Also ListedRegistered Nurse · Psychiatric/Mental HealthTaxonomy 163WP0808X · License 697369 (CA)
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License 95013538 (CA)
14445 OLIVE VIEW DR, Sylmar, CA 91342
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark Wesley Bustillo Co 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.

Medicare Billing Reassignments

2

Medicare enrollment records show Mark Wesley Co reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Los Angeles County Department Of Mental Health
Same address
Mental Health (Including Community Mental Health Center)
14445 OLIVE VIEW DR
Sylmar, CA 91342
  • Reassigned Medicare billing, California enrollment
  • 533 clinicians in this Medicare group
NPI 1316955750 (818) 832-2400
County Of Los Angeles Auditor Controller
0.2 mi
General Acute Care Hospital
14445 OLIVE VIEW DR
Sylmar, CA 91342
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: County Of Los Angeles
  • 1,939 clinicians in this Medicare group
NPI 1134159320 (818) 364-3031

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91342 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
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 20

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

COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555
DENNIS POON
Nurse Practitioner (Family)
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3000
SERENA KE MD
Student in an Organized Health Care Education/Training Program
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-3205
DR. PAUL I LIU M.D.
Pathology (Anatomic Pathology & Clinical Pathology)
14445 OLIVE VIEW DR, ROOM 1A116
SYLMAR, CA 91342
Los Angeles County (818) 364-4033
DR. ARTHUR JENG M.D.
Internal Medicine (Infectious Disease)
14445 OLIVE VIEW DR, 2B182
SYLMAR, CA 91342
Los Angeles County (818) 364-3205
MRS. CECILIA CORONADO PTA
Physical Therapy Assistant
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (747) 210-4245
COUNTY OF LOS ANGELES AUDITOR CONTROLLER
General Acute Care Hospital
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-1555
MR. ANDRIY A KUZNETSOV PT
Physical Therapist
14445 OLIVE VIEW DR
SYLMAR, CA 91342
Los Angeles County (818) 364-4245

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 Mark Wesley Co's NPI number?

The NPI number for Mark Wesley Co is 1477929461. It was assigned to this individual provider in the NPPES registry on August 13, 2015.

Where is Mark Wesley Co located?

Mark Wesley Co practices at 14445 Olive View Dr, Sylmar, CA 91342. The listed phone number is (747) 210-3000.

What is Mark Wesley Co's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Mark Wesley Co enrolled in Medicare?

Yes. Mark Wesley Co is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mark Wesley Co's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Wesley Co reassigns Medicare benefits to 2 organizations: Los Angeles County Department Of Mental Health (Sylmar, CA) and County Of Los Angeles Auditor Controller (Sylmar, 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 Mark Wesley Co'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 Mark Wesley Co was last updated on April 16, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.