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DR. ALYSSA MICHELLE ROSARIO MD
NPI 1366947970
Pediatrics in Los Angeles, CA

Active since March 26, 2018PECOS Enrolled
2020 ZONAL AVE # IRD133, LOS ANGELES, CA 90089(818) 427-4917 Get Directions Write a Review

NPPES record last updated: June 29, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Alyssa Michelle Rosario Md NPPES

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

DR. ALYSSA MICHELLE ROSARIO MD (NPI 1366947970) is an individual pediatrics provider in Los Angeles, California, licensed in California (A165226) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS and maintains a secondary practice location in Los Angeles.

NPPES Registry Identity

NPI1366947970
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameDR. ALYSSA MICHELLE ROSARIOCredential: MD
Location Address2020 ZONAL AVE # IRD133Los Angeles, CA 90089-0121
Mailing Address2020 Zonal Ave # Ird133Los Angeles, CA 90089-0121
Phone(818) 427-4917
Sole ProprietorNo
Enumeration DateMarch 26, 2018
Last NPPES UpdateJune 29, 2022
NPPES CertifiedJune 29, 2022
✔ NPI 1366947970 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in CA · A165226
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
2020 ZONAL AVE # IRD133, Los Angeles, CA 90089
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Other Names 1

Former Name (1)Dr. Alyssa Michelle Morse Md

Secondary Practice Location 1

Location 14650 W Sunset Blvd # 68Los Angeles, CA 90027-6062 · Phone (323) 361-2122

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alyssa Michelle Rosario 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.

Medicare Billing Reassignment

Medicare enrollment records show Alyssa Rosario reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Children's Hospital Los Angeles Medical Group, Inc.
5.5 mi
Multi-Specialty
4650 SUNSET BLVD
Los Angeles, CA 90027
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Childrens Hospital Los Angeles Medical Group Inc
  • 1,281 clinicians in this Medicare group
NPI 1265530653 (323) 361-2337

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 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
$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.

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 Alyssa Rosario's NPI number?

The NPI number for Alyssa Rosario is 1366947970. It was assigned to this individual provider in the NPPES registry on March 26, 2018. The provider is also known as Dr. Alyssa Michelle Morse MD.

Where is Alyssa Rosario located?

Alyssa Rosario practices at 2020 Zonal Ave # Ird133, Los Angeles, CA 90089. The listed phone number is (818) 427-4917.

What is Alyssa Rosario's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Alyssa Rosario enrolled in Medicare?

Yes. Alyssa Rosario is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Alyssa Rosario's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alyssa Rosario reassigns Medicare benefits to Children's Hospital Los Angeles Medical Group, Inc. (Los Angeles, CA). The 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 Alyssa Rosario'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 Alyssa Rosario was last updated on June 29, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.