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MS. MARYELLEN KATHRYN SHANNON MD
NPI 1033227483
Obstetrics & Gynecology in Irvine, CA

Active since August 27, 2006PECOS Enrolled
6 HUGHES, STE 100, IRVINE, CA 92618(949) 680-1880(949) 680-1881 Get Directions Write a Review

NPPES record last updated: January 2, 2015. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ms. Maryellen Kathryn Shannon Md NPPES

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

MS. MARYELLEN KATHRYN SHANNON MD (NPI 1033227483) is an individual obstetrics & gynecology provider in Irvine, California, licensed in Arizona (AZ19717) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1033227483
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMS. MARYELLEN KATHRYN SHANNONCredential: MD
Location Address6 HUGHES, STE 100Irvine, CA 92618-2059
Mailing Address6 Hughes, Ste 100Irvine, CA 92618-2059 · (949) 680-1880 · Fax (949) 680-1881
Phone(949) 680-1880
Fax(949) 680-1881
Sole ProprietorNo
Enumeration DateAugust 27, 2006
Last NPPES UpdateJanuary 2, 2015
✔ NPI 1033227483 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in AZ · AZ19717
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
6 HUGHES, Irvine, CA 92618
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Other Identifiers 3

Medicaid04886AZ
Medicare UPINE94380
Medicare ID-Type Unspecified16WCKFB01

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Maryellen Kathryn Shannon 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 Maryellen Shannon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

South Coast Medical Center For New Medicine,.Inc
0.2 mi
General Practice
6 HUGHES, SUITE 100
Irvine, CA 92618
  • Reassigned Medicare billing, California enrollment
  • 6 clinicians in this Medicare group
NPI 1891939351 (949) 680-1880

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 92618 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
$77.96 typical visit price
range $20.84 – $153.61
Typical copayment $19.49 (range $5.21 – $38.40)
Most-billed visit code 99213
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 14

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

BITA MEDICAL, INC.
Family Medicine
6 HUGHES, SUITE 100
IRVINE, CA 92618
Orange County (949) 680-1880
BRANDI H MORINOUE PA-C
Physician Assistant
6 HUGHES, SUITE 100
IRVINE, CA 92618
Orange County (949) 680-1880
ALVIN M YEE A MEDICAL CORPORATION
General Practice
6 HUGHES, SUITE 100
IRVINE, CA 92618
Orange County (949) 680-1880
SUZANNE KIM MD
Family Medicine
6 HUGHES
IRVINE, CA 92618
Orange County (949) 680-1880
MARC PANA PROFESSIONAL DENTAL CORPORATION
Dentist (Orthodontics and Dentofacial Orthopedics)
6 HUGHES, SUITE 100
IRVINE, CA 92618
Orange County (877) 358-3915
DR. LEIGH ERIN CONNEALY M.D.
Family Medicine
6 HUGHES, STE 100
IRVINE, CA 92618
Orange County (949) 680-1880
QUALIUM CORP
Clinic/Center (Sleep Disorder Diagnostic)
6 HUGHES, SUITE 110
IRVINE, CA 92618
Orange County (866) 887-6673
LILIANA PARTIDA I
Nutritionist (Nutrition, Education)
6 HUGHES, STE 100
IRVINE, CA 92618
Orange County (949) 680-1880

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 Maryellen Shannon's NPI number?

The NPI number for Maryellen Shannon is 1033227483. It was assigned to this individual provider in the NPPES registry on August 27, 2006.

Where is Maryellen Shannon located?

Maryellen Shannon practices at 6 Hughes Ste 100, Irvine, CA 92618. The listed phone number is (949) 680-1880.

What is Maryellen Shannon's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Maryellen Shannon enrolled in Medicare?

Yes. Maryellen Shannon is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Maryellen Shannon's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Maryellen Shannon reassigns Medicare benefits to South Coast Medical Center For New Medicine,.Inc (Irvine, 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 Maryellen Shannon'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 Maryellen Shannon was last updated on January 2, 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.