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MELISSA OTA DDS
NPI 1821498940
Dentist - General Practice in Irvine, CA

Active since August 26, 2014PECOS Enrolled
2 OSBORN ST STE 140, IRVINE, CA 92604(929) 525-2522 Get Directions Write a Review

NPPES record last updated: April 9, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 9, 2026, Jun 8, 2023 (2 updates tracked since 2023).

About Melissa Ota Dds NPPES

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

MELISSA OTA DDS (NPI 1821498940) is an individual general practice provider in Irvine, California, licensed in California (63289) and active in the NPI registry since August 2014. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2014).

NPPES Registry Identity

NPI1821498940
Entity TypeIndividualFemale
Primary Taxonomy1223G0001X
Provider Legal NameMELISSA OTACredential: DDS
Location Address2 OSBORN ST STE 140Irvine, CA 92604-8656
Mailing Address109 SuperiorIrvine, CA 92620-2225
Phone(929) 525-2522
Sole ProprietorYes
Medical School CMSOtherGraduated 2014
Enumeration DateAugust 26, 2014
Last NPPES UpdateApril 9, 20262 updates tracked since enumeration
NPPES CertifiedApril 9, 2026
✔ NPI 1821498940 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers
Taxonomy Code1223G0001X
License✔ Licensed in CA · 63289
Definition
A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.
2 OSBORN ST STE 140, Irvine, CA 92604
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Secondary Practice Locations 2

Location 11500 Duarte RdDuarte, CA 91010-3012 · Phone (800) 826-4673
Location 21000 FivepointIrvine, CA 92618-2621 · Phone (888) 333-4673

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Melissa Ota Dds is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID4981189065
PECOS Enrollment IDI20260326002187
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 Melissa Ota reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

City Of Hope Medical Foundation
41 mi
Hematology & Oncology
1500 DUARTE RD
Duarte, CA 91010
  • Reassigned Medicare billing, California enrollment
  • 1,335 clinicians in this Medicare group
NPI 1871886366 (626) 256-4673

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 92604 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
$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 2

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

DR. CRAIG KENJI OTA D.D.S
Dentist (General Practice)
2 OSBORN ST STE 140
IRVINE, CA 92604
Orange County (949) 525-2522
DR. THOMAS LYNN ALEXANDER DDS
Dentist
2 OSBORN ST STE 140
IRVINE, CA 92604
Orange County (949) 857-2004

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 Melissa Ota's NPI number?

The NPI number for Melissa Ota is 1821498940. It was assigned to this individual provider in the NPPES registry on August 26, 2014.

Where is Melissa Ota located?

Melissa Ota practices at 2 Osborn St Ste 140, Irvine, CA 92604. The listed phone number is (929) 525-2522.

What is Melissa Ota's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Is Melissa Ota enrolled in Medicare?

Yes. Melissa Ota is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Melissa Ota's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Ota reassigns Medicare benefits to City Of Hope Medical Foundation (Duarte, 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 Melissa Ota'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 Melissa Ota was last updated on April 9, 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.