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NOLAN RYAN UNG
NPI 1861989766
Psychiatry & Neurology - Child & Adolescent Psychiatry in Orange, CA

Active since April 16, 2018PECOS Enrolled
101 THE CITY DR S, ORANGE, CA 92868(714) 456-5770 Get Directions Write a Review

NPPES record last updated: May 26, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: May 26, 2022, Aug 1, 2019, Jul 9, 2019 and 1 more (4 updates tracked since 2018).

About Nolan Ryan Ung NPPES

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

NOLAN RYAN UNG (NPI 1861989766) is an individual child & adolescent psychiatry provider in Orange, California, licensed in California (A163403) and active in the NPI registry since April 2018. He is enrolled in Medicare PECOS and maintains a secondary practice location in Torrance.

NPPES Registry Identity

NPI1861989766
Entity TypeIndividualMale
Primary Taxonomy2084P0804X
Provider Legal NameNOLAN RYAN UNG
Location Address101 THE CITY DR SOrange, CA 92868-3201
Mailing Address101 The City Dr SOrange, CA 92868-3201 · (714) 456-5770
Phone(714) 456-5770
Sole ProprietorYes
Enumeration DateApril 16, 2018
Last NPPES UpdateMay 26, 20224 updates tracked since enumeration
NPPES CertifiedJuly 12, 2021
✔ NPI 1861989766 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
License✔ Licensed in CA · A163403
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
Also ListedSpecialistTaxonomy 174400000X
101 THE CITY DR S, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Location 1

Location 11000 W Carson StTorrance, CA 90502-2004 · Phone (310) 222-3151

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Nolan Ryan Ung 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 Nolan Ung reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Nolan R Ung MD Inc
13 mi
Adult Mental Health
727 WEST RD
La Habra Heights, CA 90631
  • Reassigned Medicare billing, California enrollment
NPI 1659144640 (909) 936-2631

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 2

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.

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes 99349
An established patient home visit is a medical appointment conducted at your home, typically lasting around 40 minutes. This service is ideal for patients who may find it difficult to travel to a healthcare facility. During this visit, a healthcare professional will evaluate your health status, manage your care, and answer any health-related questions you may have.
100 services53 patients
Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes 99344
A new patient home visit is a comprehensive service where a healthcare professional visits your home for about an hour. This visit includes an overall health assessment, discussion about your medical history, and planning for future healthcare needs. The goal is to understand your health status and provide personalized care.
60 services60 patients

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.

DR. ANKIT BHUPENDRA PATEL D.O.
Radiology (Diagnostic Radiology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-5113
DR. LAURA CATHERINE SKOCZYLAS MD
Obstetrics & Gynecology
101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868
Orange County (714) 456-8224
MICHAEL CHENG DO
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7110
AESTHETIC AND PLASTIC SURGERY INSTITUTE
Plastic Surgery
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-2986
JOSEPH VILLARREAL M.D.
Emergency Medicine
101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868
Orange County (714) 456-5239
DEMI TRAN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868
Orange County (171) 456-6693
DR. ISABEL CARLTON CLARK M.D.
Surgery (Trauma Surgery)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7890
DYLAN LUKATO
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Orange County (415) 218-8041

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 Nolan Ung's NPI number?

The NPI number for Nolan Ung is 1861989766. It was assigned to this individual provider in the NPPES registry on April 16, 2018.

Where is Nolan Ung located?

Nolan Ung practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-5770.

What is Nolan Ung's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Nolan Ung enrolled in Medicare?

Yes. Nolan Ung is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Nolan Ung's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nolan Ung reassigns Medicare benefits to Nolan R Ung MD Inc (La Habra Heights, 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 Nolan Ung'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 Nolan Ung was last updated on May 26, 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.