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

Active since April 16, 2018PECOS EnrolledAccepts Medicare Assignment
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: July 19, 2026.

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

  • Individual
  • Male
  • Years of Experience 9
  • Psychiatry & Neurology
  • Child & Adolescent Psychiatry
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About NOLAN UNG

This page provides the complete NPI Profile along with additional information for Nolan Ung, a provider established in Orange, California with a medical specialization in Psychiatry & Neurology, focusing in child & adolescent psychiatry and more than 9 years of experience. He graduated from University Of California, Geffen School Of Medicine in 2018. The healthcare provider is registered in the NPI registry with number 1861989766 assigned on April 2018. The practitioner's primary taxonomy code is 2084P0804X with license number A163403 (CA). The provider is registered as an individual and his NPI record was last updated 4 years ago.

NPI
1861989766
Provider Name
NOLAN RYAN UNG
Gender
Male
Entity Type
Individual
Location Address
101 THE CITY DR S ORANGE, CA 92868
Location Phone
(714) 456-5770
Mailing Address
101 THE CITY DR S ORANGE, CA 92868
Mailing Phone
(714) 456-5770
Medical School Name
UNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduation Year
2018
Is Sole Proprietor?
Yes
Enumeration Date
04-16-2018
Last Update Date
05-26-2022
Code Navigator

Location Map

Secondary Locations

  • 1000 W Carson St
    Torrance, CA 90502
    (310) 222-3151

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Psychiatry & Neurology Child & Adolescent Psychiatry

Taxonomy Code
2084P0804X
Type
Allopathic & Osteopathic Physicians
License No.
A163403
License State
CA
Taxonomy Description
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.

Secondary Taxonomies

The provider has reported to the NPI enumerator additional taxonomy codes. Multiple taxonomy codes may represent subspecialties or other areas of specialization the provider maybe licensed to practice.

No. Taxonomy Code Type Classification /
Specialization
License No. (State)
1174400000XOther Service Providers

Specialist

 

Medicare Participation & PECOS Enrollment Status

Nolan Ung is registered with Medicare and accepts claims assignment, this means the provider accepts the approved amount for the cost of rendered services as full payment. Participating providers may not charge beneficiaries more than the approved amount for their services. Please keep in mind that beneficiaries still have to pay a coinsurance or copayment amount for a visit or service.

Nolan Ung is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 8022454867

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20240314002924

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Yes

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Residence visit for established patient with moderate level of medical decision making, per day, if using time, at least 40 minutes

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.

This service was performed 100 times for 53 patients

Residence visit for new patient with moderate level of medical decision making, per day, if using time, at least 60 minutes

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.

This service was performed 60 times for 60 patients

Reviews for NOLAN RYAN UNG

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NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1861989766, we treat the final digit (6) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 74. The final step is to find the difference between that total and the next multiple of ten (80 - 74 = 6).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1
1
Doubled → 2
Pos 2
8
Unchanged
Pos 3
6
Doubled → 12 → 1 + 2
Pos 4
1
Unchanged
Pos 5
9
Doubled → 18 → 1 + 8
Pos 6
8
Unchanged
Pos 7
9
Doubled → 18 → 1 + 8
Pos 8
7
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
6
Target digit
Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 6 → 12 → 3 9 → 18 → 9 9 → 18 → 9 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 8 + 1 + 2 + 1 + 1 + 8 + 8 + 1 + 8 + 7 + 1 + 2 + 24 = 74

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 74 is 80. The difference is the calculated check digit.

80 - 74 = 6
This NPI is valid
The calculated check digit is 6, which matches the last digit of 1861989766.

Other Providers at the Same Location


The following 19 providers are registered at the same or a nearby location.

Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
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Internal Medicine (Rheumatology)
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Genetic Counselor, MS
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Urology
101 THE CITY DR S
ORANGE, CA 92868
Nurse Anesthetist, Certified Registered
101 THE CITY DR S
ORANGE, CA 92868
Surgery
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics (Pediatric Nephrology)
101 THE CITY DR S, BLDG. 56, SUITE 600
ORANGE, CA 92868
Otolaryngology (Otology & Neurotology)
101 THE CITY DR S, BLDG 56, SUITE 500 RTE 81
ORANGE, CA 92868
Anesthesiology
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics (Neurodevelopmental Disabilities)
101 THE CITY DR S
ORANGE, CA 92868
Psychiatry & Neurology (Neurology)
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine
101 THE CITY DR S
ORANGE, CA 92868
Urology
101 THE CITY DR S
ORANGE, CA 92868
Pediatrics
101 THE CITY DR S
ORANGE, CA 92868
Anesthesiology
101 THE CITY DR S
ORANGE, CA 92868
Nurse Anesthetist, Certified Registered
101 THE CITY DR S
ORANGE, CA 92868
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine (Hematology & Oncology)
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine (Infectious Disease)
101 THE CITY DR S
ORANGE, CA 92868

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1861989766, enumerated as an "individual" on April 16, 2018.

The provider is located at 101 THE CITY DR S ORANGE, CA 92868 and the phone number is (714) 456-5770.

Psychiatry & Neurology with taxonomy code 2084P0804X and a focus in Child & Adolescent Psychiatry.