DIANA DOAN-NGUYEN
NPI 1225792369
Nurse Practitioner - Family in Orange, CA

NPI Status: Active since October 25, 2021

Contact Information

101 THE CITY DR S
ORANGE, CA
ZIP 92868
Phone: (714) 456-5705

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  • Individual
  • Female
  • Years of Experience 5
  • Nurse Practitioner
  • Family
  • Accepts Medicare Approved Payment
  • PECOS Enrolled

About DIANA DOAN-NGUYEN

This page provides the complete NPI Profile along with additional information for Diana Doan-nguyen, a provider established in Orange, California with a medical specialization in Nurse Practitioner, focusing in family and more than 5 years of experience. The healthcare provider is registered in the NPI registry with number 1225792369 assigned on October 2021. The practitioner's primary taxonomy code is 363LF0000X with license number 95017996 (CA). The provider is registered as an individual and her NPI record was last updated April 2026.

NPI
1225792369
Provider Name
DIANA DOAN-NGUYEN
Gender
Female
Entity Type
Individual
Location Address
101 THE CITY DR S ORANGE, CA 92868
Location Phone
(714) 456-5705
Mailing Address
1150 BAKER ST COSTA MESA, CA 92626
Medical School Name
OTHER
Graduation Year
2021
Is Sole Proprietor?
Yes
Enumeration Date
10-25-2021
Last Update Date
04-03-2026
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A nurse practitioner (NP) like Diana Doan-nguyen is an experienced registered nurse with a master’s or doctoral degree and advanced clinical training. Nurse practitioners can work in many different specialties including primary care, pediatrics, cardiology, emergency, women’s health, oncology or geriatrics. Nurse practitioners provide services like physical exams, order laboratory tests, manage diseases, write prescriptions, etc.

Location Map

Secondary Locations

  • 1150 Baker St
    Costa Mesa, CA 92626
  • 4699 Jamboree Rd
    Newport Beach, CA 92660
    (949) 557-0951

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

Nurse Practitioner Family

Taxonomy Code
363LF0000X
Type
Physician Assistants & Advanced Practice Nursing Providers
License No.
95017996
License State
CA

Medicare Participation & PECOS Enrollment Status

Diana Doan-nguyen 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.

Diana Doan-nguyen 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: 6507258431

    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: I20220126001227

    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.

Adm sarscov2 50mcg/0.25mlbst

This procedure involves administering a dose of a SARS-CoV-2 vaccine. The specific dosage is 50 micrograms in a 0.25 milliliter booster shot. This vaccine helps your body build immunity against the COVID-19 virus. It's a key part of global efforts to control the pandemic.

This service was performed 21 times for 21 patients

Detection test by immunoassay technique for severe acute respiratory syndrome coronavirus

An immunoassay test for severe acute respiratory syndrome coronavirus is a diagnostic tool. It uses your body's immune response to detect the presence of the virus. It involves taking a sample, usually from your nose or throat, which is then analyzed in a lab for signs of the virus.

This service was performed 46 times for 46 patients

Established patient office or other outpatient visit, 10-19 minutes

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

This service was performed 21 times for 21 patients

New patient office or other outpatient visit, 15-29 minutes

This service involves an initial visit to the doctor's office or other outpatient setting. It typically lasts between 15-29 minutes. The doctor will review your medical history, conduct a physical examination, and discuss your health concerns. It's a chance to establish your health baseline and address any immediate medical issues.

This service was performed 25 times for 25 patients

Physician Visit Costs



The typical physician office visit costs for Medicare beneficiaries in this area are: $24.09 for a new patient copayment and $27.49 for an established patient copayment.

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 92868 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99203

  • Average New Patient Price $96.36
  • Minimum New Patient Price $62.96
  • Maximum New Patient Price $187.6
  • Average New Patient Copayment $24.09
  • Minimum New Patient Copayment $15.74
  • Maximum New Patient Copayment $46.9

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99214

  • Average Established Patient Price $109.96
  • Minimum Established Patient Price $20.84
  • Maximum Established Patient Price $153.61
  • Average Established Patient Copayment $27.49
  • Minimum Established Patient Copayment $5.21
  • Maximum Established Patient Copayment $38.4

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Reviews for DIANA DOAN-NGUYEN

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NPI 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 1225792369, we treat the final digit (9) 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 61. The final step is to find the difference between that total and the next multiple of ten (70 - 61 = 9).

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
2
Unchanged
Pos 3
2
Doubled → 4
Pos 4
5
Unchanged
Pos 5
7
Doubled → 14 → 1 + 4
Pos 6
9
Unchanged
Pos 7
2
Doubled → 4
Pos 8
3
Unchanged
Pos 9
6
Doubled → 12 → 1 + 2
Check
9
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 2 → 4 7 → 14 → 5 2 → 4 6 → 12 → 3

Step 2: Add all digits plus the NPI constant

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

2 + 2 + 4 + 5 + 1 + 4 + 9 + 4 + 3 + 1 + 2 + 24 = 61

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

The next multiple of ten after 61 is 70. The difference is the calculated check digit.

70 - 61 = 9
This NPI is valid
The calculated check digit is 9, which matches the last digit of 1225792369.

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)
101 THE CITY DR S
ORANGE, CA 92868
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Genetic Counselor, MS
101 THE CITY DR S, DEPARTMENT OF PEDIATRICS
ORANGE, CA 92868
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 1225792369, enumerated as an "individual" on October 25, 2021.

The provider is located at 101 THE CITY DR S ORANGE, CA 92868 and the phone number is (714) 456-5705.

Nurse Practitioner with taxonomy code 363LF0000X and a focus in Family.