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2026 NPPES data Psychiatric/Mental Health Nurse Practitioner NPI 1841966777 NP
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Diana Nguyen, NP

Psychiatric/Mental Health Nurse Practitioner in Costa Mesa, California.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 44,928 in Psychiatric/Mental Health Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.

Federal data, no proprietary rating. We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
12
Medicare Part D claims · 11 beneficiaries · Psychiatric/Mental Health Nurse Practitioner avg: 895
MIPS score
78.7/100
▼ 5 pts below national avg 83.5 · Above neutral
Industry payments
$305.49
4 payments · CMS Open Payments (Sunshine Act)
Verify NPI on CMS Methodology
Compiled from official public sources by the editorial process.

What the federal data shows

Diana Nguyen, NP reported a CMS MIPS final score of 78.7/100 - below the 83.5 national average - and filed 12 Medicare Part D claims in 2024.

78.7/100
MIPS score · -5 vs avg
12
Part D claims, 2024
$305.49
industry payments (Sunshine Act)
≥23rd
pct among measured MIPS (lower-bound band)

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.

Federal trust snapshot

What official records show about Diana Nguyen, NP

Federal records show an active NPI with both Medicare prescribing volume and a measured CMS quality score — objective registry data, not patient reviews.

  • Verified

    NPI registry status

    Active listing in the CMS National Provider Identifier Registry (NPI 1841966777), first enumerated 08/20/2021.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 12 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.

    Source: CMS Part D Prescriber PUF

  • Reported

    CMS quality reporting (MIPS)

    Reported a CMS MIPS final score of 78.7/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Industry payment transparency

    $305.49 in reported industry payments (4 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.

    Source: CMS Open Payments

  • State context

    State board disciplinary context

    California statewide board action statistics are published annually — these figures describe aggregate state activity, not Diana Nguyen, NP's individual license status. Verify directly with the state medical board.

    Source: MBC annual report 2023

  • Not in federal data

    Individual sanction lookup

    PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.

    Source: State medical board / FSMB

This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.

CMS NPPES provider registry desk

NPI 1841966777 · Psychiatric/Mental Health Nurse Practitioner

NPI-10 · ENUM-RECENT · TAX-MID · MIPS-BELOW · RX-TRACE · BOOK-LIGHT · PHOTO-FINISH

  • NPI-10 1841966777
  • ENUM-RECENT 2021
  • TAX-MID 45K Psychiatric/Mental Health
  • MIPS-BELOW 78.7/100
  • RX-TRACE 12
  • BOOK-LIGHT 3,076 in California
  • PHOTO-FINISH Amy Lukacz · ±0.0

MIPS final-score neighbourhood

Same-specialty nationwide peers by CMS final score, not geographic proximity

MIPS pts

What this shows Nearest measured MIPS peers for this NUCC specialty (2023 performance year).

Source CMS Quality Payment Program (MIPS) As of 2023

Diana Nguyen, NP's MIPS score vs every measured U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.

79 ≥ 23rd percentile 23% of 454,083 measured providers are in lower value bands

0–10: 8,684 measured providers (2%). Below this entry. 10–20: 3,008 measured providers (1%). Below this entry. 20–30: 3,069 measured providers (1%). Below this entry. 30–40: 2,746 measured providers (1%). Below this entry. 40–50: 2,928 measured providers (1%). Below this entry. 50–60: 5,882 measured providers (1%). Below this entry. 60–70: 13,906 measured providers (3%). Below this entry. 70–80: 94,570 measured providers (21%). This entry sits in this band. 80–90: 129,887 measured providers (29%). Above this entry. 90+: 189,403 measured providers (42%). Above this entry. This provider 0 100 every measured MIPS clinician, bucketed by value

Each bar is a band; taller bars hold more measured providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

The percentile is a conservative whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.

Source CMS Merit-based Incentive Payment System (MIPS) · 2023

Where Diana Nguyen, NP sits

This provider among psychiatric/mental health nurse practitioner peers

Across the 1,808 psychiatric/mental health nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Diana Nguyen, NP writes more Part D claims than 1% of them and scores higher on MIPS quality than 20% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.

Lower volume · High qualityHigh volume · High qualityLower volume · Lower qualityHigh volume · Lower quality02550751000255075100Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 12Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 40Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 48Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 97Point, Part D claim volume, percentile in specialty: 35 · MIPS quality, percentile: 68Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 95Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 98Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 53Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 93Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 47Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 33Diana Nguyen, NP, Part D claim volume, percentile in specialty: 1 · MIPS quality, percentile: 20
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one psychiatric/mental health nurse practitioner peer from a representative sample of 60; the gold marker is Diana Nguyen, NP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

What does the federal data show about Diana Nguyen, NP?

Near national average

NPI registry status

Active

Issued 08/20/2021

NPI 1841966777

Primary specialty

Psychiatric/Mental Health Nurse Practitioner

Mid-sized

44,928 US NPIs in this specialty

Medicare Part D claims

12 99% vs specialty avg

2024 prescription claims

Specialty avg: 895

MIPS final score

78.7/100 4.8 pts vs avg

Above neutral band

vs 83.5 national avg

Specialty distribution in California

How Psychiatric/Mental Health Nurse Practitioner compares to other specialties among California providers

California providers
Behavior Technician17.9%Marriage & Family Therapist5.4%Student in an Organized Heal…5.1%Mental Health Counselor3.7%Pharmacist3.4%Clinical Social Worker3.1%Psychiatric/Mental Health Nu…0.3%
Largest specialties in California (% of in-state providers)

Medicare quality performance, MIPS

Diana Nguyen, NP's 2023 MIPS final score plotted against the Psychiatric/Mental Health Nurse Practitioner national average

Near national average
MIPS Final Score
78.7/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%78.7%
MIPS final score (Psychiatric/Mental Health Nurse Practitioner) - 78.7/100 vs national avg 83.5
How MIPS and board certification work

The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.

Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).

Practice Address

1150 BAKER ST
Costa Mesa, CA 92626
(714) 662-7517

Provider Details

NPI 1841966777
Specialty Psychiatric/Mental Health Nurse Practitioner
Credentials NP
Gender Female
NPI Issued 08/20/2021

CMS Quality Score (MIPS)

Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.

78.6559
Final Score
Measured-score avg: 83.5
66.952
Quality
89.4411
Cost

Reporting: Group practice

Industry payments received (2024) - CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Diana Nguyen, NP. Source: openpaymentsdata.cms.gov.

Total received

$305

Largest payer

Teva Pharmaceuticals USA, Inc.

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context - California MBC 2023 annual report

Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~150K California medical licensees in 2023 - they are NOT specific to Diana Nguyen, NP. To verify Diana Nguyen, NP's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases

MBC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2024.

12
Total Claims
$103
Total Drug Cost
11
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
14
Total Day Supply
155

Patient Demographics

Average Patient Age
71.4 years
Avg HCC Risk Score
0.87
More Psychiatric/Mental Health Nurse Practitioner in CA → All providers in California → Compare specialties →

Psychiatric/Mental Health Nurse Practitioner Overview

How Diana Nguyen, NP fits within the Psychiatric/Mental Health Nurse Practitioner landscape nationally.

44,928
Psychiatric/Mental Health Nurse Practitioner Providers in US
54
States with Psychiatric/Mental Health Nurse Practitioner
895
Avg Claims per Provider

Diana Nguyen, NP's 12 claims are below the specialty average of 895.

Nationwide Psychiatric/Mental Health Nurse Practitioner peers with similar MIPS or enrollment year

Two federal-record peer sets for Nguyen, both outside California so the neighborhoods are not geographic containment.

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (78.7 here).

Kevin Hannon 78.6 NH Amy Lukacz 78.7 NY Benedetta Melnick 78.7 NY Damaris Deutsch 78.8 OK

Same NPPES enumeration year (2021)

Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.

Rio Peterson New Meadows, ID Amanda Flood Mandeville, LA Michelle Pemberton Gilbert, AZ Mary Tobey Lakewood, WA

Nearby Psychiatric/Mental Health Nurse Practitioner Providers in California

Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Nguyen.

One of 3,076 Psychiatric/Mental Health Nurse Practitioner providers enrolled in California, 5 are shown here.

Cristina Aamot
NP
Santa Ana, CA
Calista Abaekobe
NP
Culver City, CA
Jane Abanes
NP
San Francisco, CA
Pamela Joy Abao
NP
Valencia, CA
Kazeem Abass
Los Angeles, CA

Compare Psychiatric/Mental Health Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is Diana Nguyen, NP's specialty? ▼
Diana Nguyen, NP specializes in Psychiatric/Mental Health Nurse Practitioner and practices in Costa Mesa, California. Credentials: NP.
How much does Diana Nguyen, NP prescribe under Medicare Part D? ▼
In 2024, Diana Nguyen, NP wrote 12 Medicare Part D claims totaling $103 in drug costs for 11 beneficiaries.
What is Diana Nguyen, NP's Medicare quality score? ▼
Diana Nguyen, NP has a CMS MIPS Final Score of 78.7/100 (Quality: 67, Cost: 89.4). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Diana Nguyen, NP located? ▼
Diana Nguyen, NP is located at 1150 BAKER ST, Costa Mesa, CA, 92626. Phone: (714) 662-7517.
What is Diana Nguyen, NP's NPI number? ▼
Diana Nguyen, NP's National Provider Identifier (NPI) is 1841966777, issued on 08/20/2021.
How many Psychiatric/Mental Health Nurse Practitioner providers are there in the US? ▼
There are 44,928 Psychiatric/Mental Health Nurse Practitioner providers across 54 states in the US. The average Psychiatric/Mental Health Nurse Practitioner provider writes 895 Medicare Part D claims per year.
Does Diana Nguyen, NP accept Medicare? ▼
Diana Nguyen, NP appears in CMS Medicare data with 12 Part D claims and 11 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Diana Nguyen, NP's credentials? ▼
Diana Nguyen, NP's NPI is 1841966777 with credentials NP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.

Data Sources

View source datasets and methodology notes
Provider Directory
CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
Specialty Classification
NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
Prescribing Data
CMS Medicare Part D Prescriber Public Use File (2024). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
Quality Performance
CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
Limitations
Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.

See our complete data methodology for details on how we collect and process government data.

Data as of August 2026 (NPPES) / 2024 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).

Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology

Compiled from official public sources by the editorial process.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of August 2026.