2026 NPPES data Nurse Practitioner NPI 1154332955 ARNP
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TRANG CHAU, ARNP

Nurse Practitioner in SEATTLE, Washington. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
76
Medicare Part D claims · 30 beneficiaries · Nurse Practitioner avg: 1K
Generic prescribing
84%
generic claims · 16% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.8101/100
▲ 1 pts above national avg 83.1 · [object Object]

What the federal data shows

TRANG CHAU, ARNP reported a CMS MIPS final score of 83.8101/100 — above the 83.1 national average — and filed 76 Medicare Part D claims in 2023.

83.8101/100
MIPS score · +1 vs avg
76
Part D claims, 2023
84%
generic prescribing

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.

TRANG CHAU, ARNP's MIPS score vs every scored U.S. clinician

CMS Merit-based Incentive Payment System (MIPS) final score, 2023 — the federal quality measure

84 42nd percentile higher than 42% of 477,587 scored providers

0–10: 8,684 scored providers (2%). Below this entry. 10–20: 3,008 scored providers (1%). Below this entry. 20–30: 3,069 scored providers (1%). Below this entry. 30–40: 2,746 scored providers (1%). Below this entry. 40–50: 2,928 scored providers (1%). Below this entry. 50–60: 5,882 scored providers (1%). Below this entry. 60–70: 13,906 scored providers (3%). Below this entry. 70–80: 118,074 scored providers (25%). Below this entry. 80–90: 129,887 scored providers (27%). This entry sits in this band. 90–100: 189,403 scored providers (40%). Above this entry. This provider 0 100 every MIPS-scored clinician, bucketed by value

Each bar is a band; taller bars hold more scored 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.

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

What does the federal data show about TRANG CHAU, ARNP?

Near national average

NPI registry status

Active

Issued 08/10/2006

NPI 1154332955

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

76 93% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

MIPS final score

83.8101/100 0.7101000000000113% pts

Above neutral band

vs 83.1 national avg

Specialty distribution in Washington

How Nurse Practitioner compares to other specialties among Washington providers

Washington providers

Nurse Practitioner share within Washington

1. Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Nurse Practitioner share within Washington

Medicare quality performance — MIPS

TRANG CHAU, ARNP's 2023 MIPS final score plotted against the Nurse Practitioner national average

Near national average
MIPS Final Score
83.8101/100
vs 83.1 national avg · 2023 performance year

MIPS final score (Nurse Practitioner) — 83.8101/100 vs national avg 83.1

0%100%National avg83%83.8%
MIPS final score (Nurse Practitioner) — 83.8101/100 vs national avg 83.1

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).

TRANG CHAU, ARNP appears in the CMS NPPES registry as a Nurse Practitioner provider holding ARNP credentials at 1100 9TH AVE, SEATTLE, WA, 98101, with a listed phone of (206) 223-2319. NPI 1154332955 was issued on 08/10/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAU most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

Medicare Part D records for calendar year 2023 show 76 prescription claims written by this provider, covering 30 Medicare beneficiaries and totaling roughly $8K in drug spend, split 16% brand-name and 84% generic by claim count. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 83.8101/100 for the 2023 performance year (Quality 74.2614), compared with the national average of 83.1.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline. Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist — always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.

Practice Address

1100 9TH AVE
SEATTLE, WA 98101

Provider Details

NPI 1154332955
Specialty Nurse Practitioner
Credentials ARNP
Gender Female
NPI Issued 08/10/2006

CMS Quality Score (MIPS)

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

83.8101
Final Score
Avg: 83.1
74.2614
Quality
80
Promoting Interoperability

Reporting: Alternative Payment Model

Hospital and facility affiliations

Facilities where TRANG CHAU, ARNP bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" — a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.

VIRGINIA MASON MEDICAL CENTER
★★★★★ 5/5
SEATTLE, WA
Acute Care Hospitals
CMS CCN: 500005

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

License & disciplinary context — Washington WMC 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 ~34K Washington medical licensees in 2023 — they are NOT specific to TRANG CHAU, ARNP. To verify TRANG CHAU, ARNP's current license status, search the WMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

88
Total board actions, Washington 2023
Across 85 cases
2.59
Actions per 1,000 licensees
Washington statewide rate
probation
Most common action type
31 cases

WMC 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 Washington disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Typical

TRANG CHAU, ARNP — brand share 16.0%
Specialty average (est.)

16% brand-name claims vs 84% generic, on 76 2023 Medicare Part D claims.

The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.

Medicare Part D Prescribing Data

CMS Medicare Part D prescriber-level data for calendar year 2023.

76
Total Claims
$8K
Total Drug Cost
30
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
97
Total Day Supply
2,459
Brand vs Generic
16% brand / 84% generic
Brand Drug Cost
$6K
Generic Drug Cost
$2K

Patient Demographics

Average Patient Age
70.9 years
Avg HCC Risk Score
1.84
Gender Split
63% female / 37% male

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What TRANG CHAU, ARNP prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Omeprazole
15
Pantoprazole Sodium
15
Ursodiol
14

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Nurse Practitioner Overview

How TRANG CHAU, ARNP fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

TRANG CHAU, ARNP's 76 claims are below the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Washington

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

Compare Nurse Practitioner nationally: see state-by-state distribution →

Frequently Asked Questions

What is TRANG CHAU, ARNP's specialty?
TRANG CHAU, ARNP specializes in Nurse Practitioner and practices in SEATTLE, Washington. Credentials: ARNP.
How much does TRANG CHAU, ARNP prescribe under Medicare Part D?
In 2023, TRANG CHAU, ARNP wrote 76 Medicare Part D claims totaling $8K in drug costs for 30 beneficiaries.
What is TRANG CHAU, ARNP's Medicare quality score?
TRANG CHAU, ARNP has a CMS MIPS Final Score of 83.8101/100 (Quality: 74.2614). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is TRANG CHAU, ARNP located?
TRANG CHAU, ARNP is located at 1100 9TH AVE, SEATTLE, WA, 98101. Phone: (206) 223-2319.
What is TRANG CHAU, ARNP's NPI number?
TRANG CHAU, ARNP's National Provider Identifier (NPI) is 1154332955, issued on 08/10/2006.
Does TRANG CHAU, ARNP prescribe more brand-name or generic drugs?
TRANG CHAU, ARNP's prescribing is 16% brand-name and 84% generic drugs by claim count, with $6K in brand drug costs.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does TRANG CHAU, ARNP prescribe most often?
Based on 2023 Medicare Part D data, TRANG CHAU, ARNP's most frequently prescribed drugs include Omeprazole, Pantoprazole Sodium, Ursodiol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does TRANG CHAU, ARNP accept Medicare?
TRANG CHAU, ARNP appears in CMS Medicare data with 76 Part D claims and 30 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify TRANG CHAU, ARNP's credentials?
TRANG CHAU, ARNP's NPI is 1154332955 with credentials ARNP. 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

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 (2023). 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 April 2026 (NPPES) / 2023 (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