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2026 NPPES data Hematology & Oncology Physician NPI 1144548652 M.D.
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Victor Chiu, M.D.

Hematology & Oncology Physician in Mesa, Arizona.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,232 in Hematology & Oncology Physician, 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
835
Medicare Part D claims · 182 beneficiaries · Hematology & Oncology Physician avg: 847
MIPS score
93.6/100
▲ 10 pts above national avg 83.5 · Exceptional
Industry payments
$3.3K
91 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

Victor Chiu, M.D. reported a CMS MIPS final score of 93.6/100 - above the 83.5 national average - and filed 835 Medicare Part D claims in 2023.

93.6/100
MIPS score · +10 vs avg
835
Part D claims, 2023
Likely
board-certified (heuristic)
≥69th
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 Victor Chiu, M.D.

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 1144548652), first enumerated 05/07/2010.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 835 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 93.6/100 in the Quality Payment Program — a federal quality measure, not a patient review.

    Source: CMS Quality Payment Program

  • Reported

    Board certification signal

    Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.

    Source: NUCC taxonomy + CMS participation heuristic

  • Reported

    Hospital affiliations

    1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.

    Source: CMS Care Compare

  • Reported

    Industry payment transparency

    $3.3K in reported industry payments (91 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.

    Source: CMS Open Payments

  • 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 1144548652 · Hematology & Oncology Physician

NPI-10 · ENUM-MID · TAX-MID · MIPS-ELITE · RX-LIGHT · BOOK-THIN · PHOTO-FINISH

  • NPI-10 1144548652
  • ENUM-MID 2010
  • TAX-MID 11K Hematology &
  • MIPS-ELITE 93.6/100
  • RX-LIGHT 835
  • BOOK-THIN 230 in Arizona
  • PHOTO-FINISH Joshua Rifkind · ±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

Victor Chiu, M.D.'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.

94 ≥ 69th percentile 69% 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%). Below this entry. 80–90: 129,887 measured providers (29%). Below this entry. 90+: 189,403 measured providers (42%). This entry sits in this band. 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 Victor Chiu, M.D. sits

This provider among hematology & oncology physician peers

Across the 4,019 hematology & oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Victor Chiu, M.D. writes more Part D claims than 55% of them and scores higher on MIPS quality than 70% - placing this provider in the high-volume, high-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 quality0255075100024.148.372.496.6Part D claim volume, percentile in specialtyMIPS quality, percentilePoint, Part D claim volume, percentile in specialty: 72 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 22 · MIPS quality, percentile: 22Point, Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 17 · MIPS quality, percentile: 58Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 83 · MIPS quality, percentile: 73Point, Part D claim volume, percentile in specialty: 5 · MIPS quality, percentile: 23Point, Part D claim volume, percentile in specialty: 88 · MIPS quality, percentile: 33Point, Part D claim volume, percentile in specialty: 7 · MIPS quality, percentile: 55Point, Part D claim volume, percentile in specialty: 18 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 20 · MIPS quality, percentile: 28Point, Part D claim volume, percentile in specialty: 40 · MIPS quality, percentile: 8Point, Part D claim volume, percentile in specialty: 3 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 65 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 77 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 48 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 90Point, Part D claim volume, percentile in specialty: 43 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 85 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 83Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 45Point, Part D claim volume, percentile in specialty: 92 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 15 · MIPS quality, percentile: 72Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 87Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 67Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 77Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 78 · MIPS quality, percentile: 43Point, Part D claim volume, percentile in specialty: 13 · MIPS quality, percentile: 27Point, Part D claim volume, percentile in specialty: 33 · MIPS quality, percentile: 88Point, Part D claim volume, percentile in specialty: 42 · MIPS quality, percentile: 50Point, Part D claim volume, percentile in specialty: 95 · MIPS quality, percentile: 70Point, Part D claim volume, percentile in specialty: 10 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 2 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 37 · MIPS quality, percentile: 57Point, Part D claim volume, percentile in specialty: 32 · MIPS quality, percentile: 10Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 5Point, Part D claim volume, percentile in specialty: 8 · MIPS quality, percentile: 42Point, Part D claim volume, percentile in specialty: 100 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 18Point, Part D claim volume, percentile in specialty: 97 · MIPS quality, percentile: 17Point, Part D claim volume, percentile in specialty: 45 · MIPS quality, percentile: 30Point, Part D claim volume, percentile in specialty: 62 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 60 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 70 · MIPS quality, percentile: 68Victor Chiu, M.D., Part D claim volume, percentile in specialty: 55 · MIPS quality, percentile: 70
Part D claim volume vs MIPS quality, by specialty percentile

Each dot is one hematology & oncology physician peer from a representative sample of 60; the gold marker is Victor Chiu, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Victor Chiu, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about Victor Chiu, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 05/07/2010

NPI 1144548652

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,232 US NPIs in this specialty

Medicare Part D claims

835 1% vs specialty avg

2023 prescription claims

Specialty avg: 847

MIPS final score

93.6/100 10.1 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Arizona

How Hematology & Oncology Physician compares to other specialties among Arizona providers

Arizona providers
Pharmacist5.6%Behavior Technician5.6%Family Nurse Practitioner4.3%Physical Therapist4.2%Speech-Language Pathologist3.5%Student in an Organized Heal…3.5%Hematology & Oncology Physic…0.2%
Largest specialties in Arizona (% of in-state providers)

Medicare quality performance, MIPS

Victor Chiu, M.D.'s 2023 MIPS final score plotted against the Hematology & Oncology Physician national average

High performer (top quartile)
MIPS Final Score
93.6/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%93.6%
MIPS final score (Hematology & Oncology Physician) - 93.6/100 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

6111 E ARBOR AVE
Mesa, AZ 85206
(480) 981-1326

Provider Details

NPI 1144548652
Specialty Hematology & Oncology Physician
Credentials M.D.
Gender Male
NPI Issued 05/07/2010

CMS Quality Score (MIPS)

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

93.6162
Final Score
Measured-score avg: 83.5
97.6659
Quality
83
Promoting Interoperability

Reporting: subgroup

Hospital and facility affiliations

Facilities where Victor Chiu, M.D. 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.

Ironwood Physicians PC
Mesa, AZ

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

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 Victor Chiu, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$3.3K

Largest payer

AstraZeneca Pharmaceuticals LP

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.

Medicare Part D Prescribing Data

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

835
Total Claims
$1.2M
Total Drug Cost
182
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,137
Total Day Supply
28,820
Generic Drug Cost
$378K
Opioid Claims
55 (6.6% rate)
Antibiotic Claims
36

Patient Demographics

Average Patient Age
75.0 years
Avg HCC Risk Score
2.04
Gender Split
62% female / 38% male

Top Prescribed Drugs (Medicare Part D)

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

What Victor Chiu, M.D. 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
Anastrozole
 78
Eliquis
Apixaban
65
Ondansetron Odt
Ondansetron
52
Dexamethasone
 39
Prednisone
 37
Prochlorperazine Maleate
 35
Hydroxyurea
 34
Abiraterone Acetate
 28
Olanzapine
 23
Oxycodone Hcl
 22

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

More Hematology & Oncology Physician in AZ → All providers in Arizona → Compare specialties →

Hematology & Oncology Physician Overview

How Victor Chiu, M.D. fits within the Hematology & Oncology Physician landscape nationally.

11,232
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

Victor Chiu, M.D.'s 835 claims are below the specialty average of 847.

Nationwide Hematology & Oncology Physician peers with similar MIPS or enrollment year

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (93.6 here).

Joshua Rifkind 93.6 MS Nelson Kalil 93.7 MD Zachary Epstein-Peterson 93.5 NY Niamh Keegan 93.5 NY

Same NPPES enumeration year (2010)

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

Victoria Forte Brooklyn, NY Joanna Grabska Greenville, SC Zanhua Yi New York, NY Eric Wiedower Germantown, TN

Nearby Hematology & Oncology Physician Providers in Arizona

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

One of 230 Hematology & Oncology Physician providers enrolled in Arizona, 5 are shown here.

Dr. Ahmed Abdelaziz
M.D.
Tucson, AZ
Oluseyi Abidoye
Phoenix, AZ
Dr. Roberta Adams
M.D.
Scottsdale, AZ
Dr. Clarence Adoo
M.D.
Peoria, AZ
Dr. Yusuf Ahmad
M.D.
Oro Valley, AZ

Compare Hematology & Oncology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is Victor Chiu, M.D.'s specialty? ▼
Victor Chiu, M.D. specializes in Hematology & Oncology Physician and practices in Mesa, Arizona. Credentials: M.D..
How much does Victor Chiu, M.D. prescribe under Medicare Part D? ▼
In 2023, Victor Chiu, M.D. wrote 835 Medicare Part D claims totaling $1.2M in drug costs for 182 beneficiaries.
What is Victor Chiu, M.D.'s Medicare quality score? ▼
Victor Chiu, M.D. has a CMS MIPS Final Score of 93.6/100 (Quality: 97.7). 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 Victor Chiu, M.D. located? ▼
Victor Chiu, M.D. is located at 6111 E ARBOR AVE, Mesa, AZ, 85206. Phone: (480) 981-1326.
What is Victor Chiu, M.D.'s NPI number? ▼
Victor Chiu, M.D.'s National Provider Identifier (NPI) is 1144548652, issued on 05/07/2010.
Does Victor Chiu, M.D. prescribe opioids? ▼
Yes, Victor Chiu, M.D. had 55 opioid claims in 2023 with an opioid prescribing rate of 6.6%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,232 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 847 Medicare Part D claims per year.
What drugs does Victor Chiu, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Victor Chiu, M.D.'s most frequently prescribed drugs include Anastrozole, Eliquis, Ondansetron Odt. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Victor Chiu, M.D. accept Medicare? ▼
Victor Chiu, M.D. appears in CMS Medicare data with 835 Part D claims and 182 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Victor Chiu, M.D.'s credentials? ▼
Victor Chiu, M.D.'s NPI is 1144548652 with credentials M.D.. 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 (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

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 May 2026.