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2026 NPPES data Hematology & Oncology Physician NPI 1861463275 M.D.
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Donald Wender, M.D.

Hematology & Oncology Physician in Sioux City, Iowa.

This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,530 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
2K
Medicare Part D claims · 411 beneficiaries · Hematology & Oncology Physician avg: 885
MIPS score
99.5/100
▲ 16 pts above national avg 83.5 · Exceptional
Industry payments
$3.0K
160 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

Donald Wender, M.D. reported a CMS MIPS final score of 99.5/100 - above the 83.5 national average - and filed 2,187 Medicare Part D claims in 2024.

99.5/100
MIPS score · +16 vs avg
2K
Part D claims, 2024
Likely
board-certified (heuristic)
≥91st
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 Donald Wender, 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 1861463275), first enumerated 02/01/2006.

    Source: CMS NPPES

  • Reported

    Medicare Part D participation

    Filed 2,187 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 99.5/100 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

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

    Source: CMS Care Compare

  • Reported

    Industry payment transparency

    $3.0K in reported industry payments (160 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 1861463275 · Hematology & Oncology Physician

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

  • NPI-10 1861463275
  • ENUM-LEGACY 2006
  • TAX-MID 12K Hematology &
  • MIPS-ELITE 99.5/100
  • RX-MID 2,187
  • BOOK-THIN 71 in Iowa
  • PHOTO-FINISH Jeanine Werner, M.D. · ±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

Donald Wender, 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.

100 ≥ 91st percentile 91% 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 Donald Wender, 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, Donald Wender, M.D. writes more Part D claims than 93% of them and scores higher on MIPS quality than 90% - 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: 70 · MIPS quality, percentile: 7Point, Part D claim volume, percentile in specialty: 98 · MIPS quality, percentile: 62Point, Part D claim volume, percentile in specialty: 47 · MIPS quality, percentile: 38Point, Part D claim volume, percentile in specialty: 38 · MIPS quality, percentile: 77Point, 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: 55 · MIPS quality, percentile: 78Point, Part D claim volume, percentile in specialty: 25 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 82 · MIPS quality, percentile: 72Point, 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: 73Point, Part D claim volume, percentile in specialty: 63 · MIPS quality, percentile: 2Point, Part D claim volume, percentile in specialty: 75 · MIPS quality, percentile: 32Point, Part D claim volume, percentile in specialty: 62 · 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: 83 · MIPS quality, percentile: 0Point, Part D claim volume, percentile in specialty: 52 · MIPS quality, percentile: 82Point, Part D claim volume, percentile in specialty: 87 · MIPS quality, percentile: 35Point, Part D claim volume, percentile in specialty: 57 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 23 · MIPS quality, percentile: 37Point, Part D claim volume, percentile in specialty: 78 · 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: 70Point, Part D claim volume, percentile in specialty: 30 · MIPS quality, percentile: 80Point, Part D claim volume, percentile in specialty: 27 · MIPS quality, percentile: 85Point, Part D claim volume, percentile in specialty: 0 · MIPS quality, percentile: 65Point, Part D claim volume, percentile in specialty: 80 · MIPS quality, percentile: 13Point, Part D claim volume, percentile in specialty: 28 · MIPS quality, percentile: 3Point, Part D claim volume, percentile in specialty: 67 · MIPS quality, percentile: 75Point, Part D claim volume, percentile in specialty: 73 · MIPS quality, percentile: 52Point, Part D claim volume, percentile in specialty: 53 · MIPS quality, percentile: 15Point, Part D claim volume, percentile in specialty: 90 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 77 · 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: 68Point, 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: 72 · 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: 83Point, Part D claim volume, percentile in specialty: 65 · 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: 60 · MIPS quality, percentile: 63Point, Part D claim volume, percentile in specialty: 50 · MIPS quality, percentile: 60Point, Part D claim volume, percentile in specialty: 12 · MIPS quality, percentile: 25Point, Part D claim volume, percentile in specialty: 58 · MIPS quality, percentile: 92Point, Part D claim volume, percentile in specialty: 68 · MIPS quality, percentile: 67Donald Wender, M.D., Part D claim volume, percentile in specialty: 93 · MIPS quality, percentile: 90
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 Donald Wender, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.

✓
Board certification likely (heuristic, not verified)

Donald Wender, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 2 hospital affiliations - 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 Donald Wender, M.D.?

High performer (top quartile)

NPI registry status

Active

Issued 02/01/2006

NPI 1861463275

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,530 US NPIs in this specialty

Medicare Part D claims

2,187 147% vs specialty avg

2024 prescription claims

Specialty avg: 885

MIPS final score

99.5/100 16 pts vs avg

Exceptional band

vs 83.5 national avg

Specialty distribution in Iowa

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

Iowa providers
Pharmacist6.5%Physical Therapist5.4%Mental Health Counselor5%Family Medicine Physician4.7%Clinical Social Worker4.2%Chiropractor4.1%Hematology & Oncology Physic…0.1%
Largest specialties in Iowa (% of in-state providers)

Medicare quality performance, MIPS

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

High performer (top quartile)
MIPS Final Score
99.5/100
vs 83.5 national avg · 2023 performance year
0%100%National avg84%99%
MIPS final score (Hematology & Oncology Physician) - 99.5/100 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

230 NEBRASKA ST
Sioux City, IA 51101
(712) 252-0088

Provider Details

NPI 1861463275
Specialty Hematology & Oncology Physician
Credentials M.D.
Gender Male
NPI Issued 02/01/2006

CMS Quality Score (MIPS)

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

99.5336
Final Score
Measured-score avg: 83.5
94.5803
Quality
100
Promoting Interoperability

Reporting: Individual

Hospital and facility affiliations

Facilities where Donald Wender, 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.

Northwest Iowa Hospital Corporation
Sioux City, IA
Siouxland Regional Cancer Center
Sioux City, IA

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 Donald Wender, M.D.. Source: openpaymentsdata.cms.gov.

Total received

$3.0K

Largest payer

Janssen Biotech, 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.

Medicare Part D Prescribing Data

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

2,187
Total Claims
$6.4M
Total Drug Cost
411
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,790.967
Total Day Supply
75,923
Generic Drug Cost
$609K
Opioid Claims
105 (4.8% rate)
Antibiotic Claims
64

Patient Demographics

Average Patient Age
74.2 years
Avg HCC Risk Score
2.08
Gender Split
62% female / 38% male
Age Distribution
<65: 34, 65-74: 176, 75-84: 154, 85+: 47

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.

What Donald Wender, M.D. prescribes most

Top Medicare Part D drugs by claim count, 2024

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2024
Drug Claims
Anastrozole
 304
Letrozole
 154
Hydroxyurea
 153
Dexamethasone
 108
Tamoxifen Citrate
 80
Gabapentin
 71
Acyclovir
 70
Revlimid
Lenalidomide
66
Ondansetron Hcl
 64
Prednisone
 63

* 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 IA → All providers in Iowa → Compare specialties →

Hematology & Oncology Physician Overview

How Donald Wender, M.D. fits within the Hematology & Oncology Physician landscape nationally.

11,530
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
885
Avg Claims per Provider

Donald Wender, M.D.'s 2,187 claims are above the specialty average of 885.

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

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

Similar MIPS final score

Nearest same-specialty clinicians by CMS MIPS final score (99.5 here).

Elizabeth Delgiacco 99.5 VI Jeanine Werner 99.5 MD William Jonas 99.6 GA Sudhir Manda 99.6 AZ

Same NPPES enumeration year (2006)

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

William Ferri Beaver, PA Raghu Nandan Lakewood, CA John Leighton Philadelphia, PA Daniele Montgomery St Augustine, FL

Nearby Hematology & Oncology Physician Providers in Iowa

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

One of 71 Hematology & Oncology Physician providers enrolled in Iowa, 5 are shown here.

Dr. Anoop Aggarwal
M.D.
Clinton, IA
Dr. Saramma Alexander
MD
Des Moines, IA
Dr. Kartik Anand
MD
West Des Moines, IA
Dr. Robert Behrens
MD
Des Moines, IA
Loren Brown
Des Moines, IA

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

Frequently Asked Questions

What is Donald Wender, M.D.'s specialty? ▼
Donald Wender, M.D. specializes in Hematology & Oncology Physician and practices in Sioux City, Iowa. Credentials: M.D..
How much does Donald Wender, M.D. prescribe under Medicare Part D? ▼
In 2024, Donald Wender, M.D. wrote 2,187 Medicare Part D claims totaling $6.4M in drug costs for 411 beneficiaries.
What is Donald Wender, M.D.'s Medicare quality score? ▼
Donald Wender, M.D. has a CMS MIPS Final Score of 99.5/100 (Quality: 94.6). 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 Donald Wender, M.D. located? ▼
Donald Wender, M.D. is located at 230 NEBRASKA ST, Sioux City, IA, 51101. Phone: (712) 252-0088.
What is Donald Wender, M.D.'s NPI number? ▼
Donald Wender, M.D.'s National Provider Identifier (NPI) is 1861463275, issued on 02/01/2006.
Does Donald Wender, M.D. prescribe opioids? ▼
Yes, Donald Wender, M.D. had 105 opioid claims in 2024 with an opioid prescribing rate of 4.8%.
How many Hematology & Oncology Physician providers are there in the US? ▼
There are 11,530 Hematology & Oncology Physician providers across 54 states in the US. The average Hematology & Oncology Physician provider writes 885 Medicare Part D claims per year.
What drugs does Donald Wender, M.D. prescribe most often? ▼
Based on 2024 Medicare Part D data, Donald Wender, M.D.'s most frequently prescribed drugs include Anastrozole, Letrozole, Hydroxyurea. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Donald Wender, M.D. accept Medicare? ▼
Donald Wender, M.D. appears in CMS Medicare data with 2,187 Part D claims and 411 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Donald Wender, M.D.'s credentials? ▼
Donald Wender, M.D.'s NPI is 1861463275 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 (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.