2026 NPPES data Hematology & Oncology Physician NPI 1548371180 MD
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Xiaowen Wang, MD

Hematology & Oncology Physician in Everett, Washington. This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers — including 11,215 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
1K
Medicare Part D claims · 287 beneficiaries · Hematology & Oncology Physician avg: 847
Industry payments
$5.5K
14 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Xiaowen Wang, MD filed 1,116 Medicare Part D claims in 2023 as a Hematology & Oncology Physician in Everett, Washington.

1K
Part D claims, 2023
Likely
board-certified (heuristic)

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.

Xiaowen Wang, MD's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

1,116 Top 23% higher than 77% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). This entry sits in this band. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. 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 Medicare Part D Prescriber Public Use File · 2023

Board certification likely (heuristic — not verified)

Xiaowen Wang, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Xiaowen Wang, MD?

Quality data not reported

NPI registry status

Active

Issued 08/31/2006

NPI 1548371180

Primary specialty

Hematology & Oncology Physician

Mid-sized

11,215 US NPIs in this specialty

Medicare Part D claims

1,116 32% vs specialty avg

2023 prescription claims

Specialty avg: 847

Specialty distribution in Washington

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

Washington providers

Largest specialties in Washington (% of in-state providers)

Mental Health Counselor — 8.6%Mental Health Counselor8.6%Massage Therapist — 6.5%Massage Therapist6.5%Counselor — 5.7%Counselor5.7%Behavior Technician — 4.5%Behavior Technician4.5%Pharmacist — 4%Pharmacist4%Physical Therapist — 3.6%Physical Therapist3.6%Hematology & Oncology Physician — 0.2%Hematology & Oncology Physician0.2%
Largest specialties in Washington (% of in-state providers)

Specialty board-certification context

Estimated specialty board-certified rate — Hematology & Oncology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Hematology & Oncology Physician ABMS/AOA estimate

Est. board-certified rate (Hematology & Oncology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Hematology & Oncology Physician) — ABMS / AOA estimate

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).

Xiaowen Wang, MD appears in the CMS NPPES registry as a Hematology & Oncology Physician provider holding MD credentials at 1717 13TH ST, Everett, WA, 98201, with a listed phone of (425) 297-5500. NPI 1548371180 was issued on 08/31/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Wang 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 1,116 prescription claims written by this provider, covering 287 Medicare beneficiaries and totaling roughly $2.5 million in drug spend, with an opioid prescribing rate of 5.6%. 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.

Hematology & Oncology Physician is a mid-sized specialty nationwide, with 11,215 enrolled providers across 54 states and an average of 847 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

1717 13TH ST
Everett, WA 98201

Provider Details

NPI 1548371180
Specialty Hematology & Oncology Physician
Credentials MD
Gender Female
NPI Issued 08/31/2006

Hospital and facility affiliations

Facilities where Xiaowen Wang, MD 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.

Optum Care Washington PLLC
Everett, WA

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 Xiaowen Wang, MD. Source: openpaymentsdata.cms.gov.

Total received

$5.5K

Largest payer

Novartis Pharmaceuticals Corporation

Most common payment type

Long term medical supply or device loan

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 — 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 Xiaowen Wang, MD. To verify Xiaowen Wang, MD'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.

Medicare Part D Prescribing Data

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

1,116
Total Claims
$2.5M
Total Drug Cost
287
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
2,072
Total Day Supply
58,153
Generic Drug Cost
$195K
Opioid Claims
63 (5.6% rate)
Antibiotic Claims
11

Patient Demographics

Average Patient Age
74.4 years
Avg HCC Risk Score
2.39
Gender Split
78% female / 22% male
Age Distribution
<65: 21, 65-74: 132, 75-84: 106, 85+: 28

Top Prescribed Drugs (Medicare Part D)

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

What Xiaowen Wang, MD 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
313
Tamoxifen Citrate
62
Oxycodone Hcl
43
Hydroxyurea
39
Ondansetron Hcl
35
Dexamethasone
29
Prochlorperazine Maleate
29
Letrozole
28
Gabapentin
27
Eliquis
Apixaban
23

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

Hematology & Oncology Physician Overview

How Xiaowen Wang, MD fits within the Hematology & Oncology Physician landscape nationally.

11,215
Hematology & Oncology Physician Providers in US
54
States with Hematology & Oncology Physician
847
Avg Claims per Provider

Xiaowen Wang, MD's 1,116 claims are above the specialty average of 847.

Nearby Hematology & Oncology Physician Providers in Washington

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

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

Before you book an appointment

Use this federal record as your verification checklist, not as a recommendation.

  • Confirm the NPI record is current in the official CMS registry — providers update their own NPPES details, and moves can lag. Verify this NPI
  • Check the active license and any disciplinary history with the Washington medical board — federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Hematology & Oncology Physician peer on Medicare volume and prescribing patterns. Compare providers

Medicare Part D and MIPS figures describe practice patterns in federal programs only — they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.

Frequently Asked Questions

What is Xiaowen Wang, MD's specialty?
Xiaowen Wang, MD specializes in Hematology & Oncology Physician and practices in Everett, Washington. Credentials: MD.
How much does Xiaowen Wang, MD prescribe under Medicare Part D?
In 2023, Xiaowen Wang, MD wrote 1,116 Medicare Part D claims totaling $2.5M in drug costs for 287 beneficiaries.
Where is Xiaowen Wang, MD located?
Xiaowen Wang, MD is located at 1717 13TH ST, Everett, WA, 98201. Phone: (425) 297-5500.
What is Xiaowen Wang, MD's NPI number?
Xiaowen Wang, MD's National Provider Identifier (NPI) is 1548371180, issued on 08/31/2006.
Does Xiaowen Wang, MD prescribe opioids?
Yes, Xiaowen Wang, MD had 63 opioid claims in 2023 with an opioid prescribing rate of 5.6%.
How many Hematology & Oncology Physician providers are there in the US?
There are 11,215 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 Xiaowen Wang, MD prescribe most often?
Based on 2023 Medicare Part D data, Xiaowen Wang, MD's most frequently prescribed drugs include Anastrozole, Tamoxifen Citrate, Oxycodone Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Xiaowen Wang, MD accept Medicare?
Xiaowen Wang, MD appears in CMS Medicare data with 1,116 Part D claims and 287 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Xiaowen Wang, MD's credentials?
Xiaowen Wang, MD's NPI is 1548371180 with credentials MD. 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.
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 PlainDoctor editorial team.