2026 NPPES data Nurse Practitioner NPI 1326618281 ARNP
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MAXWELL ZAMZOW, ARNP

Nurse Practitioner in MARYSVILLE, 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
686
Medicare Part D claims · 223 beneficiaries · Nurse Practitioner avg: 1K

What the federal data shows

MAXWELL ZAMZOW, ARNP filed 686 Medicare Part D claims in 2023 as a Nurse Practitioner in MARYSVILLE, Washington.

686
Part D claims, 2023

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.

MAXWELL ZAMZOW, ARNP's Medicare Part D volume vs every U.S. prescriber

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

686 Top 31% higher than 69% 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%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 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

What does the federal data show about MAXWELL ZAMZOW, ARNP?

Quality data not reported

NPI registry status

Active

Issued 07/01/2021

NPI 1326618281

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

686 37% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

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

Specialty board-certification context

Estimated specialty board-certified rate — Nurse Practitioner (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Nurse Practitioner ABMS/AOA estimate

Est. board-certified rate (Nurse Practitioner) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Nurse Practitioner) — 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).

MAXWELL ZAMZOW, ARNP appears in the CMS NPPES registry as a Nurse Practitioner provider holding ARNP credentials at 2901 174TH ST NE, MARYSVILLE, WA, 98271, with a listed phone of (360) 454-1900. NPI 1326618281 was issued on 07/01/2021. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ZAMZOW 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 686 prescription claims written by this provider, covering 223 Medicare beneficiaries and totaling roughly $61K in drug spend, with an opioid prescribing rate of 2.9%. 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.

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

2901 174TH ST NE
MARYSVILLE, WA 98271

Provider Details

NPI 1326618281
Specialty Nurse Practitioner
Credentials ARNP
Gender Male
NPI Issued 07/01/2021

Hospital and facility affiliations

Facilities where MAXWELL ZAMZOW, 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.

OPTUM CARE WASHINGTON PLLC
MARYSVILLE, WA
THE POLYCLINIC PLLC
SEATTLE, 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).

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 MAXWELL ZAMZOW, ARNP. To verify MAXWELL ZAMZOW, 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.

Medicare Part D Prescribing Data

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

686
Total Claims
$61K
Total Drug Cost
223
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,553
Total Day Supply
44,761
Generic Drug Cost
$14K
Opioid Claims
20 (2.9% rate)
Antibiotic Claims
31

Patient Demographics

Average Patient Age
71.9 years
Avg HCC Risk Score
1.51
Gender Split
70% female / 30% male
Age Distribution
<65: 19, 65-74: 118, 75-84: 72, 85+: 14

Top Prescribed Drugs (Medicare Part D)

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

What MAXWELL ZAMZOW, 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
Atorvastatin Calcium
45
Levothyroxine Sodium
40
Losartan Potassium
37
Omeprazole
31
Amlodipine Besylate
30
Gabapentin
20
Albuterol Sulfate Hfa
Albuterol Sulfate
18
Lisinopril
17
Fluticasone Propionate
16
Trazodone Hcl
15

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

Nurse Practitioner Overview

How MAXWELL ZAMZOW, 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

MAXWELL ZAMZOW, ARNP's 686 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 ZAMZOW.

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

Frequently Asked Questions

What is MAXWELL ZAMZOW, ARNP's specialty?
MAXWELL ZAMZOW, ARNP specializes in Nurse Practitioner and practices in MARYSVILLE, Washington. Credentials: ARNP.
How much does MAXWELL ZAMZOW, ARNP prescribe under Medicare Part D?
In 2023, MAXWELL ZAMZOW, ARNP wrote 686 Medicare Part D claims totaling $61K in drug costs for 223 beneficiaries.
Where is MAXWELL ZAMZOW, ARNP located?
MAXWELL ZAMZOW, ARNP is located at 2901 174TH ST NE, MARYSVILLE, WA, 98271. Phone: (360) 454-1900.
What is MAXWELL ZAMZOW, ARNP's NPI number?
MAXWELL ZAMZOW, ARNP's National Provider Identifier (NPI) is 1326618281, issued on 07/01/2021.
Does MAXWELL ZAMZOW, ARNP prescribe opioids?
Yes, MAXWELL ZAMZOW, ARNP had 20 opioid claims in 2023 with an opioid prescribing rate of 2.9%.
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 MAXWELL ZAMZOW, ARNP prescribe most often?
Based on 2023 Medicare Part D data, MAXWELL ZAMZOW, ARNP's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does MAXWELL ZAMZOW, ARNP accept Medicare?
MAXWELL ZAMZOW, ARNP appears in CMS Medicare data with 686 Part D claims and 223 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify MAXWELL ZAMZOW, ARNP's credentials?
MAXWELL ZAMZOW, ARNP's NPI is 1326618281 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.
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