2026 NPPES data Primary Care Nurse Practitioner NPI 1649922410 DNP, ARNP
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CASSANDRA ZIMMERMAN, DNP, ARNP

Primary Care Nurse Practitioner in MARION, Iowa. 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
2K
Medicare Part D claims · 240 beneficiaries · Primary Care Nurse Practitioner avg: 1K
Generic prescribing
91%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
What the federal data reveals: CASSANDRA ZIMMERMAN, DNP, ARNP is a Primary Care Nurse Practitioner ([object Object]) practicing in MARION, Iowa with a Medicare Part D prescribing footprint of 2K claims across 240 beneficiaries — 9% brand-name prescribing .

What stands out: CASSANDRA ZIMMERMAN, DNP, ARNP filed 1,827 Medicare Part D claims in 2023 across MARION, Iowa. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

CASSANDRA ZIMMERMAN, DNP, ARNP at a glance

Quality data not reported

NPI registry status

Active

Issued 01/24/2022

NPI 1649922410

Primary specialty

Primary Care Nurse Practitioner

Mid-sized

10,138 US NPIs in this specialty

Medicare Part D claims

1,827 34% vs specialty avg

2023 prescription claims

Specialty avg: 1,363

Specialty distribution in Iowa

How Primary Care Nurse Practitioner compares to other specialties among Iowa providers

Iowa providers

Primary Care Nurse Practitioner share within Iowa

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

Specialty board-certification context

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

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

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

0%100%78%
Est. board-certified rate (Primary Care 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).

CASSANDRA ZIMMERMAN, DNP, ARNP is a Primary Care Nurse Practitioner provider practicing in MARION, Iowa, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: DNP, ARNP. NPI: 1649922410. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

CASSANDRA ZIMMERMAN, DNP, ARNP appears in the CMS NPPES registry as a Primary Care Nurse Practitioner provider holding DNP, ARNP credentials at UNITYPOINT CLINIC FAMILY MEDICINE TOWER TERRACE, MARION, IA, 52302, with a listed phone of (319) 206-7370. NPI 1649922410 was issued on 01/24/2022. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what ZIMMERMAN 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 1,827 prescription claims written by this provider, covering 240 Medicare beneficiaries and totaling roughly $109K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 1.8%. 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.

Primary Care Nurse Practitioner is a mid-sized specialty nationwide, with 10,138 enrolled providers across 54 states and an average of 1,363 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

UNITYPOINT CLINIC FAMILY MEDICINE TOWER TERRACE
MARION, IA 52302

Provider Details

NPI 1649922410
Specialty Primary Care Nurse Practitioner
Credentials DNP, ARNP
Gender Female
NPI Issued 01/24/2022

Hospital and facility affiliations

Facilities where CASSANDRA ZIMMERMAN, DNP, 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.

IOWA PHYSICIANS CLINIC MEDICAL FOUNDATION
CEDAR RAPIDS, 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).

Brand vs generic prescribing mix · Generic-heavy

CASSANDRA ZIMMERMAN, DNP, ARNP — brand share 9.0%
Specialty average (est.)

9% brand-name claims vs 91% generic, on 1,827 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.

1,827
Total Claims
$109K
Total Drug Cost
240
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,719
Total Day Supply
104,631
Brand vs Generic
9% brand / 91% generic
Brand Drug Cost
$81K
Generic Drug Cost
$28K
Opioid Claims
32 (1.8% rate)
Antibiotic Claims
34

Patient Demographics

Average Patient Age
69.1 years
Avg HCC Risk Score
1.00
Gender Split
64% female / 36% male
Age Distribution
<65: 45, 65-74: 117, 75-84: 65, 85+: 13

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Levothyroxine Sodium
90
Atorvastatin Calcium
73
Gabapentin
65
Amlodipine Besylate
64
Omeprazole
48
Lisinopril
45
Simvastatin
39
Albuterol Sulfate Hfa
Albuterol Sulfate
36
Metformin Hcl Er
Metformin Hcl
36
Alendronate Sodium
34

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

Primary Care Nurse Practitioner Overview

How CASSANDRA ZIMMERMAN, DNP, ARNP fits within the Primary Care Nurse Practitioner landscape nationally.

10,138
Primary Care Nurse Practitioner Providers in US
54
States with Primary Care Nurse Practitioner
1,363
Avg Claims per Provider

CASSANDRA ZIMMERMAN, DNP, ARNP's 1,827 claims are above the specialty average of 1,363.

Nearby Primary Care Nurse Practitioner Providers in Iowa

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

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

Frequently Asked Questions

What is CASSANDRA ZIMMERMAN, DNP, ARNP's specialty?
CASSANDRA ZIMMERMAN, DNP, ARNP specializes in Primary Care Nurse Practitioner and practices in MARION, Iowa. Credentials: DNP, ARNP.
How much does CASSANDRA ZIMMERMAN, DNP, ARNP prescribe under Medicare Part D?
In 2023, CASSANDRA ZIMMERMAN, DNP, ARNP wrote 1,827 Medicare Part D claims totaling $109K in drug costs for 240 beneficiaries.
Where is CASSANDRA ZIMMERMAN, DNP, ARNP located?
CASSANDRA ZIMMERMAN, DNP, ARNP is located at UNITYPOINT CLINIC FAMILY MEDICINE TOWER TERRACE, MARION, IA, 52302. Phone: (319) 206-7370.
What is CASSANDRA ZIMMERMAN, DNP, ARNP's NPI number?
CASSANDRA ZIMMERMAN, DNP, ARNP's National Provider Identifier (NPI) is 1649922410, issued on 01/24/2022.
Does CASSANDRA ZIMMERMAN, DNP, ARNP prescribe more brand-name or generic drugs?
CASSANDRA ZIMMERMAN, DNP, ARNP's prescribing is 9% brand-name and 91% generic drugs by claim count, with $81K in brand drug costs.
Does CASSANDRA ZIMMERMAN, DNP, ARNP prescribe opioids?
Yes, CASSANDRA ZIMMERMAN, DNP, ARNP had 32 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Primary Care Nurse Practitioner providers are there in the US?
There are 10,138 Primary Care Nurse Practitioner providers across 54 states in the US. The average Primary Care Nurse Practitioner provider writes 1,363 Medicare Part D claims per year.
What drugs does CASSANDRA ZIMMERMAN, DNP, ARNP prescribe most often?
Based on 2023 Medicare Part D data, CASSANDRA ZIMMERMAN, DNP, ARNP's most frequently prescribed drugs include Levothyroxine Sodium, Atorvastatin Calcium, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CASSANDRA ZIMMERMAN, DNP, ARNP accept Medicare?
CASSANDRA ZIMMERMAN, DNP, ARNP appears in CMS Medicare data with 1,827 Part D claims and 240 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CASSANDRA ZIMMERMAN, DNP, ARNP's credentials?
CASSANDRA ZIMMERMAN, DNP, ARNP's NPI is 1649922410 with credentials DNP, 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