2026 NPPES data Emergency Medicine Physician NPI 1013143999 D.O.
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KATHRYN DIERKS, D.O.

Emergency Medicine Physician in CEDAR RAPIDS, 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
179
Medicare Part D claims · 126 beneficiaries · Emergency Medicine Physician avg: 352
What the federal data reveals: KATHRYN DIERKS, D.O. is a Emergency Medicine Physician ([object Object]) practicing in CEDAR RAPIDS, Iowa with a Medicare Part D prescribing footprint of 179 claims across 126 beneficiaries .

What stands out: KATHRYN DIERKS, D.O. filed 179 Medicare Part D claims in 2023 across CEDAR RAPIDS, Iowa. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board-eligible specialty (heuristic — not verified)

KATHRYN DIERKS, D.O. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

KATHRYN DIERKS, D.O. at a glance

Quality data not reported

NPI registry status

Active

Issued 06/04/2009

NPI 1013143999

Primary specialty

Emergency Medicine Physician

High-volume

64,398 US NPIs in this specialty

Medicare Part D claims

179 49% vs specialty avg

2023 prescription claims

Specialty avg: 352

Specialty distribution in Iowa

How Emergency Medicine Physician compares to other specialties among Iowa providers

Iowa providers

Emergency Medicine Physician share within Iowa

1. Emergency Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Emergency Medicine Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Emergency Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Emergency Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Emergency Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Emergency Medicine 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).

KATHRYN DIERKS, D.O. is a Emergency Medicine Physician provider practicing in CEDAR RAPIDS, Iowa, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: D.O.. NPI: 1013143999. 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.

KATHRYN DIERKS, D.O. appears in the CMS NPPES registry as a Emergency Medicine Physician provider holding D.O. credentials at 1026 A AVE NE, CEDAR RAPIDS, IA, 52402, with a listed phone of (319) 369-8600. NPI 1013143999 was issued on 06/04/2009. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DIERKS 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 179 prescription claims written by this provider, covering 126 Medicare beneficiaries and totaling roughly $4K in drug spend, with an opioid prescribing rate of 24.6%. 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.

Emergency Medicine Physician is a high-volume specialty nationwide, with 64,398 enrolled providers across 56 states and an average of 352 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

1026 A AVE NE
CEDAR RAPIDS, IA 52402

Provider Details

NPI 1013143999
Specialty Emergency Medicine Physician
Credentials D.O.
Gender Female
NPI Issued 06/04/2009

Medicare Part D Prescribing Data

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

179
Total Claims
$4K
Total Drug Cost
126
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
188
Total Day Supply
1,863
Generic Drug Cost
$2K
Opioid Claims
44 (24.6% rate)
Antibiotic Claims
50

Patient Demographics

Average Patient Age
66.1 years
Avg HCC Risk Score
1.64
Gender Split
63% female / 37% male
Age Distribution
<65: 38, 65-74: 47, 75-84: N/A, 85+: N/A

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Hydrocodone-Acetaminophen
Hydrocodone/Acetaminophen
37
Cephalexin
14

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

Emergency Medicine Physician Overview

How KATHRYN DIERKS, D.O. fits within the Emergency Medicine Physician landscape nationally.

64,398
Emergency Medicine Physician Providers in US
56
States with Emergency Medicine Physician
352
Avg Claims per Provider

KATHRYN DIERKS, D.O.'s 179 claims are below the specialty average of 352.

Nearby Emergency Medicine Physician Providers in Iowa

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

Compare Emergency Medicine Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KATHRYN DIERKS, D.O.'s specialty?
KATHRYN DIERKS, D.O. specializes in Emergency Medicine Physician and practices in CEDAR RAPIDS, Iowa. Credentials: D.O..
How much does KATHRYN DIERKS, D.O. prescribe under Medicare Part D?
In 2023, KATHRYN DIERKS, D.O. wrote 179 Medicare Part D claims totaling $4K in drug costs for 126 beneficiaries.
Where is KATHRYN DIERKS, D.O. located?
KATHRYN DIERKS, D.O. is located at 1026 A AVE NE, CEDAR RAPIDS, IA, 52402. Phone: (319) 369-8600.
What is KATHRYN DIERKS, D.O.'s NPI number?
KATHRYN DIERKS, D.O.'s National Provider Identifier (NPI) is 1013143999, issued on 06/04/2009.
Does KATHRYN DIERKS, D.O. prescribe opioids?
Yes, KATHRYN DIERKS, D.O. had 44 opioid claims in 2023 with an opioid prescribing rate of 24.6%.
How many Emergency Medicine Physician providers are there in the US?
There are 64,398 Emergency Medicine Physician providers across 56 states in the US. The average Emergency Medicine Physician provider writes 352 Medicare Part D claims per year.
What drugs does KATHRYN DIERKS, D.O. prescribe most often?
Based on 2023 Medicare Part D data, KATHRYN DIERKS, D.O.'s most frequently prescribed drugs include Hydrocodone-Acetaminophen, Cephalexin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KATHRYN DIERKS, D.O. accept Medicare?
KATHRYN DIERKS, D.O. appears in CMS Medicare data with 179 Part D claims and 126 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KATHRYN DIERKS, D.O.'s credentials?
KATHRYN DIERKS, D.O.'s NPI is 1013143999 with credentials D.O.. 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