2026 NPPES data Neuromuscular Medicine (Psychiatry & Neurology) Physician NPI 1326034984 MD
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KATHERINE MATHEWS, MD

Neuromuscular Medicine (Psychiatry & Neurology) Physician in IOWA CITY, 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
165
Medicare Part D claims · 17 beneficiaries · Neuromuscular Medicine (Psychiatry & Neurology) Physician avg: 931
Generic prescribing
52%
generic claims · 48% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$34.6K
15 payments · CMS Open Payments (Sunshine Act)
What the federal data reveals: KATHERINE MATHEWS, MD is a Neuromuscular Medicine (Psychiatry & Neurology) Physician ([object Object]) practicing in IOWA CITY, Iowa with a Medicare Part D prescribing footprint of 165 claims across 17 beneficiaries — 48% brand-name prescribing . Industry payments of $34.6K across 15 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: KATHERINE MATHEWS, MD filed 165 Medicare Part D claims in 2023 across IOWA CITY, Iowa. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

Board certification likely (heuristic — not verified)

KATHERINE MATHEWS, 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).

KATHERINE MATHEWS, MD at a glance

Quality data not reported

NPI registry status

Active

Issued 09/20/2005

NPI 1326034984

Primary specialty

Neuromuscular Medicine (Psychiatry & Neurology) Physician

Rare

336 US NPIs in this specialty

Medicare Part D claims

165 82% vs specialty avg

2023 prescription claims

Specialty avg: 931

Specialty distribution in Iowa

How Neuromuscular Medicine (Psychiatry & Neurology) Physician compares to other specialties among Iowa providers

Iowa providers

Neuromuscular Medicine (Psychiatry & Neurology) Physician share within Iowa

1. Neuromuscular Medicine (Psychiatry & Neurology) Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Neuromuscular Medicine (Psychiatry & Neurology) Physician share within Iowa

Specialty board-certification context

Estimated specialty board-certified rate — Neuromuscular Medicine (Psychiatry & Neurology) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Neuromuscular Medicine (Psychiatry & Neurology) Physician ABMS/AOA estimate

Est. board-certified rate (Neuromuscular Medicine (Psychiatry & Neurology) Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Neuromuscular Medicine (Psychiatry & Neurology) 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).

KATHERINE MATHEWS, MD is a Neuromuscular Medicine (Psychiatry & Neurology) Physician provider practicing in IOWA CITY, Iowa, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: MD. NPI: 1326034984. 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.

KATHERINE MATHEWS, MD appears in the CMS NPPES registry as a Neuromuscular Medicine (Psychiatry & Neurology) Physician provider holding MD credentials at 200 HAWKINS DR, IOWA CITY, IA, 52242, with a listed phone of (319) 356-1851. NPI 1326034984 was issued on 09/20/2005. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what MATHEWS 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 165 prescription claims written by this provider, covering 17 Medicare beneficiaries and totaling roughly $2.1 million in drug spend, split 48% brand-name and 52% generic by claim count. 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.

Neuromuscular Medicine (Psychiatry & Neurology) Physician is a narrow specialty nationwide, with 336 enrolled providers across 44 states and an average of 931 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

200 HAWKINS DR
IOWA CITY, IA 52242

Provider Details

NPI 1326034984
Specialty Neuromuscular Medicine (Psychiatry & Neurology) Physician
Credentials MD
Gender Female
NPI Issued 09/20/2005

Hospital and facility affiliations

Facilities where KATHERINE MATHEWS, 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.

STATE UNIVERSITY OF IOWA
IOWA 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 KATHERINE MATHEWS, MD. Source: openpaymentsdata.cms.gov.

Total received

$34.6K

Largest payer

Sarepta Therapeutics, Inc.

Most common payment type

Travel and Lodging

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.

Brand vs generic prescribing mix · Above average

KATHERINE MATHEWS, MD — brand share 48.0%
Specialty average (est.)

48% brand-name claims vs 52% generic, on 165 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.

165
Total Claims
$2.1M
Total Drug Cost
17
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
195
Total Day Supply
5,591
Brand vs Generic
48% brand / 52% generic
Brand Drug Cost
$2.0M
Generic Drug Cost
$13K

Patient Demographics

Average Patient Age
40.2 years
Avg HCC Risk Score
2.19

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Evrysdi
Risdiplam
40
Skyclarys
Omaveloxolone
26
Sertraline Hcl
17
Carbidopa-Levodopa
Carbidopa/Levodopa
16
Baclofen
14
Emflaza
Deflazacort
14
Gabapentin
14
Prednisone
11

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

Neuromuscular Medicine (Psychiatry & Neurology) Physician Overview

How KATHERINE MATHEWS, MD fits within the Neuromuscular Medicine (Psychiatry & Neurology) Physician landscape nationally.

336
Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in US
44
States with Neuromuscular Medicine (Psychiatry & Neurology) Physician
931
Avg Claims per Provider

KATHERINE MATHEWS, MD's 165 claims are below the specialty average of 931.

Nearby Neuromuscular Medicine (Psychiatry & Neurology) Physician Providers in Iowa

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

Compare Neuromuscular Medicine (Psychiatry & Neurology) Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is KATHERINE MATHEWS, MD's specialty?
KATHERINE MATHEWS, MD specializes in Neuromuscular Medicine (Psychiatry & Neurology) Physician and practices in IOWA CITY, Iowa. Credentials: MD.
How much does KATHERINE MATHEWS, MD prescribe under Medicare Part D?
In 2023, KATHERINE MATHEWS, MD wrote 165 Medicare Part D claims totaling $2.1M in drug costs for 17 beneficiaries.
Where is KATHERINE MATHEWS, MD located?
KATHERINE MATHEWS, MD is located at 200 HAWKINS DR, IOWA CITY, IA, 52242. Phone: (319) 356-1851.
What is KATHERINE MATHEWS, MD's NPI number?
KATHERINE MATHEWS, MD's National Provider Identifier (NPI) is 1326034984, issued on 09/20/2005.
Does KATHERINE MATHEWS, MD prescribe more brand-name or generic drugs?
KATHERINE MATHEWS, MD's prescribing is 48% brand-name and 52% generic drugs by claim count, with $2.0M in brand drug costs.
How many Neuromuscular Medicine (Psychiatry & Neurology) Physician providers are there in the US?
There are 336 Neuromuscular Medicine (Psychiatry & Neurology) Physician providers across 44 states in the US. The average Neuromuscular Medicine (Psychiatry & Neurology) Physician provider writes 931 Medicare Part D claims per year.
What drugs does KATHERINE MATHEWS, MD prescribe most often?
Based on 2023 Medicare Part D data, KATHERINE MATHEWS, MD's most frequently prescribed drugs include Evrysdi, Skyclarys, Sertraline Hcl. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KATHERINE MATHEWS, MD accept Medicare?
KATHERINE MATHEWS, MD appears in CMS Medicare data with 165 Part D claims and 17 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KATHERINE MATHEWS, MD's credentials?
KATHERINE MATHEWS, MD's NPI is 1326034984 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