Medicare Enrolled

Dr. Katherine Marshall, OD

Optometrist · Dowagiac, MI
Practice pattern: Clinical Cardiology — Primarily office-based clinical cardiology
55021 M 51 N, Dowagiac, MI 49047
2697823476
Registered in NPPES since 2014
NPI: 1255740239 verify on NPPES ↗
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating. This page presents federal public records about Dr. Marshall from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Marshall

Dr. Katherine Marshall is an optometrist in Dowagiac, MI, with 12 years of NPI registration. Based on federal Medicare data, Dr. Marshall performed 167 Medicare services in 2023. These records do not provide a deduplicated patient total.

Between the years covered by Open Payments, Dr. Marshall received a total of $106 from 4 pharmaceutical and/or device companies across 6 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.

The Data Coverage level for Dr. Marshall is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.

✓ 12 years of NPI registration ▲ Top 49% volume in MI $106 industry payments

Medicare Practice Summary — 2023

Medicare Utilization ↗
167
Medicare services
Top 49% in MI for optometrist
Not available
Unique patients (not deduplicated)
$49
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →

Top procedures by volume

Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.

Procedure Volume Avg. paid Avg. submitted
Comprehensive eye exam, established patient
A comprehensive examination of the visual system performed for a patient who has previously been seen by the provider.
 76 $59 $100
Retinal photography (fundus photo)
This procedure involves taking photographs of the retina, the light-sensitive tissue at the back of the eye. It is used to document the condition of the eye's interior structures.
 28 $24 $75
Office visit, established patient (10-19 min)
An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition.
 23 $26 $45
Office visit, established patient (20-29 min)
An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition.
 22 $54 $75
Comprehensive eye exam, new patient
A comprehensive examination of the visual system performed for a new patient.
 18 $65 $120
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.

Industry Payment Transparency

Open Payments through 2024 ↗
$106
Total received (2018-2024)
Avg $27/year across 4 years
Bottom 20% in MI for optometrist
4
Companies
6
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →

Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.

Payment trend by year

Annual totals from pharmaceutical and medical device companies.

2024
$37
2023
$38
2019
$18
2018
$13

Payments by company (2024)

Alcon Vision LLC
$20
Johnson & Johnson Vision Care, Inc.
$18
Top 3 companies account for 100.0% of 2024 payments
All-time payments by company (2018-2024) ›
BIOTISSUE HOLDINGS, INC.
$38
Johnson & Johnson Vision Care, Inc.
$35
Alcon Vision LLC
$20
Bausch & Lomb, a division of Bausch Health US, LLC
$13
Top 3 companies account for 87.8% of all-time payments
Associated products mentioned in payments ›
Acuvue · PROKERA · Precision 1 · ZEN LENS
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Looking for an optometrist in Dowagiac?
Compare optometrists in the Dowagiac area by procedure volume, costs, and industry payment transparency.
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Geographic Context

Optometrists in nearby ZIP areas
117
County median income
$68,011
Nearest hospital to ZIP centroid (approximate)
ASCENSION BORGESS LEE HOSPITAL
0.0 mi

Data Sources

Provider Registry ✓ NPPES NPPES snapshot; verify current record
Medicare Enrollment ✓ PECOS PECOS snapshot
Practice Data ✓ Medicare Util. Annual (CY lag)
Industry Payments ✓ Open Payments CY 2024
Disciplinary History — Not included N/A

This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →

Summary

Dr. Marshall is a clinical cardiology specialist, with moderate Medicare volume.

This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →

Frequently Asked Questions

Is Dr. Marshall experienced with comprehensive eye exam, established patient?
Based on Medicare claims data, Dr. Marshall performed 76 comprehensive eye exam, established patient services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Marshall receive payments from pharmaceutical companies?
Yes. Dr. Marshall received a total of $106 from 4 companies across 6 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Marshall's costs compare to other optometrists in Dowagiac?
Dr. Marshall's average Medicare payment per service is $49. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Marshall) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →

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About this page

This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.

This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.

Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology

Data Disclaimer — Data sourced from the Centers for Medicare & Medicaid Services (CMS): National Plan and Provider Enumeration System (NPPES), Open Payments program, Medicare Provider Utilization and Payment Data, and Provider Enrollment & Certification data (PECOS). Published under the Freedom of Information Act (FOIA). This website is not affiliated with, endorsed by, or authorized by CMS, HHS, or the U.S. Government. Data may contain errors as reported to CMS by providers and reporting entities. Industry payment disclosure alone establishes neither wrongdoing nor legality. Medicare data reflects only patients aged 65+ or those with qualifying disabilities. For corrections, contact CMS directly. This information does not constitute medical advice and should not be used as the sole basis for choosing a healthcare provider. Procedure descriptions use plain language and do not reference CPT® codes, which are copyrighted by the American Medical Association. Full methodology → · Report a data error → · Privacy policy →