2026 NPPES data Gerontology Nurse Practitioner NPI 1093115503
Verify on CMS →

CATHY BAYS

Gerontology Nurse Practitioner in LOUISVILLE, Kentucky. 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
309
Medicare Part D claims · 80 beneficiaries · Gerontology Nurse Practitioner avg: 1K
What the federal data reveals: CATHY BAYS is a Gerontology Nurse Practitioner ([object Object]) practicing in LOUISVILLE, Kentucky with a Medicare Part D prescribing footprint of 309 claims across 80 beneficiaries .

What stands out: CATHY BAYS filed 309 Medicare Part D claims in 2023 across LOUISVILLE, Kentucky. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

CATHY BAYS at a glance

Quality data not reported

NPI registry status

Active

Issued 09/03/2014

NPI 1093115503

Primary specialty

Gerontology Nurse Practitioner

Mid-sized

9,625 US NPIs in this specialty

Medicare Part D claims

309 76% vs specialty avg

2023 prescription claims

Specialty avg: 1,283

Specialty distribution in Kentucky

How Gerontology Nurse Practitioner compares to other specialties among Kentucky providers

Kentucky providers

Gerontology Nurse Practitioner share within Kentucky

1. Gerontology Nurse Practitioner42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Gerontology Nurse Practitioner share within Kentucky

Specialty board-certification context

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

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

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

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

CATHY BAYS is a Gerontology Nurse Practitioner provider practicing in LOUISVILLE, Kentucky, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1093115503. 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.

CATHY BAYS appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider at 401 E CHESTNUT ST UNIT 510, LOUISVILLE, KY, 40202, with a listed phone of (502) 588-4800. NPI 1093115503 was issued on 09/03/2014. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what BAYS 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 309 prescription claims written by this provider, covering 80 Medicare beneficiaries and totaling roughly $52K in drug spend. 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.

Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,625 enrolled providers across 54 states and an average of 1,283 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

401 E CHESTNUT ST UNIT 510
LOUISVILLE, KY 40202

Provider Details

NPI 1093115503
Specialty Gerontology Nurse Practitioner
Gender Female
NPI Issued 09/03/2014

Medicare Part D Prescribing Data

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

309
Total Claims
$52K
Total Drug Cost
80
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
618
Total Day Supply
17,980
Generic Drug Cost
$12K

Patient Demographics

Average Patient Age
73.4 years
Avg HCC Risk Score
1.39
Gender Split
71% female / 29% male

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Memantine Hcl
65
Donepezil Hcl
48
Levetiracetam
20
Mirtazapine
16
Emgality Pen
Galcanezumab-Gnlm
14
Rivastigmine
14
Galantamine Hbr
13
Sumatriptan Succinate
12

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

Gerontology Nurse Practitioner Overview

How CATHY BAYS fits within the Gerontology Nurse Practitioner landscape nationally.

9,625
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider

CATHY BAYS's 309 claims are below the specialty average of 1,283.

Nearby Gerontology Nurse Practitioner Providers in Kentucky

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

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

Frequently Asked Questions

What is CATHY BAYS's specialty?
CATHY BAYS specializes in Gerontology Nurse Practitioner and practices in LOUISVILLE, Kentucky.
How much does CATHY BAYS prescribe under Medicare Part D?
In 2023, CATHY BAYS wrote 309 Medicare Part D claims totaling $52K in drug costs for 80 beneficiaries.
Where is CATHY BAYS located?
CATHY BAYS is located at 401 E CHESTNUT ST UNIT 510, LOUISVILLE, KY, 40202. Phone: (502) 588-4800.
What is CATHY BAYS's NPI number?
CATHY BAYS's National Provider Identifier (NPI) is 1093115503, issued on 09/03/2014.
How many Gerontology Nurse Practitioner providers are there in the US?
There are 9,625 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does CATHY BAYS prescribe most often?
Based on 2023 Medicare Part D data, CATHY BAYS's most frequently prescribed drugs include Memantine Hcl, Donepezil Hcl, Levetiracetam. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does CATHY BAYS accept Medicare?
CATHY BAYS appears in CMS Medicare data with 309 Part D claims and 80 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify CATHY BAYS's credentials?
CATHY BAYS's NPI is 1093115503. 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