2026 NPPES data Nurse Practitioner NPI 1437119849 APNP
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KIMBERLY DAY, APNP

Nurse Practitioner in MADISON, Wisconsin. 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
955
Medicare Part D claims · 367 beneficiaries · Nurse Practitioner avg: 1K

What the federal data shows

KIMBERLY DAY, APNP filed 955 Medicare Part D claims in 2023 as a Nurse Practitioner in MADISON, Wisconsin.

955
Part D claims, 2023

Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) — no proprietary rating or editorial opinion is applied.

KIMBERLY DAY, APNP's Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

955 Top 25% higher than 75% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). Below this entry. 800–1,000: 40,919 prescribers (3%). This entry sits in this band. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source CMS Medicare Part D Prescriber Public Use File · 2023

What does the federal data show about KIMBERLY DAY, APNP?

Quality data not reported

NPI registry status

Active

Issued 03/28/2006

NPI 1437119849

Primary specialty

Nurse Practitioner

High-volume

87,227 US NPIs in this specialty

Medicare Part D claims

955 12% vs specialty avg

2023 prescription claims

Specialty avg: 1,084

Specialty distribution in Wisconsin

How Nurse Practitioner compares to other specialties among Wisconsin providers

Wisconsin providers

Nurse Practitioner share within Wisconsin

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

Specialty board-certification context

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

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

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

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

KIMBERLY DAY, APNP appears in the CMS NPPES registry as a Nurse Practitioner provider holding APNP credentials at 1821 S STOUGHTON RD, MADISON, WI, 53716, with a listed phone of (608) 260-6000. NPI 1437119849 was issued on 03/28/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what DAY 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 955 prescription claims written by this provider, covering 367 Medicare beneficiaries and totaling roughly $49K 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.

Nurse Practitioner is a high-volume specialty nationwide, with 87,227 enrolled providers across 56 states and an average of 1,084 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

1821 S STOUGHTON RD
MADISON, WI 53716

Provider Details

NPI 1437119849
Specialty Nurse Practitioner
Credentials APNP
Gender Female
NPI Issued 03/28/2006

Hospital and facility affiliations

Facilities where KIMBERLY DAY, APNP 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.

DEAN HEALTH SYSTEMS INC
FORT ATKINSON, WI
PROHEALTH MEDICAL GROUP INC
PEWAUKEE, WI

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Medicare Part D Prescribing Data

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

955
Total Claims
$49K
Total Drug Cost
367
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
1,467
Total Day Supply
35,281
Generic Drug Cost
$16K
Antibiotic Claims
177

Patient Demographics

Average Patient Age
70.5 years
Avg HCC Risk Score
1.16
Gender Split
72% female / 28% male
Age Distribution
<65: 76, 65-74: 148, 75-84: 110, 85+: 33

Top Prescribed Drugs (Medicare Part D)

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

What KIMBERLY DAY, APNP prescribes most

Top Medicare Part D drugs by claim count, 2023

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
Drug Claims
Prednisone
64
Doxycycline Hyclate
62
Levothyroxine Sodium
36
Atorvastatin Calcium
32
Amoxicillin-Clavulanate Potass
Amoxicillin/Potassium Clav
26
Cephalexin
24
Methylprednisolone
22
Albuterol Sulfate Hfa
Albuterol Sulfate
20
Lisinopril
17
Montelukast Sodium
17

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

Nurse Practitioner Overview

How KIMBERLY DAY, APNP fits within the Nurse Practitioner landscape nationally.

87,227
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider

KIMBERLY DAY, APNP's 955 claims are below the specialty average of 1,084.

Nearby Nurse Practitioner Providers in Wisconsin

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

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

Frequently Asked Questions

What is KIMBERLY DAY, APNP's specialty?
KIMBERLY DAY, APNP specializes in Nurse Practitioner and practices in MADISON, Wisconsin. Credentials: APNP.
How much does KIMBERLY DAY, APNP prescribe under Medicare Part D?
In 2023, KIMBERLY DAY, APNP wrote 955 Medicare Part D claims totaling $49K in drug costs for 367 beneficiaries.
Where is KIMBERLY DAY, APNP located?
KIMBERLY DAY, APNP is located at 1821 S STOUGHTON RD, MADISON, WI, 53716. Phone: (608) 260-6000.
What is KIMBERLY DAY, APNP's NPI number?
KIMBERLY DAY, APNP's National Provider Identifier (NPI) is 1437119849, issued on 03/28/2006.
How many Nurse Practitioner providers are there in the US?
There are 87,227 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
What drugs does KIMBERLY DAY, APNP prescribe most often?
Based on 2023 Medicare Part D data, KIMBERLY DAY, APNP's most frequently prescribed drugs include Prednisone, Doxycycline Hyclate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does KIMBERLY DAY, APNP accept Medicare?
KIMBERLY DAY, APNP appears in CMS Medicare data with 955 Part D claims and 367 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify KIMBERLY DAY, APNP's credentials?
KIMBERLY DAY, APNP's NPI is 1437119849 with credentials APNP. 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