NPPES file of Aug 9, 2026

Kay Lynn Day, FNP

Family Nurse Practitioner · Ballwin, MO

Kay Lynn Day, FNP is a family nurse practitioner with a practice address in Ballwin, Missouri, and NPI 1063881019, issued on Sep 21, 2015. Check the license (Missouri 2015033114, as entered in NPPES) with the Missouri board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1063881019
Name
Kay Lynn Day
Credential
FNP
Primary taxonomy
Family Nurse Practitioner 363LF0000X
License number
2015033114 MO
Self-reported in NPPES; status is on the state search
Practice location
14400 Clayton RD, Ballwin, MO 63011
Phone
(636) 207-1137
Enumerated
Sep 21, 2015
Record last updated
Apr 29, 2026
Fax
(636) 527-0225
Medicare enrollment
Enrolled (PECOS I20151211000259); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 14400 Clayton RD

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michelle Brooks, FNP-BCFamily Nurse Practitioner1861225666
  2. Jayna FreemanPharmacist1912821992
  3. Meghan Lambert, FNPFamily Nurse Practitioner1780138891
  4. Kristi Ramos, NP-CFamily Nurse Practitioner1205265196
  5. Tatonya Roberts, FNPFamily Nurse Practitioner1639603293
  6. Amina Spijodic, FNP-CFamily Nurse Practitioner1770357287

Verify Kay Lynn Day in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Missouri board licenses this profession
    Search for license 2015033114    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Find the Missouri license search

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94% fewer Medicare Part D claims than the average family nurse practitioner in 2024

83 Medicare Part D claims for 52 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D.

  1. Kay Day83
  2. Specialty average1,305

Most prescribed

  1. Prednisone17 claims
  2. Amoxicillin-Clavulanate Potass13 claims

Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.

Bills Medicare through one group practice

  1. Total Access Urgent Care PCSaint Louis, MO

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

28 family nurse practitioner records list a practice address in Ballwin

They are 28 of the 562 NPPES records with a practice address in Ballwin, and 5,226 family nurse practitioner records in Missouri.

All 28 in Ballwin → All 5,226 in Missouri → Every provider in Ballwin →

Other family nurse practitioner records in Missouri

  1. Sara Abben, APRNGrandview, MO1760105274
  2. Andrea Abbott, FNP-CChesterfield, MO1588003842
  3. Dana Abdel Jawad, DNP, APRN, FNP-CKansas City, MO1245185974
  4. Zara Abdush-Shakir Bever, FNPKansas City, MO1265283923
  5. Patricia Abele, NPChesterfield, MO1265418057
  6. Abisola AbimbolaSaint Louis, MO1083440457
  7. Melissa Abramovitz, FNP-BCKansas City, MO1679170005
  8. Ana Abrudan-Danalache, FNPWillard, MO1053035394
  9. Karen Abt, FNPCape Girardeau, MO1144672577
  10. Nadeen AbusalimKansas City, MO1437030954

Common questions

What is Kay Lynn Day, FNP's NPI number?

Kay Lynn Day, FNP's National Provider Identifier (NPI) is 1063881019, issued on Sep 21, 2015. An NPI identifies a provider in billing; it is not a license.

Where is Kay Lynn Day, FNP located?

The NPPES record lists a practice address at 14400 Clayton RD, Ballwin, MO, 63011. Phone: (636) 207-1137. Providers update this record themselves, so call before visiting.

How can I verify Kay Lynn Day, FNP's license?

NPPES lists Missouri license number 2015033114, as entered by the provider. Search the Missouri board that licenses this profession; the NPPES record confirms identity only.

How much does Kay Lynn Day, FNP prescribe under Medicare Part D?

In 2024, Kay Lynn Day, FNP had 83 Medicare Part D claims for 52 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.