NPPES file of Aug 9, 2026

Mary Katherine Alexandra Spiker, PA-C

Physician Assistant · Louisville, KY

Mary Katherine Alexandra Spiker, PA-C is a physician assistant with a practice address in Louisville, Kentucky, and NPI 1124531793, issued on Nov 6, 2017. Check the license (Kentucky PA2308, as entered in NPPES) with the Kentucky 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1124531793
Name
Mary Katherine Alexandra Spiker
Credential
PA-C
Primary taxonomy
Physician Assistant 363A00000X
License number
PA2308 KY
Self-reported in NPPES; status is on the state search
Practice location
4950 Norton Healthcare Blvd Ste 205, Louisville, KY 40241
Phone
(502) 394-6390
Enumerated
Nov 6, 2017
Record last updated
Oct 27, 2020 (not updated in 6 years: call before relying on the address or phone)
Fax
(502) 394-6388
Medicare enrollment
Enrolled (PECOS I20171115003662); 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 4950 Norton Healthcare Blvd Ste 205

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

  1. Sarah HollowayAcute Care Nurse Practitioner1275147530
  2. Loretta Jophlin, MD, PHDGastroenterology Physician1477852101
  3. Abigail Rao, M.D.Neurological Surgery Physician1053636241

Verify Mary Katherine Alexandra Spiker in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Kentucky board licenses this profession
    Search for license PA2308
    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 Kentucky license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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88% fewer Medicare Part D claims than the average physician assistant in 2024

100 Medicare Part D claims for 44 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D.

  1. Mary Katherine Spiker100
  2. Specialty average830

Most prescribed

  1. Tamoxifen Citrate34 claims
  2. Anastrozole19 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.

The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualitynot scored (reweighted)
  2. Costnot scored (reweighted)
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

2 hospitals and group practices

  1. Norton Hospitals, IncLouisville, KY · Acute Care Hospitals2 of 5 stars
  2. Community Medical Associates IncLouisville, KY

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

Mary Katherine Alexandra Spiker among 1,958 physician assistant records in Kentucky

Mary Katherine Alexandra Spiker, PA-C is one of 1,958 physician assistant records with a practice address in Kentucky. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 50% of them.

  • NPI issued2017 · 50% of these records are older, 46% newer
  • In a Medicare fileYes · 76% of these records are
  • In the CMS Doctors and Clinicians fileYes · 62% of these records are
  • Graduated2017 · median 2018 among the 1,216 with a school on file
  • Record last updated2020 · 39% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

345 physician assistant records list a practice address in Louisville

They are 345 of the 21,891 NPPES records with a practice address in Louisville, and 1,958 physician assistant records in Kentucky.

The 8 physician assistant records with the nearest ZIP codes

  1. Melissa Davis, PA-CLouisville, KY 402411558557132
  2. James Gagel, PALouisville, KY 402411073518262
  3. Abigail Gardner, PA-CLouisville, KY 402411962768366
  4. Erin Gish, PALouisville, KY 402411770642001
  5. Emily Houston, PALouisville, KY 402411922347251
  6. Jason Hupp, PA-CLouisville, KY 402411770628745
  7. Jason Lemon, PALouisville, KY 402411518922129
  8. Elizabeth Morton, PA CLouisville, KY 402411538160957

Common questions

What is Mary Katherine Alexandra Spiker, PA-C's NPI number?

Mary Katherine Alexandra Spiker, PA-C's National Provider Identifier (NPI) is 1124531793, issued on Nov 6, 2017. An NPI identifies a provider in billing; it is not a license.

Where is Mary Katherine Alexandra Spiker, PA-C located?

The NPPES record lists a practice address at 4950 Norton Healthcare Blvd Ste 205, Louisville, KY, 40241. Phone: (502) 394-6390. Providers update this record themselves, so call before visiting.

How can I verify Mary Katherine Alexandra Spiker, PA-C's license?

NPPES lists Kentucky license number PA2308, as entered by the provider. Search the Kentucky board that licenses this profession; the NPPES record confirms identity only.

How much does Mary Katherine Alexandra Spiker, PA-C prescribe under Medicare Part D?

In 2024, Mary Katherine Alexandra Spiker, PA-C had 100 Medicare Part D claims for 44 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.

What is Mary Katherine Alexandra Spiker, PA-C's MIPS final score?

The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.

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.