Andrew Mackay Williamson
Physician Assistant · Lenexa, KS
Andrew Mackay Williamson is a physician assistant with a practice address in Lenexa, Kansas, and NPI 1073104493, issued on Jan 28, 2021. Check the license (Kansas 2022029337, as entered in NPPES) with the Kansas board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Andrew Mackay Williamson
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 2022029337 KS
Self-reported in NPPES; status is on the state search - Practice location
- 23401 Prairie Star Pkwy Ste B-300, Lenexa, KS 66227
- Phone
- (913) 677-6319
- Enumerated
- Jan 28, 2021
- Record last updated
- Sep 4, 2023
- Fax
- (913) 677-1540
- Medicare enrollment
- Enrolled (PECOS I20231030001493); accepts Medicare assignment
- Medical or professional school
- University Of Missouri, Kansas City, School Of Medicine, 2022
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 1,329 in Kansas → Look up another NPI →
Also registered at 23401 Prairie Star Pkwy Ste B-300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Shelly Buse, PTPhysical Therapist1336363035
- Selena De Leon, APRN FNP-CNurse Practitioner1578234621
- Jason Douglas, PA-CPhysician Assistant1457606618
- Kelli Holloway, APRNFamily Nurse Practitioner1861219222
- Elizabeth Kelly, FNP-CFamily Nurse Practitioner1750037693
- Amanda Merino, DNPFamily Nurse Practitioner1720505167
Verify Andrew Mackay Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Kansas board licenses this profession
Search for license 2022029337Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
49% fewer Medicare Part D claims than the average physician assistant in 2024
426 Medicare Part D claims for 105 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 3% of claims. 73 claims were for opioids.
Most prescribed
- Pantoprazole Sodium126 claims
- Oxycodone Hcl71 claims
- Ondansetron Hcl59 claims
- Enoxaparin Sodium46 claims
- Famotidine27 claims
- Sucralfate22 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): 77.3 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.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $2,202.84
12 payments; by number, the most common kind was travel and lodging; the largest payer was Intuitive Surgical, Inc. The 64,719 providers of this specialty with any payment received $841.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Kansas University Physicians IncLenexa, KS
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Andrew Mackay Williamson among 1,329 physician assistant records in Kansas
Andrew Mackay Williamson is one of 1,329 physician assistant records with a practice address in Kansas. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 74% of them.
- NPI issued2021 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated2022 · median 2015 among the 868 with a school on file
- Record last updated2023 · 40% 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 Kansas practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
16 physician assistant records list a practice address in Lenexa
They are 16 of the 1,374 NPPES records with a practice address in Lenexa, and 1,329 physician assistant records in Kansas.
All 1,329 in Kansas → Every provider in Lenexa → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kirsten Delay-PapaShawnee, KS 662271770047672
- Jason Douglas, PA-CLenexa, KS 662271457606618
- Madison GarverLenexa, KS 662271508424185
- Jeffrey Turek, PA-CLenexa, KS 662271306256342
- Riley Zerr, PAShawnee, KS 662271356165062
- Carolyn Mense, PA-CShawnee, KS 662261568054757
- Jill Morton, PA-CShawnee, KS 662261770864894
- William Schmidt, PA-C, MPHShawnee, KS 662261194811620
Common questions
What is Andrew Mackay Williamson's NPI number?
Andrew Mackay Williamson's National Provider Identifier (NPI) is 1073104493, issued on Jan 28, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Andrew Mackay Williamson located?
The NPPES record lists a practice address at 23401 Prairie Star Pkwy Ste B-300, Lenexa, KS, 66227. Phone: (913) 677-6319. Providers update this record themselves, so call before visiting.
How can I verify Andrew Mackay Williamson's license?
NPPES lists Kansas license number 2022029337, as entered by the provider. Search the Kansas board that licenses this profession; the NPPES record confirms identity only.
How much does Andrew Mackay Williamson prescribe under Medicare Part D?
In 2024, Andrew Mackay Williamson had 426 Medicare Part D claims for 105 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Andrew Mackay Williamson's MIPS final score?
The 2023 MIPS final score is 77.3 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.