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KATHERINE MAY
NPI 1891599635
Physician Assistant in Saint Charles, MO

Active since April 02, 2025PECOS EnrolledAccepts Medicare Assignment
1475 KISKER RD STE 200, SAINT CHARLES, MO 63304(636) 498-5810 Get Directions Write a Review

NPPES record last updated: July 2, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 2, 2025, Apr 2, 2025 (2 updates tracked since 2025).

About Katherine May NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

KATHERINE MAY (NPI 1891599635) is an individual physician assistant in Saint Charles, Missouri, licensed in Missouri (2025011392) and active in the NPI registry since April 2025. She is enrolled in Medicare PECOS, is affiliated with Ssm St Joseph Health Center, and is a graduate of Saint Louis University School Of Medicine (2024).

NPPES Registry Identity

NPI1891599635
Entity TypeIndividualFemale
Primary Taxonomy363A00000X
Provider Legal NameKATHERINE MAY
Location Address1475 KISKER RD STE 200Saint Charles, MO 63304-8788
Mailing Address11590 Westpark Place Dr Apt KSaint Louis, MO 63146-3594
Phone(636) 498-5810
Sole ProprietorNo
Medical School CMSSaint Louis University School Of MedicineGraduated 2024
Enumeration DateApril 2, 2025
Last NPPES UpdateJuly 2, 20252 updates tracked since enumeration
NPPES CertifiedJuly 2, 2025
✔ NPI 1891599635 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363A00000X
License✔ Licensed in MO · 2025011392
Definition
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
Also ListedFamily MedicineTaxonomy 207Q00000X · License 2025011392 (MO)
1475 KISKER RD STE 200, Saint Charles, MO 63304
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Katherine May is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID446778435
PECOS Enrollment IDI20250513003743
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ssm St Joseph Health Center

Acute Care Hospitals · Saint Charles, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260005
Location300 1st Capitol DrSaint Charles, MO 63301 · St. Charles County
Emergency services

Ssm St Joseph Hospital West

Acute Care Hospitals · Lake Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number260200
Location100 Medical PlazaLake Saint Louis, MO 63367 · St. Charles County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63304 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
Established Patient
$69.50 typical visit price
range $17.76 – $137.92
Typical copayment $17.37 (range $4.44 – $34.48)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NICHOLAS MOORE M.D.
Family Medicine
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5810
ALANTE Q GHANNAM FNP
Nurse Practitioner (Family)
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 695-0325
JADE ISABELLA SADOFF PA-C
Physician Assistant
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5800
DR. KATHERINE M DEWEY M.D.
Obstetrics & Gynecology
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5870
MRS. MELANIE NICOLE PILKENTON PA-C
Physician Assistant
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5810
DEMETRIOS V POLITIS DO
Family Medicine
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5850
DR. NICOLE SEDDON MD
Family Medicine
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5810
PRIYA SADHU MD
Family Medicine
1475 KISKER RD STE 200
SAINT CHARLES, MO 63304
St. Charles County (636) 498-5810

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Katherine May's NPI number?

The NPI number for Katherine May is 1891599635. It was assigned to this individual provider in the NPPES registry on April 2, 2025.

Where is Katherine May located?

Katherine May practices at 1475 Kisker Rd Ste 200, Saint Charles, MO 63304. The listed phone number is (636) 498-5810.

What is Katherine May's specialty?

The primary specialty registered for this NPI is Physician Assistant with taxonomy code 363A00000X.

Is Katherine May enrolled in Medicare?

Yes. Katherine May is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Katherine May accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 other insurers list Katherine May as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Katherine May affiliated with any hospitals?

According to CMS data, Katherine May is affiliated with Ssm St Joseph Health Center and Ssm St Joseph Hospital West.

When was this NPI record last updated?

The NPPES record for Katherine May was last updated on July 2, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.