1. Home
  2. Directory
  3. Missouri
  4. Arnold
  5. Pediatrics
  6. NPI Profile

SHANNON MACGREGOR M.D.
NPI 1043662109
Pediatrics in Arnold, MO

Active since July 12, 2016PECOS Enrolled
148 RICHARDSON XING, ARNOLD, MO 63010(844) 853-8937 Get Directions Write a Review

NPPES record last updated: December 5, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 5, 2024, Jun 10, 2019, Jul 12, 2016 (3 updates tracked since 2016).

About Shannon Macgregor M.d. NPPES

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

SHANNON MACGREGOR M.D. (NPI 1043662109) is an individual pediatrics provider in Arnold, Missouri, licensed in Missouri (2019009751) and active in the NPI registry since July 2016. She is enrolled in Medicare PECOS and maintains a secondary practice location in Festus.

NPPES Registry Identity

NPI1043662109
Entity TypeIndividualFemale
Primary Taxonomy208000000X
Provider Legal NameSHANNON MACGREGORCredential: M.D.
Location Address148 RICHARDSON XINGArnold, MO 63010-6023
Mailing Address1800 CommunityClinton, MO 64735-8804
Phone(844) 853-8937
Sole ProprietorNo
Enumeration DateJuly 12, 2016
Last NPPES UpdateDecember 5, 20243 updates tracked since enumeration
NPPES CertifiedDecember 5, 2024
✔ NPI 1043662109 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
License✔ Licensed in MO · 2019009751
Definition
A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.
148 RICHARDSON XING, Arnold, MO 63010
Open in Google Maps ↗

Other Names 1

Former Name (1)Shannon Grosse Md

Secondary Practice Location 1

Location 11275 N Truman BlvdFestus, MO 63028-1176 · Phone (844) 853-8937

Accepted Insurance

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

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Shannon Macgregor M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignments

2

Medicare enrollment records show Shannon Macgregor reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Clinic East Communities
6.5 mi
Family Medicine
10004 KENNERLY RD STE 395B
Saint Louis, MO 63128
  • Reassigned Medicare billing, Missouri enrollment
  • 744 clinicians in this Medicare group
NPI 1720635329 (314) 849-3500
Compass Health, Inc.
36 mi
Federally Qualified Health Center (FQHC)
1032 CROSSWINDS CT
Wentzville, MO 63385
  • Reassigned Medicare billing, Missouri enrollment
  • 968 clinicians in this Medicare group
NPI 1861618308 (636) 332-8310

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63010 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
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
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 5

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

DR. JOHN LOUIS HEAFNER MD
Family Medicine
148 RICHARDSON XING
ARNOLD, MO 63010
Jefferson County (844) 853-8937
JESSICA LEE COLLINS PHD
Psychologist
148 RICHARDSON XING
ARNOLD, MO 63010
Jefferson County (844) 853-8937
COMPASS HEALTH, INC
Clinic/Center (Federally Qualified Health Center (FQHC))
148 RICHARDSON XING
ARNOLD, MO 63010
Jefferson County (844) 853-8937
MRS. KRISTI NICOLE MISCH FNP
Nurse Practitioner (Family)
148 RICHARDSON XING
ARNOLD, MO 63010
Jefferson County (844) 853-8937
YAMILES ENID RODRIGUEZ-CORREA PHD
Psychologist (Clinical)
148 RICHARDSON XING
ARNOLD, MO 63010
Jefferson County (844) 853-8937

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 Shannon Macgregor's NPI number?

The NPI number for Shannon Macgregor is 1043662109. It was assigned to this individual provider in the NPPES registry on July 12, 2016. The provider is also known as Shannon Grosse MD.

Where is Shannon Macgregor located?

Shannon Macgregor practices at 148 Richardson Xing, Arnold, MO 63010. The listed phone number is (844) 853-8937.

What is Shannon Macgregor's specialty?

The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.

Is Shannon Macgregor enrolled in Medicare?

Yes. Shannon Macgregor is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Shannon Macgregor's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Shannon Macgregor reassigns Medicare benefits to 2 organizations: Mercy Clinic East Communities (Saint Louis, MO) and Compass Health, Inc. (Wentzville, MO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Shannon Macgregor's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Shannon Macgregor accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Shannon Macgregor 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.

When was this NPI record last updated?

The NPPES record for Shannon Macgregor was last updated on December 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 22 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.