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DR. MICHAEL G KOENIG M.D.
NPI 1720171093
Pediatrics in Saint Louis, MO

Active since October 01, 2006PECOS Enrolled
621 S NEW BALLAS RD STE 2003B, SAINT LOUIS, MO 63141(314) 251-5811(314) 251-5812 Get Directions Write a Review

NPPES record last updated: May 6, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: May 6, 2024, Nov 13, 2017, Jan 31, 2017 (3 updates tracked since 2017).

About Dr. Michael G Koenig M.d. NPPES

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

DR. MICHAEL G KOENIG M.D. (NPI 1720171093) is an individual pediatrics provider in Saint Louis, Missouri, licensed in Illinois (036136533) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in East Alton.

NPPES Registry Identity

NPI1720171093
Entity TypeIndividualMale
Primary Taxonomy208000000X
Provider Legal NameDR. MICHAEL G KOENIGCredential: M.D.
Location Address621 S NEW BALLAS RD STE 2003BSaint Louis, MO 63141-8265
Mailing AddressPo Box 776084Chicago, IL 60677-6084 · (314) 251-5811 · Fax (314) 251-5812
Phone(314) 251-5811
Fax(314) 251-5812
Sole ProprietorNo
Enumeration DateOctober 1, 2006
Last NPPES UpdateMay 6, 20243 updates tracked since enumeration
NPPES CertifiedMay 6, 2024
✔ NPI 1720171093 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatricsAllopathic & Osteopathic Physicians
Taxonomy Code208000000X
Licenses✔ Licensed in IL · 036136533✔ Licensed in MO · 2010003226
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.
Also ListedPediatrics · Pediatric PulmonologyTaxonomy 2080P0214X · License 2010003226 (MO)
621 S NEW BALLAS RD STE 2003B, Saint Louis, MO 63141
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Secondary Practice Location 1

Location 12 Terminal Dr Ste 8East Alton, IL 62024-2294 · Phone (618) 259-1419 · Fax (618) 259-1502

Other Identifiers 2

Medicaid1720171093MO
Medicaid2484440OH

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)

Dr. Michael G Koenig 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

3

Medicare enrollment records show Michael Koenig reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mercy Clinic East Communities
Same address
Family Medicine
615 S NEW BALLAS RD, ADMINISTRATION BUILDING, 5TH FLOOR
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 744 clinicians in this Medicare group
NPI 1043574940 (314) 251-6000
Carestl Health
4.7 mi
Federally Qualified Health Center (FQHC)
3312 ASHBY RD
Saint Ann, MO 63074
  • Reassigned Medicare billing, Missouri enrollment
  • 41 clinicians in this Medicare group
NPI 1245704220 (314) 493-6200
Ssm Health Care St. Louis
5.8 mi
Cardiovascular Disease
12303 DE PAUL DR
Bridgeton, MO 63044
  • Reassigned Medicare billing, Missouri enrollment
  • 741 clinicians in this Medicare group
NPI 1376598599 (314) 344-6000

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 63141 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

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

DR. CHELSEA ROSE DEL ROSSO MD
Pediatrics
621 S NEW BALLAS RD STE 2003B
SAINT LOUIS, MO 63141
St. Louis County (314) 251-5811

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 Michael Koenig's NPI number?

The NPI number for Michael Koenig is 1720171093. It was assigned to this individual provider in the NPPES registry on October 1, 2006.

Where is Michael Koenig located?

Michael Koenig practices at 621 S New Ballas Rd Ste 2003B, Saint Louis, MO 63141. The listed phone number is (314) 251-5811.

What is Michael Koenig's specialty?

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

Is Michael Koenig enrolled in Medicare?

Yes. Michael Koenig is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Michael Koenig's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Michael Koenig reassigns Medicare benefits to 3 organizations: Mercy Clinic East Communities (Saint Louis, MO), Carestl Health (Saint Ann, MO) and Ssm Health Care St. Louis (Bridgeton, 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 Michael Koenig's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Michael Koenig 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 2 other insurers list Michael Koenig 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 Michael Koenig was last updated on May 6, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.