Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MICHAEL O JOHNSON M.D.
NPI 1205874476
Internal Medicine - Critical Care Medicine in Saint Charles, MO

Q: What is Michael Johnson's NPI number?

The NPI number for Michael Johnson is 1205874476. It was assigned to this individual provider in the NPPES registry on June 2, 2006.

Q: What is Michael Johnson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.

Q: When was this NPI record last updated?

The NPPES record for Michael Johnson was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 25 days 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.

Active since June 02, 2006PECOS Enrolled

300 1ST CAPITOL DR, SAINT CHARLES, MO 63301(636) 947-5000 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Michael O Johnson M.d. NPPES

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

MICHAEL O JOHNSON M.D. (NPI 1205874476) is an individual critical care medicine provider in Saint Charles, Missouri, licensed in Missouri (R7N07) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1205874476

Entity TypeIndividualMale

Primary Taxonomy207RC0200X

Provider Legal NameMICHAEL O JOHNSONCredential: M.D.

Location Address300 1ST CAPITOL DRSaint Charles, MO 63301-2844

Mailing Address1836 Lackland Hill Pkwy, Attn: CredentialingSaint Louis, MO 63146-3572 · (314) 989-0300 · Fax (314) 810-1399

Phone(636) 947-5000

Sole ProprietorNo

Enumeration DateJune 2, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1205874476 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Critical Care MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207RC0200X

License✔ Licensed in MO · R7N07

Definition

An internist who diagnoses, treats and supports patients with multiple organ dysfunction. This specialist may have administrative responsibilities for intensive care units and may also facilitate and coordinate patient care among the primary physician, the critical care staff and other specialists.

300 1ST CAPITOL DR, Saint Charles, MO 63301

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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 (PECOS)

Michael O Johnson 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.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Critical care, first 30-74 minutes 99291

Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.

25 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63301 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

$128.28 typical visit price

range $55.65 – $169.38

Typical copayment $32.07 (range $13.91 – $42.34)

Most-billed visit code 99204

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 20

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

KATHLEEN F. CHRISTLIEB PA

Physician Assistant