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

WILLIAM SCHNARR MD
NPI 1982643185
Internal Medicine - Pulmonary Disease in Saint Charles, MO

Active since June 05, 2006
300 1ST CAPITOL DR, SAINT CHARLES, MO 63301(636) 947-5000(636) 947-5090 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Jul 12, 2026, Sep 11, 2025 (3 updates tracked since 2025).

About William Schnarr Md NPPES

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

WILLIAM SCHNARR MD (NPI 1982643185) is an individual pulmonary disease provider in Saint Charles, Missouri, licensed in Missouri (33507) and active in the NPI registry since June 2006.

NPPES Registry Identity

NPI1982643185
Entity TypeIndividualMale
Primary Taxonomy207RP1001X
Provider Legal NameWILLIAM SCHNARRCredential: MD
Location Address300 1ST CAPITOL DRSaint Charles, MO 63301-2844
Mailing Address1836 Lackland Hill Pkwy, Attn: Credentialing OfficeSaint Louis, MO 63146-3572 · (314) 989-0300
Phone(636) 947-5000
Fax(636) 947-5090
Sole ProprietorNo
Enumeration DateJune 5, 2006
Last NPPES UpdateJuly 13, 20263 updates tracked since enumeration
✔ NPI 1982643185 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Pulmonary DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RP1001X
License✔ Licensed in MO · 33507
Definition
An internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex disorders of the lungs.
Also ListedInternal Medicine · Critical Care MedicineTaxonomy 207RC0200X · License 33507 (MO)
300 1ST CAPITOL DR, Saint Charles, MO 63301
Open in Google Maps ↗

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
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
JULIE L ROACH CRNA
Nurse Anesthetist, Certified Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 989-3000
DR. ROMEL IZQUIERDO-MALON M.D.
Internal Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 317-0600
RACHAEL KING RD
Dietitian, Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5156
ANGELA GLASS MSOTR/L
Occupational Therapist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
FRANK S CALANDRINO JR MD LLC
Internal Medicine (Pulmonary Disease)
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 330-8616
DR. DAVID N MAYWRIGHT PHARMD
Pharmacist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 541-9482
ANTHONY W JENNINGS M.D.
Emergency Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000

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 William Schnarr's NPI number?

The NPI number for William Schnarr is 1982643185. It was assigned to this individual provider in the NPPES registry on June 5, 2006.

Where is William Schnarr located?

William Schnarr practices at 300 1st Capitol Dr, Saint Charles, MO 63301. The listed phone number is (636) 947-5000.

What is William Schnarr's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.

When was this NPI record last updated?

The NPPES record for William Schnarr 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 37 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.