William Schnarr, MD
NPI 1982643185 · Pulmonary Disease Physician · Saint Charles, MO
William Schnarr, MD is a Pulmonary Disease Physician provider in Saint Charles, MO (NPI 1982643185).
Provider details
- NPI number
- 1982643185
- Entity type
- Individual
- Primary specialty
- Pulmonary Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- License
- 33507 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-05
- Last updated
- 2025-09-11
Frequently asked questions
- What is William Schnarr's NPI number?
- William Schnarr's National Provider Identifier (NPI) is 1982643185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Schnarr's specialty?
- William Schnarr is listed in the NPPES registry with a primary specialty of Pulmonary Disease Physician (Allopathic & Osteopathic Physicians).
- Where is William Schnarr located?
- William Schnarr's practice location on file with NPPES is 300 1st Capitol Dr, Saint Charles, MO 63301-2844.
- What is William Schnarr's phone number?
- The practice phone number listed in the NPPES registry for William Schnarr is (636) 947-5000.
- Is William Schnarr's NPI active?
- Yes — William Schnarr's NPI (1982643185) is active in the NPPES registry as of the last update on 2025-09-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.