Mark Walsma, M.D.
NPI 1649295205 · Emergency Medicine Physician · Chesterfield, MO
Mark Walsma, M.D. is a Emergency Medicine Physician provider in Chesterfield, MO (NPI 1649295205).
Provider details
- NPI number
- 1649295205
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- R2D58 (MO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2006-07-13
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Walsma's NPI number?
- Mark Walsma's National Provider Identifier (NPI) is 1649295205, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Walsma's specialty?
- Mark Walsma is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Walsma located?
- Mark Walsma's practice location on file with NPPES is 232 S Woods Mill Rd, Chesterfield, MO 63017-3417.
- What is Mark Walsma's phone number?
- The practice phone number listed in the NPPES registry for Mark Walsma is (314) 205-6990.
- Is Mark Walsma's NPI active?
- Yes — Mark Walsma's NPI (1649295205) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.