Colleen Claassen, M.D.
NPI 1053558932 · Neonatal-Perinatal Medicine Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Pediatric Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Colleen Claassen, M.D. is a Neonatal-Perinatal Medicine Physician provider in Saint Louis, MO (NPI 1053558932).
Provider details
- NPI number
- 1053558932
- Entity type
- Individual
- Primary specialty
- Neonatal-Perinatal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 2013021231 (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
17 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
- 2009-01-14
- Last updated
- 2021-01-15
- Certified
- 2021-01-15
Frequently asked questions
- What is Colleen Claassen's NPI number?
- Colleen Claassen's National Provider Identifier (NPI) is 1053558932, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Colleen Claassen's specialty?
- Colleen Claassen is listed in the NPPES registry with a primary specialty of Neonatal-Perinatal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Colleen Claassen located?
- Colleen Claassen's practice location on file with NPPES is 1465 S Grand Blvd, Saint Louis, MO 63104-1003.
- What is Colleen Claassen's phone number?
- The practice phone number listed in the NPPES registry for Colleen Claassen is (314) 577-5663.
- Does Colleen Claassen accept Medicare?
- Colleen Claassen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Colleen Claassen's NPI active?
- Yes — Colleen Claassen's NPI (1053558932) is active in the NPPES registry as of the last update on 2021-01-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.