Chelsea Masters, FNP-C
NPI 1639544737 · Family Nurse Practitioner · Saint Louis, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Chelsea Masters, FNP-C is a Family Nurse Practitioner provider in Saint Louis, MO (NPI 1639544737).
Provider details
- NPI number
- 1639544737
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP-C
- Sex
- Female
- Sole proprietor
- No
- License
- 2015013120 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 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
- 2015-12-01
- Last updated
- 2015-12-01
Frequently asked questions
- What is Chelsea Masters's NPI number?
- Chelsea Masters's National Provider Identifier (NPI) is 1639544737, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Chelsea Masters's specialty?
- Chelsea Masters is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Chelsea Masters located?
- Chelsea Masters's practice location on file with NPPES is 4400 Clayton Ave, Saint Louis, MO 63110-1624.
- What is Chelsea Masters's phone number?
- The practice phone number listed in the NPPES registry for Chelsea Masters is (314) 432-3600.
- Does Chelsea Masters accept Medicare?
- Chelsea Masters is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Chelsea Masters's NPI active?
- Yes — Chelsea Masters's NPI (1639544737) is active in the NPPES registry as of the last update on 2015-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.