Carol Massmann, PNP
NPI 1598782013 · Nurse Practitioner · Saint Louis, MO
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carol Massmann, PNP is a Nurse Practitioner provider in Saint Louis, MO (NPI 1598782013).
Provider details
- NPI number
- 1598782013
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PNP
- Sex
- Female
- Sole proprietor
- No
- License
- 113735 (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
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
- 2006-07-17
- Last updated
- 2026-05-12
- Certified
- 2021-11-05
Frequently asked questions
- What is Carol Massmann's NPI number?
- Carol Massmann's National Provider Identifier (NPI) is 1598782013, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carol Massmann's specialty?
- Carol Massmann is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Carol Massmann located?
- Carol Massmann's practice location on file with NPPES is 1 Childrens Pl, Saint Louis, MO 63110-1002.
- What is Carol Massmann's phone number?
- The practice phone number listed in the NPPES registry for Carol Massmann is (314) 454-2683.
- Does Carol Massmann accept Medicare?
- Carol Massmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carol Massmann's NPI active?
- Yes — Carol Massmann's NPI (1598782013) is active in the NPPES registry as of the last update on 2026-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.