Independent US Healthcare Provider Directory & Public Medical Database
Active NPI 1598782013 Individual Practitioner Female Practitioner

Carol V Massmann , PNP

Nurse Practitioner • Saint Louis, MO

Public Directory Information & Medical Disclaimer

This profile is compiled from official public domain records provided by CMS and the NPPES registry. TRUE-MEDINFO is an independent reference directory and does not provide medical advice, diagnosis, or treatment recommendations. Always consult a licensed medical professional for personal health decisions.

Professional Overview & Biography Verified Profile Summary

Carol Massmann, PNP is a registered healthcare professional specializing in Nurse Practitioner in Saint Louis, MO. Official NPI practice address is registered at 1 CHILDRENS PL.

Practice Location & Contact Primary Location

Practice Address

1 Childrens Pl
Div Ped Newborn Medicine

Saint Louis, MO 631101002

Telephone 3144542683
Fax 3144544633
Associated Practice Facility / Clinic
🏢 Washington University Facility NPI 1194765685

Specialty Benchmarks & Practice Insights

Comparative analytics for Nurse Practitioner in Saint Louis, MO

Active Practitioner
Practitioner Clinical Experience
Active
City Avg: 11.6 Yrs
State Avg: 11.7 Yrs
Regional Practice Density
442 Specialists

Practicing in Saint Louis, MO (1750 Statewide)

Telehealth Adoption Rate
14.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount
67.4% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Medical Specialties & State Licenses

CMS Verified: 2021-11-05
Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

State License MO 113735

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners
Dr. Brian Saville , MD

Pediatrics - Neonatal-Perinatal Medicine

NPI 1003834722

Doctor of Medicine (M.D.)

NPI 1013649177

Doctor of Medicine (M.D.)

Dr. Jagruti Anadkat , MD

Pediatrics - Neonatal-Perinatal Medicine

NPI 1023288420

Doctor of Medicine (M.D.)

NPI 1043638737

Doctor of Medicine (M.D.), Master of Public Health

Dr. Joan Rosenbaum , MD

Pediatrics - Hospice and Palliative Medicine

NPI 1053339549

Doctor of Medicine (M.D.)

Dr. Barbara Cohlan , MD

Pediatrics - Neonatal-Perinatal Medicine

NPI 1063484616

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

10 Historical Events
📍
Updated Practice Location May 12, 2026

Registered at 1 CHILDRENS PL, DIV PED NEWBORN MEDICINE, SAINT LOUIS, MO 631101002 (Tel: 3144542683)

📍
Updated Business Mailing Address May 12, 2026

Registered at PO BOX 7412011, CHICAGO, IL 606742011 (Tel: 3144542683)

👤
Provider Name / Credentials Updated May 12, 2026

Recorded as CAROL MASSMANN, PNP

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) May 12, 2026

Nurse Practitioner (License #113735 in MO)

NPI Profile Active November 19, 2012

NPI status registered as active in NPPES database

📍
Updated Practice Location November 19, 2012

Registered at 1 CHILDRENS PL, STE 35, SAINT LOUIS, MO 631101002 (Tel: 3144546162)

📍
Updated Business Mailing Address November 19, 2012

Registered at 660 S EUCLID AVE, C B 8115, SAINT LOUIS, MO 631101010 (Tel: 3144546162)

👤
Provider Name / Credentials Updated November 19, 2012

Recorded as CAROL MASSMANN, CPNP

🎓
Medical Taxonomy / Specialty Registered (Primary Specialty) November 19, 2012

Nurse Practitioner (License #113735 in MO)

🟢
Initial NPI Registration & Enumeration July 17, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1598782013
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: July 17, 2006
Last Update: May 12, 2026
Sole Proprietor: No

Mailing Address

Po Box 7412011

Chicago, IL 606742011

Phone: 3144542683

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).
⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.