Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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Marissa Elizabeth Shearer, MSN, APRN, ACNP-BC

Individual provider Internal Medicine Physician · NPI 1447194782

Marissa Elizabeth Shearer, MSN, APRN, ACNP-BC is a Nurse Practitioner in Saint Louis, Missouri. Qualified in 2025, 1 year ago. Practices with SSM Health Care Group, a 923-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
1
Licensed in
MO
In the registry since
2026
Specialties on file
2
What do these letters mean?
MSN — Master of Science in Nursing
A graduate nursing degree, usually held alongside an advanced practice licence.
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

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Practice location Address checks out

1201 S Grand Blvd
Saint Louis, MO 63104-1016
Phone: (314) 607-8156
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 12303 De Paul Dr, Bridgeton, MO 63044-2512 — (314) 344-6000

Specialties & licences

Acute Care Nurse Practitioner (primary) Taxonomy 363LA2100X · Licence 2026007462 (MO)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2026007462 (MO)

Record details

NPI number1447194782
Entity typeIndividual (Type 1)
GenderFemale
Credentials MSN , APRN , ACNP-BC
Sole proprietorNo
NPI enumeratedApril 16, 2026
Last updated in NPPESApril 17, 2026
Certification dateApril 17, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2025 (1 years in practice)
Group practice Ssm Health Care Group — 923 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Colleagues at SSM Health Care Group

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 923 clinicians in the practice; 12 are shown here.

Other providers in Saint Louis