Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Mary Maybell Schuessler, RN, FNP-C

Individual provider Medical-Surgical Registered Nurse · NPI 1154131548

Mary Maybell Schuessler, RN, FNP-C is a Nurse Practitioner in Johns Island, South Carolina. Qualified in 2024, 2 years ago. Practices with Onsite Mental Health, a 15-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in South Carolina.

Years since qualifying
2
Licensed in
SC
In the registry since
2025
Specialties on file
2
What do these letters mean?
RN — Registered Nurse
A licensed nurse who completed a nursing degree and passed the NCLEX-RN examination.
FNP-C — Family Nurse Practitioner, Certified
A family nurse practitioner certified by the AANP.

See every abbreviation used in this directory →

Practice location Address checks out

3647 Maybank Hwy
Johns Island, SC 29455-4825
Phone: (404) 877-8189
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 171 Ashley Ave, Charleston, SC 29425-8908 — (843) 792-1414

Specialties & licences

Primary Care Nurse Practitioner (primary) Taxonomy 363LP2300X · Licence 29480 (SC)
Medical-Surgical Registered Nurse Taxonomy 163WM0705X · Licence RN.279595 (SC)

Record details

NPI number1154131548
Entity typeIndividual (Type 1)
GenderFemale
Credentials RN , FNP-C
Sole proprietorNo
NPI enumeratedJanuary 8, 2025
Last updated in NPPESMay 1, 2025
Certification dateMay 1, 2025

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2024 (2 years in practice)
Group practice Onsite Mental Health — 15 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Other providers in Johns Island