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

Individual provider Family Nurse Practitioner · NPI 1619861721

Marissa Marie Hartman, FNP is a Nurse Practitioner in Slidell, Louisiana. Qualified in 2024, 2 years ago. Practices with Dr Douglas Mehaffie MD LLC, an 18-clinician group and accepts Medicare assignment. Licensed in Louisiana.

Years since qualifying
2
Licensed in
LA
In the registry since
2025
What do these letters mean?
FNP — Family Nurse Practitioner
A nurse practitioner who treats patients of all ages, much like a family doctor.

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Practice location Address checks out

1389 Lakewood Dr Ste B
Slidell, LA 70458-3127
Phone: (504) 919-3850
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Nurse Practitioner (primary) Taxonomy 363LF0000X · Licence 205508 (LA)

Record details

NPI number1619861721
Entity typeIndividual (Type 1)
GenderFemale
Credentials FNP
Sole proprietorNo
NPI enumeratedJune 4, 2025
Last updated in NPPESJune 4, 2025
Certification dateJune 4, 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 Dr Douglas Mehaffie Md Llc — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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