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MARISSA MARIE HARTMAN FNP
NPI 1619861721
Nurse Practitioner - Family in Slidell, LA

Active since June 04, 2025PECOS Enrolled
1389 LAKEWOOD DR STE B, SLIDELL, LA 70458(504) 919-3850 Get Directions Write a Review

NPPES record last updated: June 4, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Marissa Marie Hartman Fnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARISSA MARIE HARTMAN FNP (NPI 1619861721) is an individual family provider in Slidell, Louisiana, licensed in Louisiana (205508) and active in the NPI registry since June 2025. She is enrolled in Medicare PECOS and is a graduate of Other (2024).

NPPES Registry Identity

NPI1619861721
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameMARISSA MARIE HARTMANCredential: FNP
Location Address1389 LAKEWOOD DR STE BSlidell, LA 70458-3127
Mailing Address126 Dillon DrSlidell, LA 70461-4239 · (504) 919-3850
Phone(504) 919-3850
Sole ProprietorNo
Medical School CMSOtherGraduated 2024
Enumeration DateJune 4, 2025
NPPES CertifiedJune 4, 2025
✔ NPI 1619861721 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in LA · 205508
1389 LAKEWOOD DR STE B, Slidell, LA 70458
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Marie Hartman Fnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID8820581473
PECOS Enrollment IDI20251203001039
Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Marissa Hartman reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Dr Douglas Mehaffie MD LLC
32 mi
Urgent Care
148 WALL BLVD
Gretna, LA 70056
  • Reassigned Medicare billing, Louisiana enrollment
  • 13 clinicians in this Medicare group
NPI 1669409199 (504) 393-2775

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 70458 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$83.60 typical visit price
range $53.43 – $164.73
Typical copayment $20.90 (range $13.35 – $41.18)
Most-billed visit code 99203
Established Patient
$95.09 typical visit price
range $16.64 – $133.62
Typical copayment $23.77 (range $4.16 – $33.40)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Marissa Hartman's NPI number?

The NPI number for Marissa Hartman is 1619861721. It was assigned to this individual provider in the NPPES registry on June 4, 2025.

Where is Marissa Hartman located?

Marissa Hartman practices at 1389 Lakewood Dr Ste B, Slidell, LA 70458. The listed phone number is (504) 919-3850.

What is Marissa Hartman's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Marissa Hartman enrolled in Medicare?

Yes. Marissa Hartman is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Marissa Hartman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Hartman reassigns Medicare benefits to Dr Douglas Mehaffie MD LLC (Gretna, LA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Marissa Hartman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Marissa Hartman was last updated on June 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 17 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.