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MS. NINA MESADIEU NP
NPI 1336642180
Nurse Practitioner - Primary Care in Washington, DC

Active since March 16, 2018PECOS Enrolled
1525 14TH ST NW, WASHINGTON, DC 20005(202) 745-7000 Get Directions Write a Review

NPPES record last updated: December 14, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Dec 14, 2021, Apr 15, 2019, Mar 17, 2018 (3 updates tracked since 2018).

About Ms. Nina Mesadieu Np NPPES

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

MS. NINA MESADIEU NP (NPI 1336642180) is an individual primary care provider in Washington, District Of Columbia, licensed in District Of Columbia (RN1052079) and active in the NPI registry since March 2018. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1336642180
Entity TypeIndividualFemale
Primary Taxonomy363LP2300X
Provider Legal NameMS. NINA MESADIEUCredential: NP
Location Address1525 14TH ST NWWashington, DC 20005-3706
Mailing Address6438 Castlefin WayAlexandria, VA 22315-5549 · (312) 420-3688
Phone(202) 745-7000
Sole ProprietorNo
Enumeration DateMarch 16, 2018
Last NPPES UpdateDecember 14, 20213 updates tracked since enumeration
NPPES CertifiedDecember 14, 2021
✔ NPI 1336642180 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Practitioner · Primary CarePhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP2300X
Licenses✔ Licensed in DC · RN1052079✔ Licensed in VA · 0024175981
Also ListedNurse Practitioner · FamilyTaxonomy 363LF0000X · License RN1052079 (DC)
1525 14TH ST NW, Washington, DC 20005
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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)

Ms. Nina Mesadieu Np is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 Reassignments

2

Medicare enrollment records show Nina Mesadieu reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Us Helping Us, People Into Living, Inc.
1.7 mi
Clinical
3636 GEORGIA AVE NW
Washington, DC 20010
  • Reassigned Medicare billing, District of Columbia enrollment
  • 4 clinicians in this Medicare group
NPI 1497925697 (202) 446-1100
Inova Health Care Services
11 mi
Internal Medicine
3300 GALLOWS RD, PHYSICIAN SERVICES
Falls Church, VA 22042
  • Reassigned Medicare billing, District of Columbia enrollment
  • 2,618 clinicians in this Medicare group
NPI 1952320061 (703) 321-2627

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 20005 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
$100.31 typical visit price
range $65.18 – $194.86
Typical copayment $25.07 (range $16.29 – $48.71)
Most-billed visit code 99203
Established Patient
$113.72 typical visit price
range $21.40 – $158.88
Typical copayment $28.43 (range $5.35 – $39.72)
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.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

EFFIE D MARVRAY
Case Management
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 745-6196
WHITMAN-WALKER CLINIC INC.
Pharmacy (Community/Retail Pharmacy)
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 745-6135
MRS. LYNSAY ALYSSA MACLAREN EHUI PA
Physician Assistant (Medical)
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 797-3530
JAMILAH BOWDEN
Case Management
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 207-2366
PAUL ROBERT ELSASSER LICSW
Social Worker (Clinical)
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 939-7670
CHLOE GROSS
Registered Nurse
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 745-7000
MS. ELIZABETH LAMME
Advanced Practice Midwife
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 207-2440
ALEX DIBBLEE RN
Registered Nurse
1525 14TH ST NW
WASHINGTON, DC 20005
District of Columbia (202) 745-7000

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 Nina Mesadieu's NPI number?

The NPI number for Nina Mesadieu is 1336642180. It was assigned to this individual provider in the NPPES registry on March 16, 2018.

Where is Nina Mesadieu located?

Nina Mesadieu practices at 1525 14th St NW, Washington, DC 20005. The listed phone number is (202) 745-7000.

What is Nina Mesadieu's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Primary Care, with taxonomy code 363LP2300X.

Is Nina Mesadieu enrolled in Medicare?

Yes. Nina Mesadieu is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Nina Mesadieu's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nina Mesadieu reassigns Medicare benefits to 2 organizations: Us Helping Us, People Into Living, Inc. (Washington, DC) and Inova Health Care Services (Falls Church, VA). Each 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 Nina Mesadieu'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 Nina Mesadieu was last updated on December 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.