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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARISSA ELIZABETH FITLIN
NPI 1962098756
Physician Assistant - Medical in Washington, DC

Active since December 15, 2020PECOS Enrolled
900 23RD ST NW, WASHINGTON, DC 20037(202) 745-8000 Get Directions Write a Review

NPPES record last updated: July 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 27, 2026, Nov 15, 2023, Dec 6, 2022 and 1 more (4 updates tracked since 2020).

About Marissa Elizabeth Fitlin NPPES

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

MARISSA ELIZABETH FITLIN (NPI 1962098756) is an individual medical provider in Washington, District Of Columbia, licensed in District Of Columbia (PA200001677) and active in the NPI registry since December 2020. She is enrolled in Medicare PECOS and maintains a secondary practice location in Bethesda.

NPPES Registry Identity

NPI1962098756
Entity TypeIndividualFemale
Primary Taxonomy363AM0700X
Provider Legal NameMARISSA ELIZABETH FITLIN
Location Address900 23RD ST NWWashington, DC 20037-2342
Mailing Address900 23rd St NwWashington, DC 20037-2342 · (202) 745-8000
Phone(202) 745-8000
Sole ProprietorYes
Enumeration DateDecember 15, 2020
Last NPPES UpdateJuly 27, 20264 updates tracked since enumeration
NPPES CertifiedJuly 27, 2026
✔ NPI 1962098756 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPhysician Assistant · MedicalPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363AM0700X
License✔ Licensed in DC · PA200001677
Also ListedPhysician AssistantTaxonomy 363A00000X · License 0110008875 (VA)
900 23RD ST NW, Washington, DC 20037
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Secondary Practice Location 1

Location 18901 Wisconsin AveBethesda, MD 20889-1541 · Phone (301) 295-4810

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marissa Elizabeth Fitlin 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.

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.

DR. MUSTAFA BASSAM HAMMUDI MD
Internal Medicine
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-5109
DR. WILLIAM ANDREW HIATT MD
Student in an Organized Health Care Education/Training Program
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3000
DR. SHANE ZAMANI MD
Anesthesiology
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4750
MRS. KATHERINE CAROLINE FOX PA-C, MPH
Physician Assistant (Surgical)
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-5000
MICHAEL WILLIAM HELBIG MD
Student in an Organized Health Care Education/Training Program
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-3100
DR. AYAL ZEV PIERCE MD
Emergency Medicine
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4000
CALLIE BEEGLE PA-C
Physician Assistant
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 715-4000
MEGAN KATHLEEN DAILEY PA-C
Physician Assistant
900 23RD ST NW
WASHINGTON, DC 20037
District of Columbia (202) 741-2210

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 Fitlin's NPI number?

The NPI number for Marissa Fitlin is 1962098756. It was assigned to this individual provider in the NPPES registry on December 15, 2020.

Where is Marissa Fitlin located?

Marissa Fitlin practices at 900 23rd St NW, Washington, DC 20037. The listed phone number is (202) 745-8000.

What is Marissa Fitlin's specialty?

The primary specialty registered for this NPI is Physician Assistant, specializing in Medical, with taxonomy code 363AM0700X.

Is Marissa Fitlin enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Marissa Fitlin was last updated on July 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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.