Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Arielle Rose Effron

Obstetrics & Gynecology Physician in Washington, DC · enumerated 2018.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1821585118

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Registry record

Entity type Individual (Type 1)

Name Arielle Rose Effron

Sex Female

Practice address 2150 Pennsylvania Ave Nw, Washington, DC, 20037

Phone (202) 741-2500

Fax (202) 741-2550

Enumeration date Apr 23, 2018

Last updated in NPPES Jul 22, 2022

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License MD210002654 (DC) Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Arielle Effron's NPI record?

Cross-check NPI 1821585118 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821585118 active?

Yes, as of the latest NPPES snapshot, NPI 1821585118 is active (record last updated 2022-07-22).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-22.