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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Ashley Ryles Nicholson, MD

Emergency Medicine Physician in Washington, DC · enumerated 2010.

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

National Provider Identifier

1558688861

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Registry record

Entity type Individual (Type 1)
Name Dr. Ashley Ryles Nicholson
Credential MD
Sex Female
Practice address Washington, DC, 20037
Phone (202) 741-2904
Fax (202) 741-2921
Enumeration date Apr 26, 2010
Last updated in NPPES Jan 24, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License A151091 (CA) Primary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MT196762 (PA) Secondary
207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License MD041372 (DC) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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

Where does Ashley Nicholson practice?
The practice location on file with NPPES is in Washington, DC. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Ashley Nicholson?
The National Provider Identifier (NPI) for Ashley Nicholson is 1558688861, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-01-24.