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Cristian Zhang Xu, M.D.

Sleep Medicine (Internal Medicine) Physician in Middletown, DE · enumerated 2022.

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

National Provider Identifier

1376287987

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Registry record

Entity type Individual (Type 1)
Name Cristian Zhang Xu
Credential M.D.
Sex Male
Practice address 209 E Main St Ste 3, Middletown, DE, 19709
Phone (302) 464-3967
Fax (302) 464-3968
Enumeration date Apr 21, 2022
Last updated in NPPES May 13, 2026

Taxonomy & licenses

207RS0012X Sleep Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License C1-0029358 (DE) Primary
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 Cristian Zhang Xu practice?
The practice location on file with NPPES is in Middletown, DE. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Cristian Zhang Xu?
The National Provider Identifier (NPI) for Cristian Zhang Xu is 1376287987, 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 2026-05-13.