Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher James Derrick Wallis, MD, PHD

Urology Physician in Nashville, TN · enumerated 2019.

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

National Provider Identifier

1356903652

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher James Derrick Wallis

Credential MD, PHD

Sex Male

Practice address 3601 the Vanderbilt Clinic, Nashville, TN, 37232

Phone (615) 936-2000

Enumeration date Jul 8, 2019

Last updated in NPPES Oct 21, 2020

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 58513 (TN) 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

How do I verify Christopher Wallis's NPI record?

Cross-check NPI 1356903652 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356903652 active?

Yes, as of the latest NPPES snapshot, NPI 1356903652 is active (record last updated 2020-10-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-21.