Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Christopher Ryan Aldridge, M.D.

Surgery Physician in Alton, IL · enumerated 2007.

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

National Provider Identifier

1104026707

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Registry record

Entity type Individual (Type 1)

Name Dr. Christopher Ryan Aldridge

Credential M.D.

Sex Male

Practice address 4 Memorial Dr Ste 230, Alton, IL, 62002

Phone (618) 463-7833

Enumeration date Jul 20, 2007

Last updated in NPPES May 15, 2023

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 036.130520 (IL) 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Christopher Aldridge?

Christopher Aldridge is registered in NPPES with the primary taxonomy of Surgery Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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David Riedel Gastroenterology Physician · Alton, IL NPI 1073505004 Ajitesh Rai Neurology Physician · Alton, IL NPI 1205883097 Mohammad Sajed Neurology Physician · Alton, IL NPI 1396785127 Mark Klucka Family Medicine Physician · Alton, IL NPI 1801902432 Michael Liu Neurology Physician · Alton, IL NPI 1851402721 Wael Girgis Endocrinology, Diabetes & Metabolism Physician · Alton, IL NPI 1508053802 Tammy Vandermolen Family Nurse Practitioner · Alton, IL NPI 1588853741 Ann Laney Audiologist · Alton, IL NPI 1497904213

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-15.