Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. David Joseph Ryan, M.D.
Surgery Physician in Geneva, IL · enumerated 2009.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1770718314
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Registry record
Entity type Individual (Type 1)
Name Dr. David Joseph Ryan
Credential M.D.
Sex Male
Practice address 351 Delnor Dr Ste 400, Geneva, IL, 60134
Phone (630) 668-0833
Fax (630) 208-4373
Enumeration date May 27, 2009
Last updated in NPPES Jun 30, 2021
Taxonomy & licenses
208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 125-055868 (IL) 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.
Frequently asked questions
What specialty is David Ryan?
David Ryan 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.
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.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-30.