Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Melissa Diane Ryan, D.C.
Chiropractor in Crystal Lake, IL · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1366887721
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Registry record
Entity type Individual (Type 1)
Name Dr. Melissa Diane Ryan
Credential D.C.
Sex Female
Practice address 405 E Congress Pkwy Ste C, Crystal Lake, IL, 60014
Phone (815) 356-1705
Fax (815) 526-3058
Enumeration date Apr 30, 2013
Last updated in NPPES Apr 30, 2013
Taxonomy & licenses
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders.
About the DC 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
Is NPI 1366887721 active?
Yes, as of the latest NPPES snapshot, NPI 1366887721 is active (record last updated 2013-04-30).
How do I verify Melissa Ryan's NPI record?
Cross-check NPI 1366887721 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → Laura Crane Chiropractor · Crystal Lake, IL NPI 1104090661 Northwest Pain Management Center Ltd Chiropractor · Crystal Lake, IL NPI 1881081420 Patricia Waskowiak Family Nurse Practitioner · Crystal Lake, IL NPI 1336821537 Midwest Wellness Healthcare General Practice Physician · Crystal Lake, IL NPI 1801759980
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-04-30.