Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Mark Kenneth Ryan, CRNP MSN

Family Nurse Practitioner in Laurel, DE · enumerated 2006 · practices at Tidalhealth Physician Network, Inc..

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

National Provider Identifier

1669447637

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Registry record

Entity type Individual (Type 1)

Name Mr. Mark Kenneth Ryan

Credential CRNP MSN

Sex Male

Practice address 30549 Sussex Hwy, Laurel, DE, 19956

Phone (302) 715-5214

Fax (302) 628-6855

Enumeration date Feb 22, 2006

Last updated in NPPES Feb 29, 2016

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License AC000091 (MD) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License AC000091 (MD) Secondary

363LF0000X Family Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License LG-0000752 (DE) Primary

Other identifiers

Identifier	Type	State	Issuer
403638700	Medicaid	MD	-

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.

Read the full guide → Validate an NPI →

Frequently asked questions

Is NPI 1669447637 active?

Yes, as of the latest NPPES snapshot, NPI 1669447637 is active (record last updated 2016-02-29).

How do I verify Mark Ryan's NPI record?

Cross-check NPI 1669447637 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 →

Joseph Kim Family Medicine Physician · Laurel, DE NPI 1114965167 Sandra Mancilla Family Medicine Physician · Laurel, DE NPI 1033247325 Donna Hitchens Nurse Practitioner · Laurel, DE NPI 1710229711 Kristi Nichols Family Nurse Practitioner · Laurel, DE NPI 1841683844 Conor Mclaughlin Family Nurse Practitioner · Laurel, DE NPI 1326559980 Tidalhealth Physician Network, Inc. Family Medicine Physician · Laurel, DE NPI 1205649514

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-02-29.