Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Ashton Theobald, M.D.

Specialist in Edmonds, WA · enumerated 2006.

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

National Provider Identifier

1821047556

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Ashton Theobald

Credential M.D.

Sex Male

Practice address 21601 76th Ave W, Edmonds, WA, 98026

Phone (425) 640-4000

Enumeration date May 9, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD00011020 (WA) 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 Michael Theobald's NPI record?

Cross-check NPI 1821047556 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1821047556 active?

Yes, as of the latest NPPES snapshot, NPI 1821047556 is active (record last updated 2007-07-08).

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Andrea Ference Anesthesiology Physician · Edmonds, WA NPI 1417954173 Jeremy Hammel Emergency Medicine Physician · Edmonds, WA NPI 1962404798 Swedish Edmonds General Acute Care Hospital · Edmonds, WA NPI 1033107214 Phd#2 of Snohomish County Psychiatric Hospital Unit · Edmonds, WA NPI 1023006061 Josh Yi Hospitalist Physician · Edmonds, WA NPI 1821057290 Victoria Harris Forensic Psychiatry Physician · Edmonds, WA NPI 1689630014 Edmonds Anesthesia Associates Inc Ps Anesthesiology Physician · Edmonds, WA NPI 1578511267 Pamela Luttrell Family Nurse Practitioner · Edmonds, WA NPI 1386693232

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.