Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Allen L. Johnson, MD

Internal Medicine Physician in Sedro Woolley, WA · enumerated 2006.

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

National Provider Identifier

1528035565

Verified

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Registry record

Entity type Individual (Type 1)

Name Allen L. Johnson

Credential MD

Sex Male

Practice address 1990 Hospital Dr, Suite 200, Sedro Woolley, WA, 98284

Phone (360) 856-4222

Fax (360) 854-2792

Enumeration date Mar 8, 2006

Last updated in NPPES Jul 14, 2015

Taxonomy & licenses

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License MD00031995 (WA) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD00031995 (WA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
8181331	Medicaid	WA	-
8205072	Medicaid	WA	-

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 NPI 1528035565 active?

Yes, as of the latest NPPES snapshot, NPI 1528035565 is active (record last updated 2015-07-14).

How do I verify Allen Johnson's NPI record?

Cross-check NPI 1528035565 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 →

Vanoy Smith Family Medicine Physician · Sedro Woolley, WA NPI 1538120407 Skagit Valley Medical Center, Inc Ps General Practice Physician · Sedro Woolley, WA NPI 1750596417 Skagit Valley Medical Center General Practice Physician · Sedro Woolley, WA NPI 1568677227 Angela Clements Physician Assistant · Sedro Woolley, WA NPI 1225369861 Peacehealth Medical Group - Sedro Woolley Family Medicine Physician · Sedro Woolley, WA NPI 1407283179 Physicians Care Family Medicine, Inc Ps Family Nurse Practitioner · Sedro Woolley, WA NPI 1588091045

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-07-14.