Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark Douglas Johnson, M.D., MTM&H

Infectious Disease Physician in Wenatchee, WA · enumerated 2005.

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

National Provider Identifier

1033105788

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Douglas Johnson

Credential M.D., MTM&H

Sex Male

Practice address 933 Red Apple Rd, Wenatchee, WA, 98801

Phone (509) 665-6210

Fax (509) 667-3310

Enumeration date Sep 27, 2005

Last updated in NPPES Mar 12, 2018

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License MD60755882 (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
1033105788	Medicaid	WA	-
381440	Other	WA	LNI

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

What specialty is Mark Johnson?

Mark Johnson is registered in NPPES with the primary taxonomy of Infectious Disease 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-12.