Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas Armstrong Ackerman, M.D.

Urology Physician in Clackamas, OR · enumerated 2006.

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

National Provider Identifier

1174636344

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas Armstrong Ackerman

Credential M.D.

Sex Male

Practice address 9900 Se Sunnyside Rd, Clackamas, OR, 97015

Phone (503) 652-2880

Enumeration date Aug 15, 2006

Last updated in NPPES Feb 4, 2022

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License MD00034742 (WA) Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License MD16033 (OR) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Douglas Ackerman?

Douglas Ackerman is registered in NPPES with the primary taxonomy of Urology 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 2022-02-04.