Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Harry A Derr III, D.C.

Chiropractor in Baltimore, MD · enumerated 2005.

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

National Provider Identifier

1881670230

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Registry record

Entity type Individual (Type 1)

Name Dr. Harry A Derr III

Credential D.C.

Sex Male

Practice address 220 W Cold Spring Ln, Baltimore, MD, 21210

Phone (443) 524-6600

Enumeration date Dec 19, 2005

Last updated in NPPES May 27, 2011

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License S03655 (MD) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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

What specialty is Harry Derr?

Harry Derr is registered in NPPES with the primary taxonomy of Chiropractor. 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 2011-05-27.