Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas Krefman, D.C.

Chiropractor in Chicago, IL · enumerated 2015.

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

National Provider Identifier

1609243310

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Registry record

Entity type Individual (Type 1)

Name Dr. Douglas Krefman

Credential D.C.

Sex Male

Practice address 922 W Diversey Pkwy, Chicago, IL, 60614

Phone (773) 529-0057

Enumeration date Aug 28, 2015

Last updated in NPPES Aug 28, 2015

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 038012867 (IL) 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

How do I verify Douglas Krefman's NPI record?

Cross-check NPI 1609243310 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1609243310 active?

Yes, as of the latest NPPES snapshot, NPI 1609243310 is active (record last updated 2015-08-28).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-08-28.