Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Christopher Andrew Deffer, CGC

Genetic Counselor (M.S.) in Minneapolis, MN · enumerated 2017.

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

National Provider Identifier

1386153120

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Registry record

Entity type Individual (Type 1)

Name Christopher Andrew Deffer

Credential CGC

Sex Male

Practice address Minneapolis, MN, 55454

Phone (612) 273-2235

Enumeration date Sep 25, 2017

Last updated in NPPES Jul 21, 2022

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

170300000X Genetic Counselor (M.S.) Other Service Providers Primary

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 is the NPI number for Christopher Deffer?

The National Provider Identifier (NPI) for Christopher Deffer is 1386153120, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christopher Deffer practice?

The practice location on file with NPPES is in Minneapolis, MN. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.