Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Julie Mak, MS, MSC

Genetic Counselor (M.S.) in San Francisco, CA · enumerated 2006.

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

National Provider Identifier

1417935602

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Registry record

Entity type Individual (Type 1)

Name Ms. Julie Mak

Credential MS, MSC

Sex Female

Practice address 1600 Divisadero St, Cancer Risk Program # 1714, San Francisco, CA, 94143

Phone (415) 885-7303

Enumeration date Jan 6, 2006

Last updated in NPPES Jun 21, 2013

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 specialty is Julie Mak?

Julie Mak is registered in NPPES with the primary taxonomy of Genetic Counselor (M.S.). 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 2013-06-21.