Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christiaan P Hallman, M.D.

Dermatology Physician in Pasadena, CA · enumerated 2005.

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

National Provider Identifier

1154313732

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Registry record

Entity type Individual (Type 1)

Name Christiaan P Hallman

Credential M.D.

Sex Male

Practice address 800 Fairmount Ave, Suite 310, Pasadena, CA, 91105

Phone (626) 795-2007

Fax (626) 795-2012

Enumeration date Aug 18, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License A54658 (CA) 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 is the NPI number for Christiaan Hallman?

The National Provider Identifier (NPI) for Christiaan Hallman is 1154313732, a Type 1 (individual) record in the CMS NPPES registry.

Where does Christiaan Hallman practice?

The practice location on file with NPPES is in Pasadena, CA. 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 2007-07-08.