Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Christopher Haas, M.D.

Urology Physician in Boston, MA · enumerated 2015.

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

National Provider Identifier

1730575309

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Registry record

Entity type Individual (Type 1)

Name Christopher Haas

Credential M.D.

Sex Male

Practice address 800 Washington St, Boston, MA, 02111

Phone (617) 636-5000

Enumeration date Apr 10, 2015

Last updated in NPPES May 8, 2023

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 294377 (MA) 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

Where does Christopher Haas practice?

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

What is the NPI number for Christopher Haas?

The National Provider Identifier (NPI) for Christopher Haas is 1730575309, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-05-08.