NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allergy & Asthma Center-Katz, M.D., Ltd.

Allergy & Immunology Physician in Las Vegas, NV · enumerated 2008 · authorized official Jason Bellak, Owner.

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

National Provider Identifier

1285807537

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Allergy & Asthma Center-Katz, M.D., Ltd.
Other name <Unavail>
Practice address 2625 Box Canyon Dr, Las Vegas, NV, 89128
Phone (702) 360-6100
Fax (702) 360-8096
Enumeration date Apr 8, 2008
Last updated in NPPES Jul 7, 2026

Taxonomy & classification

207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians Primary
261QM2500X Medical Specialty Clinic/Center Ambulatory Health Care Facilities · License 8163 (NV) Secondary

Authorized official

Name Jason Bellak
Title Owner
Phone (702) 360-6100

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

Who is the authorized official for Allergy & Asthma Center-Katz, M.D., Ltd.?
NPPES lists Jason Bellak (Owner) as the authorized official for this organization.
What is the NPI number for Allergy & Asthma Center-Katz, M.D., Ltd.?
The NPI for Allergy & Asthma Center-Katz, M.D., Ltd. is 1285807537, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

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