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

Dr. Brian Joseph Hasslinger, M.D.

Otolaryngic Allergy Physician in Cumberland, MD · enumerated 2006.

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

National Provider Identifier

1457380602

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Brian Joseph Hasslinger

Credential M.D.

Sex Male

Practice address Cumberland, MD, 21502

Phone (301) 723-4851

Enumeration date Jul 1, 2006

Last updated in NPPES May 28, 2025

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

Taxonomy & licenses

207YX0602X Otolaryngic Allergy Physician Allopathic & Osteopathic Physicians · License 0101236053 (VA) Secondary

207YX0602X Otolaryngic Allergy Physician Allopathic & Osteopathic Physicians · License D0039156 (MD) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
152991960	Medicaid	MD	-

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 Brian Hasslinger?

Brian Hasslinger is registered in NPPES with the primary taxonomy of Otolaryngic Allergy Physician. 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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-05-28.