Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aron Mattson Muir Bruhn, M.D.

Urology Physician in New York, NY · enumerated 2007.

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

National Provider Identifier

1275732703

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Registry record

Entity type Individual (Type 1)

Name Dr. Aron Mattson Muir Bruhn

Credential M.D.

Sex Male

Practice address 550 1st Ave, New York, NY, 10016

Phone (212) 263-6378

Enumeration date Jul 14, 2007

Last updated in NPPES Dec 15, 2021

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 033878 (NY) 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
259026	Other	NY	NEW YORK MEDICAL LICENSE NUMBER

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

Is NPI 1275732703 active?

Yes, as of the latest NPPES snapshot, NPI 1275732703 is active (record last updated 2021-12-15).

How do I verify Aron Bruhn's NPI record?

Cross-check NPI 1275732703 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-15.