NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Martin Sadowski, M.D.

Neurology Physician in New York, NY · enumerated 2005.

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

National Provider Identifier

1407840127

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Martin Sadowski
Credential M.D.
Sex Male
Practice address 145 E 32nd St, New York, NY, 10016
Phone (212) 263-2152
Enumeration date Sep 8, 2005
Last updated in NPPES Mar 26, 2021

Taxonomy & licenses

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 224363 (NY) 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

Is NPI 1407840127 active?
Yes, as of the latest NPPES snapshot, NPI 1407840127 is active (record last updated 2021-03-26).
How do I verify Martin Sadowski's NPI record?
Cross-check NPI 1407840127 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-03-26.