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

Dr. Jeffrey Karsdon, M.D.

Neonatal-Perinatal Medicine Physician in Baldwin, NY · enumerated 2008.

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

National Provider Identifier

1689843088

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey Karsdon

Credential M.D.

Sex Male

Practice address Baldwin, NY, 11510

Phone (516) 223-7915

Enumeration date Feb 29, 2008

Last updated in NPPES Nov 19, 2013

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

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 176309 (NY) Secondary

2080N0001X Neonatal-Perinatal Medicine Physician Allopathic & Osteopathic Physicians · License 176309 (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
01201770 046	Medicaid	NY	-
52128	Other	NY	BLUESHIELD/MEDICARE

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

How do I verify Jeffrey Karsdon's NPI record?

Cross-check NPI 1689843088 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1689843088 active?

Yes, as of the latest NPPES snapshot, NPI 1689843088 is active (record last updated 2013-11-19).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-11-19.