Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Howard M Karp, DO

Nephrology Physician in Northfield, NJ · enumerated 2006.

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

National Provider Identifier

1619986841

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Registry record

Entity type Individual (Type 1)

Name Howard M Karp

Credential DO

Sex Male

Practice address 2605 Shore Rd, Northfield, NJ, 08225

Phone (609) 365-5300

Fax (609) 365-5301

Enumeration date Aug 5, 2006

Last updated in NPPES Nov 20, 2023

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 25MB02446200 (NJ) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 25MB02446200 (NJ) Secondary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
12760000	Medicaid	NJ	-

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 1619986841 active?

Yes, as of the latest NPPES snapshot, NPI 1619986841 is active (record last updated 2023-11-20).

How do I verify Howard Karp's NPI record?

Cross-check NPI 1619986841 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 2023-11-20.