Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Deren Mark Sinkowitz, MD

Pulmonary Disease Physician in Torrance, CA · enumerated 2006.

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

National Provider Identifier

1619957750

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Registry record

Entity type Individual (Type 1)

Name Deren Mark Sinkowitz

Credential MD

Sex Male

Practice address 3701 Skypark Dr, # 200, Torrance, CA, 90505

Phone (310) 378-8900

Fax (310) 791-0786

Enumeration date Jan 17, 2006

Last updated in NPPES May 10, 2013

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 107553 (CA) Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 107553 (CA) Secondary

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 107553 (CA) 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
00G538210	Medicaid	CA	-
1619957750	Medicaid	CA	-

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 is the NPI number for Deren Sinkowitz?

The National Provider Identifier (NPI) for Deren Sinkowitz is 1619957750, a Type 1 (individual) record in the CMS NPPES registry.

Where does Deren Sinkowitz practice?

The practice location on file with NPPES is in Torrance, CA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-05-10.