DEREN MARK SINKOWITZ MD
NPI 1619957750
Internal Medicine - Pulmonary Disease in Torrance, CA
About Deren Mark Sinkowitz Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DEREN MARK SINKOWITZ MD (NPI 1619957750) is an individual pulmonary disease provider in Torrance, California, licensed in California (107553) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and is a graduate of New York Medical College (1983).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 6
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Deren Mark Sinkowitz Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Deren Sinkowitz reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Torrance, CA 90505
- Reassigned Medicare billing, California enrollment
- 16 clinicians in this Medicare group
Torrance, CA 90505
- Reassigned Medicare billing, California enrollment
- 388 clinicians in this Medicare group
Torrance, CA 90505
- Reassigned Medicare billing, California enrollment
- 106 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 6
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 90505 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 9
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TORRANCE, CA 90505
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Deren Sinkowitz's NPI number?
The NPI number for Deren Sinkowitz is 1619957750. It was assigned to this individual provider in the NPPES registry on January 17, 2006.
Where is Deren Sinkowitz located?
Deren Sinkowitz practices at 3701 Skypark Dr # 200, Torrance, CA 90505. The listed phone number is (310) 378-8900.
What is Deren Sinkowitz's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is Deren Sinkowitz enrolled in Medicare?
Yes. Deren Sinkowitz is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Deren Sinkowitz's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Deren Sinkowitz reassigns Medicare benefits to 3 organizations: Regents Of The University Of California (Torrance, CA), Torrance Health Association Inc (Torrance, CA) and Torrance Memorial Medical Center (Torrance, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Deren Sinkowitz's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Deren Sinkowitz was last updated on May 10, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Deren Mark Sinkowitz, MD · NPI 1619957750
Pulmonary Disease physician in Torrance, California. Individual provider, active in the CMS NPPES registry since January 17, 2006.
## Identity
- **NPI:** 1619957750 (Entity type: Individual)
- **Enumerated:** January 17, 2006
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** 107553 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3701 SKYPARK DR, # 200, Torrance, CA 90505-4753
- **Phone:** (310) 378-8900 · **Fax:** (310) 791-0786
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California (NPI 1366789307, Torrance, CA); Torrance Health Association Inc (NPI 1083903124, Torrance, CA); Torrance Memorial Medical Center (NPI 1477502797, Torrance, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York Medical College, class of 1983
## Record status
- **NPPES last updated:** May 10, 2013
- **Other identifiers:** Medicare UPIN A52607; Medicare PIN WG53821G (CA); Medicaid 1619957750 (CA); and 3 more
---
Source: [NPI Profile](https://npiprofile.com/npi/1619957750) · Data from the CMS NPPES public registry.