MARK MYUNGJAE SONG MD, PHD
NPI 1326068560
Internal Medicine - Nephrology in Los Angeles, CA
About Mark Myungjae Song Md, Phd NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARK MYUNGJAE SONG MD, PHD (NPI 1326068560) is an individual nephrology provider in Los Angeles, California, licensed in California (A49785) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS and is a graduate of Other (1984).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mark Myungjae Song Md, Phd is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Mark Song reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Los Angeles, CA 90020
- Reassigned Medicare billing, California enrollment
- 2 clinicians in this Medicare group
Fullerton, CA 92833
- Reassigned Medicare billing, California enrollment
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 27
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 90020 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 19
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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Mark Song's NPI number?
The NPI number for Mark Song is 1326068560. It was assigned to this individual provider in the NPPES registry on July 20, 2006.
Where is Mark Song located?
Mark Song practices at 3663 W 6th St Ste 307, Los Angeles, CA 90020. The listed phone number is (213) 736-1884.
What is Mark Song's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.
Is Mark Song enrolled in Medicare?
Yes. Mark Song is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Mark Song's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mark Song reassigns Medicare benefits to 2 organizations: Mark Song MD Phd Inc (Los Angeles, CA) and Specialty Medical Center, Inc (Fullerton, 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 Mark Song'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 Mark Song was last updated on December 1, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.