Mark Song MD PHD Inc
NPI 1205922531 · Nephrology Physician · Los Angeles, CA
Enrolled with Medicare as Part B Supplier - Clinic/Group Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Song MD PHD Inc is a Nephrology Physician organization in Los Angeles, CA (NPI 1205922531).
Provider details
- NPI number
- 1205922531
- Entity type
- Organization
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Mark Song, Physician Sole Owner(714) 626-0700
- License
- A49785 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-05
- Last updated
- 2011-12-14
Frequently asked questions
- What is Mark Song MD PHD Inc's NPI number?
- Mark Song MD PHD Inc's National Provider Identifier (NPI) is 1205922531, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mark Song MD PHD Inc?
- Mark Song MD PHD Inc is classified in the NPPES registry as Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Song MD PHD Inc located?
- Mark Song MD PHD Inc's practice location on file with NPPES is 3663 West 6th Street, Los Angeles, CA 90020.
- What is Mark Song MD PHD Inc's phone number?
- The practice phone number listed in the NPPES registry for Mark Song MD PHD Inc is (213) 736-1884.
- Does Mark Song MD PHD Inc accept Medicare?
- Mark Song MD PHD Inc is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Mark Song MD PHD Inc?
- The authorized official listed on Mark Song MD PHD Inc's NPPES record is Mark Song, Physician Sole Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mark Song MD PHD Inc's NPI active?
- Yes — Mark Song MD PHD Inc's NPI (1205922531) is active in the NPPES registry as of the last update on 2011-12-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.