JUSTIN WU MARSON MD
NPI 1831650548
Dermatology - MOHS-Micrographic Surgery in Costa Mesa, CA
About Justin Wu Marson Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JUSTIN WU MARSON MD (NPI 1831650548) is an individual mohs-micrographic surgery provider in Costa Mesa, California, licensed in California (201566) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Rutgers R W Johnson Medical School (cam/new Bruns/pisc) (2019).
NPPES Registry Identity
Specialties & Licenses 2
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
Justin Wu Marson 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 Reassignment
Medicare enrollment records show Justin Marson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Los Angeles, CA 90017
- Reassigned Medicare billing, California enrollment
- 14 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92626 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 2
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 Justin Marson's NPI number?
The NPI number for Justin Marson is 1831650548. It was assigned to this individual provider in the NPPES registry on March 26, 2019.
Where is Justin Marson located?
Justin Marson practices at 3080 Bristol St Ste 650, Costa Mesa, CA 92626. The listed phone number is (949) 317-2558.
What is Justin Marson's specialty?
The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.
Is Justin Marson enrolled in Medicare?
Yes. Justin Marson 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 organization bills Medicare for Justin Marson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Justin Marson reassigns Medicare benefits to James Y. Wang, MD, Inc. (Los Angeles, CA). The 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 Justin Marson'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 Justin Marson was last updated on October 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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.
# Justin Wu Marson, MD · NPI 1831650548
MOHS-Micrographic Surgery physician in Costa Mesa, California. Individual provider, active in the CMS NPPES registry since March 26, 2019.
## Identity
- **NPI:** 1831650548 (Entity type: Individual)
- **Enumerated:** March 26, 2019
- **Primary specialty:** Dermatology - MOHS-Micrographic Surgery · taxonomy 207ND0101X
- **State license:** 201566 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3080 BRISTOL ST STE 650, Costa Mesa, CA 92626-7311
- **Phone:** (949) 317-2558 · **Fax:** (213) 408-4414
## 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:** James Y. Wang, MD, Inc. (NPI 1538640669, Los Angeles, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rutgers R W Johnson Medical School, class of 2019
## Record status
- **NPPES last updated:** October 1, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1831650548) · Data from the CMS NPPES public registry.