KAREN CHEN M.D.
NPI 1598023103
Psychiatry & Neurology - Psychiatry in Costa Mesa, CA
About Karen Chen M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
KAREN CHEN M.D. (NPI 1598023103) is an individual psychiatry provider in Costa Mesa, California, licensed in California (A136429) and active in the NPI registry since May 2012. She is enrolled in Medicare PECOS and is a graduate of Georgetown University School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses
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
Karen Chen M.d. 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 Karen Chen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Costa Mesa, CA 92626
- Reassigned Medicare billing, California enrollment
- 279 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.
COSTA MESA, CA 92626
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 Karen Chen's NPI number?
The NPI number for Karen Chen is 1598023103. It was assigned to this individual provider in the NPPES registry on May 2, 2012.
Where is Karen Chen located?
Karen Chen practices at 2900 Bristol St Ste B201, Costa Mesa, CA 92626. The listed phone number is (855) 867-5551.
What is Karen Chen's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.
Is Karen Chen enrolled in Medicare?
Yes. Karen Chen 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 Karen Chen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Karen Chen reassigns Medicare benefits to Prohealth Partners A Medical Group Inc (Costa Mesa, 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 Karen Chen'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 Karen Chen was last updated on November 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.
# Karen Chen, M.D. · NPI 1598023103
Psychiatry physician in Costa Mesa, California. Individual provider, active in the CMS NPPES registry since May 2, 2012.
## Identity
- **NPI:** 1598023103 (Entity type: Individual)
- **Enumerated:** May 2, 2012
- **Primary specialty:** Psychiatry & Neurology - Psychiatry · taxonomy 2084P0800X
- **State license:** A136429 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2900 BRISTOL ST STE B201, Costa Mesa, CA 92626-5948
- **Phone:** (855) 867-5551
## 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:** Prohealth Partners A Medical Group Inc (NPI 1639613359, Costa Mesa, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 2012
## Record status
- **NPPES last updated:** November 25, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1598023103) · Data from the CMS NPPES public registry.