MS. HELEN HYESUNG AHN LMFT
NPI 1104076504
Marriage & Family Therapist in Pasadena, CA
About Ms. Helen Hyesung Ahn Lmft NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MS. HELEN HYESUNG AHN LMFT (NPI 1104076504) is an individual marriage & family therapist in Pasadena, California, licensed in California (100494) and active in the NPI registry since September 2008. She is enrolled in Medicare PECOS and is a graduate of Other (2008).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Ms. Helen Hyesung Ahn Lmft 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
2Medicare enrollment records show Helen Ahn reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
La Palma, CA 90623
- Reassigned Medicare billing, California enrollment
- 15 clinicians in this Medicare group
San Diego, CA 92101
- Reassigned Medicare billing, California enrollment
- 545 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.
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.
PASADENA, CA 91101
PASADENA, CA 91101
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 Helen Ahn's NPI number?
The NPI number for Helen Ahn is 1104076504. It was assigned to this individual provider in the NPPES registry on September 23, 2008. The provider is also known as Hye Sung Helen Ahn.
Where is Helen Ahn located?
Helen Ahn practices at 180 N Oakland Ave, Pasadena, CA 91101. The listed phone number is (626) 584-5555.
What is Helen Ahn's specialty?
The primary specialty registered for this NPI is Marriage & Family Therapist with taxonomy code 106H00000X.
Is Helen Ahn enrolled in Medicare?
Yes. Helen Ahn 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 Helen Ahn's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Helen Ahn reassigns Medicare benefits to 2 organizations: Well Mental Health Counseling Licensed Clinical Social Worker Inc (La Palma, CA) and Cyti Health PC (San Diego, 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 Helen Ahn'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 Helen Ahn was last updated on August 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Ms. Helen Hyesung Ahn, LMFT · NPI 1104076504
Marriage & Family Therapist provider in Pasadena, California. Individual provider, active in the CMS NPPES registry since September 23, 2008.
## Identity
- **NPI:** 1104076504 (Entity type: Individual)
- **Enumerated:** September 23, 2008
- **Primary specialty:** Marriage & Family Therapist · taxonomy 106H00000X
- **State license:** 100494 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 180 N OAKLAND AVE, Pasadena, CA 91101-1714
- **Phone:** (626) 584-5555
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Well Mental Health Counseling Licensed Clinical Social Worker Inc (NPI 1942080981, La Palma, CA); Cyti Health PC (NPI 1679172290, San Diego, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2008
## Record status
- **NPPES last updated:** August 18, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1104076504) · Data from the CMS NPPES public registry.