Helen Hyesung Ahn, LMFT
Marriage & Family Therapist · Pasadena, CA
Helen Hyesung Ahn, LMFT is a marriage & family therapist with a practice address in Pasadena, California, and NPI 1104076504, issued on Sep 23, 2008. Check the license (California 100494, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Helen Hyesung Ahn
- Credential
- LMFT
- Primary taxonomy
- Marriage & Family Therapist 106H00000X
- License number
- 100494 CA
Self-reported in NPPES; status is on the state search - Practice location
- 180 N Oakland Ave, Pasadena, CA 91101
- Phone
- (626) 584-5555
- Enumerated
- Sep 23, 2008
- Record last updated
- Aug 18, 2022
- Medicare enrollment
- Enrolled (PECOS I20240311002858); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest marriage & family therapist records → All 59,889 in California → Look up another NPI →
Also registered at 180 N Oakland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexis Abernethy, PHD, CGPClinical Psychologist1760933386
- Kelly AguirreMarriage & Family Therapist1982423380
- Jeffrey Bjorck, PH.D.Clinical Psychologist1154078962
- Warren Brown, M.D.Internal Medicine Physician1083776322
- Rosa ChoiStudent in an Organized Health Care Education/Training Program1053834770
- Ted Cosse, M.A.Psychologist1447480868
Verify Helen Hyesung Ahn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 100494Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Well Mental Health Counseling Licensed Clinical Social Worker IncLa Palma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Helen Hyesung Ahn among 59,889 marriage & family therapist records in California
Helen Hyesung Ahn, LMFT is one of 59,889 marriage & family therapist records with a practice address in California. 4% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 23% of them.
- NPI issued2008 · 23% of these records are older, 73% newer
- In a Medicare fileYes · 4% of these records are
- In the CMS Doctors and Clinicians fileYes · 8% of these records are
- Graduated2008 · median 2013 among the 4,574 with a school on file
- Record last updated2022 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 106H00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1,082 marriage & family therapist records list a practice address in Pasadena
They are 1,082 of the 10,525 NPPES records with a practice address in Pasadena, and 59,889 marriage & family therapist records in California.
All 59,889 in California → Every provider in Pasadena → Marriage & Family Therapist nationwide →
The 8 marriage & family therapist records with the nearest ZIP codes
- Denise Ballnik, LMFTPasadena, CA 911011164507851
- Dawn Bazler, LMFTPasadena, CA 911011477619773
- Eileen Beirich, MFTPasadena, CA 911011134138233
- Paula Denney, M.F.T.Pasadena, CA 911011467519090
- Norma Encarnacion, M.F.T.Pasadena, CA 911011992714646
- Richard Fraser, PHDPasadena, CA 911011194748970
- Eun Kyung Jin, MFTPasadena, CA 911011194747246
- Judith McCleese, MFTPasadena, CA 911011881750933
Common questions
What is Helen Hyesung Ahn, LMFT's NPI number?
Helen Hyesung Ahn, LMFT's National Provider Identifier (NPI) is 1104076504, issued on Sep 23, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Helen Hyesung Ahn, LMFT located?
The NPPES record lists a practice address at 180 N Oakland Ave, Pasadena, CA, 91101. Phone: (626) 584-5555. Providers update this record themselves, so call before visiting.
How can I verify Helen Hyesung Ahn, LMFT's license?
NPPES lists California license number 100494, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.