Joyhan Sung, RRT-NPS
Joyhan Sung, RRT-NPS is a Neonatal/Pediatric Registered Respiratory Therapist in Harbor City, CA, registered under NPI 1003394685.
Getting there
Here is what surrounds this office in Harbor City, based on OpenStreetMap data collected Sep 10, 2026. Parking is available about 0.23 mi away. The nearest transit stop is 0.38 mi away, served by Vermont / Anaheim. A pharmacy sits 0.21 mi from the entrance (Rite Aid), which helps if you leave with a prescription.
Getting here and what is nearby
Parking 380 ft ~2 min
Restaurant Philipos Pizza & Pasta 661 ft ~3 min
1206 West Pacific Coast Highway, Harbor City 90710
Mo-Th 09:30-21:00; Fr 09:30-22:00; Sa 10:00-22:00; Su 11:00-21:00
Transit 871 ft ~4 min
Restaurant Warin Thai by JoJo & Mom's Thai Kitchen 0.20 mi ~4 min
1111 Pacific Coast Highway, Harbor City 90710-3544
Th-Tu 11:00-15:00,17:00-21:00
Pharmacy Rite Aid 0.21 mi ~5 min
West Pacific Coast Highway, Harbor City 90710
Parking 0.22 mi ~5 min
Parking 0.23 mi ~5 min
Transit 0.33 mi ~7 min
Transit Vermont / Anaheim 0.38 mi ~8 min
Restaurant Tacos Super Gallito 0.42 mi ~9 min
843 West Pacific Coast Highway, Harbor City 90710
Mo-Su 07:00-03:00
Convenience 7-Eleven 0.43 mi ~9 min
1202 West Anaheim Street, Harbor City 90710-3805
Distances are straight‑line estimates — walking routes may be longer. Hours and phone numbers can change; call ahead to confirm.
Credentials and Medicare
NPPES does not list a state licence number for this record. That is not unusual — organizations and some provider types are not required to file one. Verify current licensure with the relevant state board before care.
This NPI does not appear in the PECOS Medicare enrolment file. Providers who do not bill Medicare — or who bill only through a group's enrolment — will not appear here. It is not a sign of any problem with the registration.
What Neonatal/Pediatrics covers
The care and treatment of premature infants, newborns and children. This includes management of mechanical ventilation, assessment, diagnostics and generalized respiratory treatments. NUCC Health Care Provider Taxonomy, code 2279P3900X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1003394685 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | Aug 5, 2018 |
| Last updated | Aug 5, 2018 |
| Status | Active |
| Sole proprietor | No |
| Gender | Female |
| Credential | RRT-NPS |
| Practice address |
25825 VERMONT AVE Harbor City, CA 90710 (310) 517-2648 |
| Mailing address |
20335 ANZA AVE APT 13 Torrance, CA 90503 |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 0 | 0 | 3 | 3 | 9 | 4 | 6 | 8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 0 | 0 | 3 | 6 | 9 | 8 | 6 | 7 |
Sum = 65 · next multiple of 10 = 70 · check digit = 5 · actual last digit = 5
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.