NPI age
6 years
Enumerated 2020-04-01
● Active
Type 1 · Individual
DR. Joon Yong Moon, MD
Moon is 1 of 1 internal medicine providers in League City and 1 of 1318 in Texas.
Primary specialty
Internal Medicine
Plus 1 subspecialty
Licensed in
TX, MN
2 states
Status
Active
No deactivations on record
Last NPPES update
2026-03-19
Source: monthly bulk 2026-05
Sole proprietor
No
May be part of a larger org
How this provider compares
Across 1318 active internal medicine providers in Texas.
NPI age
6 years
↓ 12 yr below median (18 yr)
State licenses
2 states
Top 84% — 15% of peers are multi-state
Subspecialties
0
57% of peers hold subspecialties
NPI lifetime · 2020 → 2026
2020-04Enumerated in NPPES
2020
2026
Where they practice
Practice location
2660 Gulf Fwy S Ste 2
League City, TX 775736820
Mailing address
200 1st St Sw
Rochester, MN 559050001
Additional practice locations
2 secondary locations on file with NPPES.
Location 2
200 1st St Sw
Rochester, MN 559050001
Location 3
3500 Gaston Ave
Dallas, TX 752462017
Specialties
-
Internal Medicine PrimaryAn internist who treats diseases of the lungs and airways. The pulmonologist diagnoses and treats cancer, pneumonia, pleurisy, asthma, occupational and environmental diseases, bronchitis, sleep disorders, emphysema and other complex...
Practice context
Part of a multi-provider practice. 1 other active provider shares this practice address in NPPES.
Provyx · Custom healthcare lists
Need all 1318 Internal Medicine providers in Texas?
Get the full list as a CSV with verified work emails, direct phones, and LinkedIn URLs.
Request a quote →How to verify this provider
- Confirm the NPI on NPPES.The CMS registry is the system of record. Open NPPES →
- Check the state license is currently active.State licensing boards publish current status; NPPES does not.
- Confirm payer enrollment if billing.NPI presence does not guarantee active enrollment with Medicare, Medicaid, or commercial payers.