Johnson Mao, M.D.
NPI 1538107321 belongs to Johnson Mao, M.D., a specialist with a practice location in Chicago, IL. The NPI was issued on June 3, 2006, and the record was last updated in NPPES on July 13, 2026.
Taxonomies and licenses
| Taxonomy | Code | License |
|---|---|---|
| Specialist Primary | 174400000X | 36050106 (IL) |
Practice location
Local context
Active NPPES records list 1,091 providers with specialist as the primary taxonomy within 25 miles of this practice location's ZIP code, 467 of them within 10 miles.
The same primary taxonomy is listed by 2,010 in Illinois and 89,616 nationwide.
These are counts from NPPES records, not a ranking or recommendation. Distances are measured between ZIP code centers, not street addresses.
Record history
- Name on record
- Dr. Johnson Mao
- Status
- Active
- NPI issued
- Last updated in NPPES
Is this your record? Updates are made through NPPES, the official National Plan and Provider Enumeration System.
NPPES data as of · Source: CMS NPPES
Building software? Fetch this NPI programmatically with the NPILayer Provider API.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://api.npilayer.com/v1/providers/1538107321"