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Johnson Mao, M.D.
NPI 1538107321 · Specialist · Chicago, IL
Johnson Mao, M.D. is a Specialist provider in Chicago, IL (NPI 1538107321).
Provider details
- NPI number
- 1538107321
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- 36050106 (IL)
Specialties & taxonomies
Other Service Providers
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
2506 N Clark St
#282
Chicago, IL 60614-1848
Phone: (312) 842-8210
Fax: (312) 842-8281
Street-level locationGet directions
Mailing address
2600 S Michigan Ave
Chicago, IL 60616-2857
Registry dates
- Enumerated
- 2006-06-03
- Last updated
- 2007-07-08
Frequently asked questions
- What is Johnson Mao's NPI number?
- Johnson Mao's National Provider Identifier (NPI) is 1538107321, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Johnson Mao's specialty?
- Johnson Mao is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Johnson Mao located?
- Johnson Mao's practice location on file with NPPES is 2506 N Clark St, Chicago, IL 60614-1848.
- What is Johnson Mao's phone number?
- The practice phone number listed in the NPPES registry for Johnson Mao is (312) 842-8210.
- Is Johnson Mao's NPI active?
- Yes — Johnson Mao's NPI (1538107321) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.