Joseph Mason, MD
NPI 1396858296 · Psychiatry Physician · Chicago, IL
Joseph Mason, MD is a Psychiatry Physician provider in Chicago, IL (NPI 1396858296).
Provider details
- NPI number
- 1396858296
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 036-065073 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
Mailing address
Registry dates
- Enumerated
- 2006-08-16
- Last updated
- 2021-04-27
- Certified
- 2021-04-27
Frequently asked questions
- What is Joseph Mason's NPI number?
- Joseph Mason's National Provider Identifier (NPI) is 1396858296, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Mason's specialty?
- Joseph Mason is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Mason located?
- Joseph Mason's practice location on file with NPPES is 938 W Nelson St, Chicago, IL 60657-6704.
- What is Joseph Mason's phone number?
- The practice phone number listed in the NPPES registry for Joseph Mason is (773) 296-3220.
- Is Joseph Mason's NPI active?
- Yes — Joseph Mason's NPI (1396858296) is active in the NPPES registry as of the last update on 2021-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.