Timothy Mason, MD
NPI 1366145583 · Internal Medicine Physician · Maywood, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Mason, MD is a Internal Medicine Physician provider in Maywood, IL (NPI 1366145583).
Provider details
- NPI number
- 1366145583
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2023-03-27
- Last updated
- 2023-06-12
- Certified
- 2023-06-12
Frequently asked questions
- What is Timothy Mason's NPI number?
- Timothy Mason's National Provider Identifier (NPI) is 1366145583, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Mason's specialty?
- Timothy Mason is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Mason located?
- Timothy Mason's practice location on file with NPPES is 2160 S 1st Ave, Maywood, IL 60153-3328.
- What is Timothy Mason's phone number?
- The practice phone number listed in the NPPES registry for Timothy Mason is (888) 584-7888.
- Does Timothy Mason accept Medicare?
- Timothy Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Mason's NPI active?
- Yes — Timothy Mason's NPI (1366145583) is active in the NPPES registry as of the last update on 2023-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.