TIMOTHY STEVEN MASON MD
NPI 1366145583
Internal Medicine in Maywood, IL

Q: What is Timothy Mason's NPI number?

The NPI number for Timothy Mason is 1366145583. It was assigned to this individual provider in the NPPES registry on March 27, 2023.

Q: What is Timothy Mason's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for Timothy Mason was last updated on June 12, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 27, 2023PECOS Enrolled

2160 S 1ST AVE, MAYWOOD, IL 60153(888) 584-7888 Get Directions Write a Review

NPPES record last updated: June 12, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jun 12, 2023, May 31, 2023, Mar 27, 2023 (3 updates tracked since 2023).

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About Timothy Steven Mason Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

TIMOTHY STEVEN MASON MD (NPI 1366145583) is an individual internal medicine provider in Maywood, Illinois, licensed in Illinois (125.081655) and active in the NPI registry since March 2023. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1366145583

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameTIMOTHY STEVEN MASONCredential: MD

Location Address2160 S 1ST AVEMaywood, IL 60153-3328

Mailing Address2160 S 1st AveMaywood, IL 60153-3328 · (888) 584-7888

Phone(888) 584-7888

Sole ProprietorNo

Enumeration DateMarch 27, 2023

Last NPPES UpdateJune 12, 20233 updates tracked since enumeration

NPPES CertifiedJune 12, 2023

✔ NPI 1366145583 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in IL · 125.081655

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

2160 S 1ST AVE, Maywood, IL 60153

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Timothy Steven Mason Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Timothy Mason reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Inpatient Consultants Of Illinois, P.C.

5.3 mi

Hospitalist

15 SALT CREEK LN, SUITE 111
Hinsdale, IL 60521

Reassigned Medicare billing, Illinois enrollment
108 clinicians in this Medicare group

NPI 1548442569 (630) 371-0133

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60153 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

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Radiology (Diagnostic Radiology)