Timothy O'Connor, MD
NPI 1639708290 · Hematology & Oncology Physician · Maywood, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy O'Connor, MD is a Hematology & Oncology Physician provider in Maywood, IL (NPI 1639708290).
Provider details
- NPI number
- 1639708290
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 125.076037 (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 tenure33% of score
6 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$232 across 5 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2020-04-06
- Last updated
- 2023-11-02
- Certified
- 2023-11-02
Frequently asked questions
- What is Timothy O'Connor's NPI number?
- Timothy O'Connor's National Provider Identifier (NPI) is 1639708290, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy O'Connor's specialty?
- Timothy O'Connor is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy O'Connor located?
- Timothy O'Connor's practice location on file with NPPES is 2160 S 1st Ave, Maywood, IL 60153-3328.
- What is Timothy O'Connor's phone number?
- The practice phone number listed in the NPPES registry for Timothy O'Connor is (888) 584-7888.
- Does Timothy O'Connor accept Medicare?
- Timothy O'Connor is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy O'Connor's NPI active?
- Yes — Timothy O'Connor's NPI (1639708290) is active in the NPPES registry as of the last update on 2023-11-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.