Daniel O'Connor, M.D.
NPI 1952478927 · Occupational Medicine Physician · Brookfield, WI
Enrolled with Medicare as Practitioner - Preventive Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Daniel O'Connor, M.D. is a Occupational Medicine Physician provider in Brookfield, WI (NPI 1952478927).
Provider details
- NPI number
- 1952478927
- Entity type
- Individual
- Primary specialty
- Occupational Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 50669-20 (WI)
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
19 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.
$273 across 4 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
- 2006-11-28
- Last updated
- 2021-09-23
- Certified
- 2021-09-23
Frequently asked questions
- What is Daniel O'Connor's NPI number?
- Daniel O'Connor's National Provider Identifier (NPI) is 1952478927, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Daniel O'Connor's specialty?
- Daniel O'Connor is listed in the NPPES registry with a primary specialty of Occupational Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Daniel O'Connor located?
- Daniel O'Connor's practice location on file with NPPES is 2865 N Brookfield Rd, Brookfield, WI 53045-3026.
- What is Daniel O'Connor's phone number?
- The practice phone number listed in the NPPES registry for Daniel O'Connor is (608) 628-3690.
- Does Daniel O'Connor accept Medicare?
- Daniel 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 Daniel O'Connor's NPI active?
- Yes — Daniel O'Connor's NPI (1952478927) is active in the NPPES registry as of the last update on 2021-09-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.