Erin O'Tool, MD
NPI 1104050954 · Family Medicine Physician · Oak Creek, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erin O'Tool, MD is a Family Medicine Physician provider in Oak Creek, WI (NPI 1104050954).
Provider details
- NPI number
- 1104050954
- Entity type
- Individual
- Primary specialty
- Family 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 tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
152 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 68 | $121 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 56 | $122 |
| Administration of Influenza Virus VaccineG0008 | 17 | $30 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 11 | $169 |
Typical Medicare-allowed amounts for these services range $30–$169 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 111 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 610 | 169 |
| Lisinopril | 331 | 90 |
| Levothyroxine Sodium | 222 | 50 |
| Losartan Potassium | 213 | 61 |
| Amlodipine Besylate | 205 | 52 |
| Metformin Hcl | 178 | 52 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$19 across 1 record (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
- 2009-05-08
- Last updated
- 2016-01-05
Frequently asked questions
- What is Erin O'Tool's NPI number?
- Erin O'Tool's National Provider Identifier (NPI) is 1104050954, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erin O'Tool's specialty?
- Erin O'Tool is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Erin O'Tool located?
- Erin O'Tool's practice location on file with NPPES is 8825 S Howell Ave, Oak Creek, WI 53154-3760.
- What is Erin O'Tool's phone number?
- The practice phone number listed in the NPPES registry for Erin O'Tool is (414) 647-3920.
- Does Erin O'Tool accept Medicare?
- Erin O'Tool is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erin O'Tool's NPI active?
- Yes — Erin O'Tool's NPI (1104050954) is active in the NPPES registry as of the last update on 2016-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.