Mary O'Connor, ARNP
NPI 1255303756 · Family Nurse Practitioner · Zearing, IA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary O'Connor, ARNP is a Family Nurse Practitioner provider in Zearing, IA (NPI 1255303756).
Provider details
- NPI number
- 1255303756
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- ARNP
- Sex
- Female
- Sole proprietor
- No
- License
- A097778 (IA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
20 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 164 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 487 | 88 |
| Gabapentin | 321 | 57 |
| Furosemide | 270 | 61 |
| Pantoprazole Sodium | 265 | 74 |
| Lisinopril | 252 | 54 |
| Atorvastatin Calcium | 246 | 66 |
| Famotidine | 237 | 66 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$82 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
Additional practice locations (1)
- 920 S Oak StIowa Falls, IA 50126-9506Phone: (641) 648-7000Fax: (641) 648-7093
Registry dates
- Enumerated
- 2006-02-07
- Last updated
- 2023-06-26
- Certified
- 2023-06-26
Frequently asked questions
- What is Mary O'Connor's NPI number?
- Mary O'Connor's National Provider Identifier (NPI) is 1255303756, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary O'Connor's specialty?
- Mary O'Connor is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mary O'Connor located?
- Mary O'Connor's practice location on file with NPPES is 112 W Main St, Zearing, IA 50278-7728.
- What is Mary O'Connor's phone number?
- The practice phone number listed in the NPPES registry for Mary O'Connor is (641) 487-7800.
- Does Mary O'Connor accept Medicare?
- Mary 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 Mary O'Connor's NPI active?
- Yes — Mary O'Connor's NPI (1255303756) is active in the NPPES registry as of the last update on 2023-06-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.