Catherine Pieroni, FNP
NPI 1427278308 · Family Nurse Practitioner · Merrillville, IN
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Pieroni, FNP is a Family Nurse Practitioner provider in Merrillville, IN (NPI 1427278308).
Provider details
- NPI number
- 1427278308
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Female
- Sole proprietor
- No
- License
- 71001516A (IN)
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 tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
714 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 393 | $72 |
| Detection Test By Immunoassay Technique for Severe Acute Respiratory Syndrome Coronavirus and Influenza87428 | 99 | $69 |
| Automated Urinalysis Test81003 | 65 | $2 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 59 | $101 |
| Detection Test By Immunoassay With Direct Visual Observation for Streptococcus, Group a (strep)87880 | 42 | $16 |
| X-Ray of Chest, 2 Views71046 | 38 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 76 | 74 |
| Cephalexin | 66 | 60 |
| Doxycycline Monohydrate | 35 | 35 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 26 | 23 |
| Prednisone | 26 | 26 |
| Nirmatrelvir/Ritonavirbrand: Paxlovid | 25 | 25 |
| Fluconazole | 14 | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Catherine Pieroni's NPI number?
- Catherine Pieroni's National Provider Identifier (NPI) is 1427278308, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Pieroni's specialty?
- Catherine Pieroni is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Catherine Pieroni located?
- Catherine Pieroni's practice location on file with NPPES is 9247 Broadway, Merrillville, IN 46410-7018.
- What is Catherine Pieroni's phone number?
- The practice phone number listed in the NPPES registry for Catherine Pieroni is (219) 769-6970.
- Does Catherine Pieroni accept Medicare?
- Catherine Pieroni is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Pieroni's NPI active?
- Yes — Catherine Pieroni's NPI (1427278308) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.