Sierra Mazzarella, CRNP
NPI 1588431381 · Family Nurse Practitioner · West Chester, PA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sierra Mazzarella, CRNP is a Family Nurse Practitioner provider in West Chester, PA (NPI 1588431381).
Provider details
- NPI number
- 1588431381
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- CRNP
- Sex
- Female
- Sole proprietor
- No
- License
- SP028771 (PA)
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
2 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
410 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 115 | $112 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 96 | $146 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical Decision Making, If Using Time, 30 Minutes Or More99203 | 46 | $98 |
| Automated Urinalysis Test81003 | 36 | $2 |
| Detection Test By Immunoassay With Direct Visual Observation for Influenza Virus87804 | 34 | $16 |
| Detection Test By Immunoassay With Direct Visual Observation for Severe Acute Respiratory Syndrome Coronavirus 2 (covid-19)87811 |
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 | 42 | 42 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 35 | 34 |
| Cefdinir | 25 | 25 |
| Methylprednisolone | 22 | 21 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 21 | 19 |
| Doxycycline Hyclate | 18 | 18 |
| Ofloxacin | 17 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-12-11
- Last updated
- 2023-12-11
- Certified
- 2023-12-11
Frequently asked questions
- What is Sierra Mazzarella's NPI number?
- Sierra Mazzarella's National Provider Identifier (NPI) is 1588431381, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sierra Mazzarella's specialty?
- Sierra Mazzarella is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Sierra Mazzarella located?
- Sierra Mazzarella's practice location on file with NPPES is 510 E Gay St, West Chester, PA 19380-2799.
- What is Sierra Mazzarella's phone number?
- The practice phone number listed in the NPPES registry for Sierra Mazzarella is (484) 999-0204.
- Does Sierra Mazzarella accept Medicare?
- Sierra Mazzarella is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sierra Mazzarella's NPI active?
- Yes — Sierra Mazzarella's NPI (1588431381) is active in the NPPES registry as of the last update on 2023-12-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.