Stephannie Siwik-Simpson, NP
NPI 1578272597 · Adult Health Nurse Practitioner · Greenwich, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephannie Siwik-Simpson, NP is a Adult Health Nurse Practitioner provider in Greenwich, NY (NPI 1578272597).
Provider details
- NPI number
- 1578272597
- Entity type
- Individual
- Primary specialty
- Adult Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 310919 (NY)
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 tenure25% of score
3 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
356 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 | 200 | $71 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 95 | $55 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 31 | $13 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 16 | $7 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 14 | $89 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 142 | 55 |
| Atorvastatin Calcium | 117 | 39 |
| Fluticasone Propionate | 90 | 51 |
| Lisinopril | 89 | 29 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 80 | 20 |
| Amlodipine Besylate | 78 | 26 |
| Sertraline Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$210 across 11 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
- 2022-11-17
- Last updated
- 2023-08-24
- Certified
- 2023-08-22
Frequently asked questions
- What is Stephannie Siwik-Simpson's NPI number?
- Stephannie Siwik-Simpson's National Provider Identifier (NPI) is 1578272597, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephannie Siwik-Simpson's specialty?
- Stephannie Siwik-Simpson is listed in the NPPES registry with a primary specialty of Adult Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephannie Siwik-Simpson located?
- Stephannie Siwik-Simpson's practice location on file with NPPES is 1134 Ny State Route 29, Greenwich, NY 12834.
- What is Stephannie Siwik-Simpson's phone number?
- The practice phone number listed in the NPPES registry for Stephannie Siwik-Simpson is (185) 692-9861.
- Does Stephannie Siwik-Simpson accept Medicare?
- Stephannie Siwik-Simpson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephannie Siwik-Simpson's NPI active?
- Yes — Stephannie Siwik-Simpson's NPI (1578272597) is active in the NPPES registry as of the last update on 2023-08-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.