Siobhan Faenza, MD
NPI 1013477900 · Internal Medicine Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siobhan Faenza, MD is a Internal Medicine Physician provider in Phoenix, AZ (NPI 1013477900).
Provider details
- NPI number
- 1013477900
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 71133 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 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
577 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 | 167 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 141 | $86 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 80 | $6 |
| 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 | 65 | $16 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 32 | $152 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 68 | 26 |
| Amlodipine Besylate | 43 | 11 |
| Gabapentin | 36 | 17 |
| Levothyroxine Sodium | 31 | 17 |
| Metformin Hclbrand: Metformin Hcl Er | 28 | 11 |
| Rosuvastatin Calcium | 25 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-03-25
- Last updated
- 2023-09-19
- Certified
- 2023-09-19
Frequently asked questions
- What is Siobhan Faenza's NPI number?
- Siobhan Faenza's National Provider Identifier (NPI) is 1013477900, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siobhan Faenza's specialty?
- Siobhan Faenza is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Siobhan Faenza located?
- Siobhan Faenza's practice location on file with NPPES is 26224 N Tatum Blvd Ste 5, Phoenix, AZ 85050-7500.
- What is Siobhan Faenza's phone number?
- The practice phone number listed in the NPPES registry for Siobhan Faenza is (480) 882-7580.
- Does Siobhan Faenza accept Medicare?
- Siobhan Faenza is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siobhan Faenza's NPI active?
- Yes — Siobhan Faenza's NPI (1013477900) is active in the NPPES registry as of the last update on 2023-09-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.