Starleen Frousiakis, MD
NPI 1174907604 · Hospitalist Physician · Ventura, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Starleen Frousiakis, MD is a Hospitalist Physician provider in Ventura, CA (NPI 1174907604).
Provider details
- NPI number
- 1174907604
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A148279 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
415 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 146 | $80 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 127 | $120 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 85 | $118 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 57 | $174 |
Typical Medicare-allowed amounts for these services range $80–$174 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 45 | — |
| Atorvastatin Calcium | 37 | 14 |
| Furosemide | 26 | 14 |
| Ibuprofen | 26 | — |
| Diltiazem Hclbrand: Diltiazem 24hr Er (cd) | 23 | — |
| Valsartan | 23 | — |
| Gabapentin | 23 | — |
Practice location
Mailing address
Additional practice locations (1)
- 100 W California BlvdPasadena, CA 91105-3010Phone: (626) 397-5188
Registry dates
- Enumerated
- 2015-07-15
- Last updated
- 2019-05-24
Frequently asked questions
- What is Starleen Frousiakis's NPI number?
- Starleen Frousiakis's National Provider Identifier (NPI) is 1174907604, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Starleen Frousiakis's specialty?
- Starleen Frousiakis is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Starleen Frousiakis located?
- Starleen Frousiakis's practice location on file with NPPES is 147 N Brent St, Ventura, CA 93003-2809.
- What is Starleen Frousiakis's phone number?
- The practice phone number listed in the NPPES registry for Starleen Frousiakis is (805) 652-5011.
- Does Starleen Frousiakis accept Medicare?
- Starleen Frousiakis is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Starleen Frousiakis's NPI active?
- Yes — Starleen Frousiakis's NPI (1174907604) is active in the NPPES registry as of the last update on 2019-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.