Robert Sitarz, MD
NPI 1831307677 · Diagnostic Radiology Physician · Thousand Oaks, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Sitarz, MD is a Diagnostic Radiology Physician provider in Thousand Oaks, CA (NPI 1831307677).
Provider details
- NPI number
- 1831307677
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
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
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
2,078 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) |
|---|---|---|
| Piflufolastat F-18, Diagnostic, 1 MillicurieA9595 | 450 | $649 |
| Nuclear Medicine Study From Skull Base to Mid-Thigh With Ct Scan78815 | 255 | $1,880 |
| Fluorodeoxyglucose F-18 Fdg, Diagnostic, Per Study Dose, Up to 45 MillicuriesA9552 | 235 | $360 |
| Ct Scan of Chest Without Contrast71250 | 174 | $149 |
| X-Ray of Chest, 2 Views71046 | 157 | $38 |
| Ct Scan of Abdomen and Pelvis Without Contrast74176 | 89 | $210 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-17
- Last updated
- 2018-07-12
Frequently asked questions
- What is Robert Sitarz's NPI number?
- Robert Sitarz's National Provider Identifier (NPI) is 1831307677, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Sitarz's specialty?
- Robert Sitarz is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Sitarz located?
- Robert Sitarz's practice location on file with NPPES is 415 Rolling Oaks Dr Ste 1601252, Thousand Oaks, CA 91361.
- What is Robert Sitarz's phone number?
- The practice phone number listed in the NPPES registry for Robert Sitarz is (805) 778-1521.
- Does Robert Sitarz accept Medicare?
- Robert Sitarz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Sitarz's NPI active?
- Yes — Robert Sitarz's NPI (1831307677) is active in the NPPES registry as of the last update on 2018-07-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.