Robert Hesselgesser, MD
NPI 1710979687 · Radiation Oncology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Hesselgesser, MD is a Radiation Oncology Physician provider in Orange, CA (NPI 1710979687).
Provider details
- NPI number
- 1710979687
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 4301115702 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
2,331 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) |
|---|---|---|
| Radiation Treatment Delivery,3 Or More Separate Treatment Areas, Custom Blocking, Tangential Ports, Wedges, Rotational Beam, Compensators, Electron Beam; 6-10 MevG6012 | 657 | $269 |
| Stereoscopic X-Ray Guidance for Localization of Target Volume for the Delivery of Radiation TherapyG6002 | 474 | $86 |
| Design and Construction of Complex Radiation Treatment Device77334 | 175 | $140 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 152 | $201 |
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 139 | $125 |
| Intensity Modulated Treatment Delivery, Single Or Multiple Fields/Arcs,via Narrow Spatially and Temporally Modulated Beams, Binary, Dynamic Mlc, Per Treatment SessionG6015 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$304 across 4 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
Additional practice locations (1)
- 21300 Erwin StWoodland Hills, CA 91367-3717Phone: (818) 449-2700Fax: (818) 610-7461
Registry dates
- Enumerated
- 2005-08-17
- Last updated
- 2023-01-17
- Certified
- 2023-01-17
Frequently asked questions
- What is Robert Hesselgesser's NPI number?
- Robert Hesselgesser's National Provider Identifier (NPI) is 1710979687, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Hesselgesser's specialty?
- Robert Hesselgesser is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Hesselgesser located?
- Robert Hesselgesser's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Robert Hesselgesser's phone number?
- The practice phone number listed in the NPPES registry for Robert Hesselgesser is (714) 880-7812.
- Does Robert Hesselgesser accept Medicare?
- Robert Hesselgesser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Hesselgesser's NPI active?
- Yes — Robert Hesselgesser's NPI (1710979687) is active in the NPPES registry as of the last update on 2023-01-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.