Zachary Zumsteg, M.D.
NPI 1962729004 · Radiation Oncology Physician · Sylmar, CA
Enrolled with Medicare as Practitioner - Radiation Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Zachary Zumsteg, M.D. is a Radiation Oncology Physician provider in Sylmar, CA (NPI 1962729004).
Provider details
- NPI number
- 1962729004
- Entity type
- Individual
- Primary specialty
- Radiation Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
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 tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,130 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) |
|---|---|---|
| Ct Guidance for Insertion of Radiation Therapy Fields77014 | 1,026 | $48 |
| Calculation of Radiation Therapy Dose77300 | 231 | $35 |
| Radiation Treatment Management, 5 Treatment Sessions77427 | 219 | $207 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 72 | $76 |
| Design and Construction of Radiation Treatment Device for High Precision Radiation Therapy77338 | 72 | $244 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 72 | $103 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$142 across 1 record (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
- 2010-04-29
- Last updated
- 2016-03-28
Frequently asked questions
- What is Zachary Zumsteg's NPI number?
- Zachary Zumsteg's National Provider Identifier (NPI) is 1962729004, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Zachary Zumsteg's specialty?
- Zachary Zumsteg is listed in the NPPES registry with a primary specialty of Radiation Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Zachary Zumsteg located?
- Zachary Zumsteg's practice location on file with NPPES is 14445 Olive View Dr., Sylmar, CA 91342.
- What is Zachary Zumsteg's phone number?
- The practice phone number listed in the NPPES registry for Zachary Zumsteg is (818) 364-1555.
- Does Zachary Zumsteg accept Medicare?
- Zachary Zumsteg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Zachary Zumsteg's NPI active?
- Yes — Zachary Zumsteg's NPI (1962729004) is active in the NPPES registry as of the last update on 2016-03-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.