Maria Nelson, M.D.
NPI 1265783872 · Surgical Oncology Physician · Los Angeles, CA
Enrolled with Medicare as Practitioner - Surgical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Maria Nelson, M.D. is a Surgical Oncology Physician provider in Los Angeles, CA (NPI 1265783872).
Provider details
- NPI number
- 1265783872
- Entity type
- Individual
- Primary specialty
- Surgical Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A110435 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
13 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
470 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 220 | $37 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 125 | $62 |
| Partial Removal of Breast19301 | 29 | $688 |
| Imaging of Lymph Nodes During Surgery38900 | 19 | $138 |
| Biopsy Or Removal of Deep Lymph Nodes of Underarm38525 | 18 | $232 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$190 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
- 2012-09-21
- Last updated
- 2023-11-27
- Certified
- 2020-10-19
Frequently asked questions
- What is Maria Nelson's NPI number?
- Maria Nelson's National Provider Identifier (NPI) is 1265783872, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Maria Nelson's specialty?
- Maria Nelson is listed in the NPPES registry with a primary specialty of Surgical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Maria Nelson located?
- Maria Nelson's practice location on file with NPPES is 1450 San Pablo St Ste 6200, Los Angeles, CA 90033-5331.
- What is Maria Nelson's phone number?
- The practice phone number listed in the NPPES registry for Maria Nelson is (323) 442-9062.
- Does Maria Nelson accept Medicare?
- Maria Nelson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Maria Nelson's NPI active?
- Yes — Maria Nelson's NPI (1265783872) is active in the NPPES registry as of the last update on 2023-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.