Quick answers
- Does Marco Oliver D. Lopez accept Medicare assignment?
- Yes. Medicare's clinician data says Marco Oliver D. Lopez accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Marco Oliver D. Lopez see?
- In 2024, CMS data shows 12 Original Medicare patients and 15 services for Marco Oliver D. Lopez. This counts Original Medicare only and measures volume, not quality.
- What is Marco Oliver D. Lopez's NPI number?
- 1366856304. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Marco Oliver D. Lopez, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 12 |
|---|---|
| Services billed to Medicare | 15 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 52 |
Practice locations
Addresses where Marco Oliver D. Lopez is enrolled with Medicare (CMS data updated October 2, 2026).
- 1701 Ocean AveSan Francisco, CA 94112 (415) 452‑2200
- 368 Fell StSan Francisco, CA 94102 (415) 861‑0828
Group practices
Medicare enrollment lists Marco Oliver D. Lopez as a member of these groups (CMS data updated October 2, 2026).
- City and County of San Francisco365 clinicians in the group
- Progress Foundation3 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in San Francisco
Clinicians with the same Medicare primary specialty in San Francisco, CA — not a recommendation.
Other clinicians in City and County of San Francisco
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2015 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1366856304 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians