Quick answers
- Does Jessica K. Chan accept Medicare assignment?
- Yes. Medicare's clinician data says Jessica K. Chan 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 Jessica K. Chan see?
- In 2024, CMS data shows 127 Original Medicare patients and 411 services for Jessica K. Chan. This counts Original Medicare only and measures volume, not quality.
- What is Jessica K. Chan's NPI number?
- 1902211840. 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 Jessica K. Chan, 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 | 127 |
|---|---|
| Services billed to Medicare | 411 |
| Different services or procedures | 34 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Insertion of needle into vein for collection of blood sample (36415)149 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)34 services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)25 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)17 services
- Admn sarscov2 vacc 1 dose (90480)15 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol68%
- High blood pressure46%
- Arthritis31%
- Depression17%
- Anxiety17%
- Osteoporosis17%
Practice locations
Addresses where Jessica K. Chan is enrolled with Medicare (CMS data updated October 2, 2026).
- 2950 S Delaware St, Suite 150San Mateo, CA 94403 (888) 663‑6331
- 3885 24th StSan Francisco, CA 94114 (415) 529‑4522
- 559 Clay St, Suite 200San Francisco, CA 94111 (888) 663‑6331
Group practices
Medicare enrollment lists Jessica K. Chan as a member of this group (CMS data updated October 2, 2026).
- One Medical Group Inc331 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in San Mateo
Clinicians with the same Medicare primary specialty in San Mateo, CA — not a recommendation.
Other clinicians in One Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Midwestern University, Chicago College Of Osteopathic Med |
| Graduation year | 2014 (12 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902211840 |
| 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