Quick answers
- Does Caitlin A. Matsumoto accept Medicare assignment?
- Yes. Medicare's clinician data says Caitlin A. Matsumoto 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 Caitlin A. Matsumoto see?
- In 2024, CMS data shows 209 Original Medicare patients and 23,715 services for Caitlin A. Matsumoto. This counts Original Medicare only and measures volume, not quality.
- What is Caitlin A. Matsumoto's NPI number?
- 1295104602. 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 Caitlin A. Matsumoto, 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 | 209 |
|---|---|
| Services billed to Medicare | 23,715 |
| Different services or procedures | 60 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count (85025)339 services
- Insertion of needle into vein for collection of blood sample (36415)313 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)185 services
- Injection of drug or substance under skin or into muscle (96372)94 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)71 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 blood pressure75%
- High cholesterol74%
- Arthritis48%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)38%
- Diabetes37%
- Chronic kidney disease36%
Hospitals where Caitlin A. Matsumoto works
Medicare's Facility Affiliation Data lists Caitlin A. Matsumoto at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mercy General HospitalSacramento, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050017
- Mercy San Juan Medical CenterCarmichael, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050516
- Methodist Hospital of SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050590
- Sutter Medical Center, SacramentoSacramento, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050108
Practice locations
Addresses where Caitlin A. Matsumoto is enrolled with Medicare (CMS data updated October 2, 2026).
- 3939 J St, Suite 360Sacramento, CA 95819 (916) 736‑1536
- 6555 Coyle AveCarmichael, CA 95608 (916) 962‑1544
- 6555 Coyle Ave, Suite 301Carmichael, CA 95608
- 8100 Bruceville RdSacramento, CA 95823 (916) 689‑9300
Group practices
Medicare enrollment lists Caitlin A. Matsumoto as a member of this group (CMS data updated October 2, 2026).
- Sierra Hematology and Oncology Medical Centers16 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Sacramento
Clinicians with the same Medicare primary specialty in Sacramento, CA — not a recommendation.
Other clinicians in Sierra Hematology and Oncology Medical Centers
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2015 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1295104602 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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