Quick answers
- Does Marc T. Sizemore accept Medicare assignment?
- Yes. Medicare's clinician data says Marc T. Sizemore 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 Marc T. Sizemore see?
- In 2024, CMS data shows 479 Original Medicare patients and 1,840 services for Marc T. Sizemore. This counts Original Medicare only and measures volume, not quality.
- What is Marc T. Sizemore's NPI number?
- 1043419138. 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 Marc T. Sizemore, 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 | 479 |
|---|---|
| Services billed to Medicare | 1,840 |
| Different services or procedures | 54 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)652 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)461 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)99 services
- Automated urinalysis test (81003)93 services
- Insertion of needle into vein for collection of blood sample (36415)69 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 cholesterol75%
- High blood pressure72%
- Arthritis43%
- Ischemic heart disease25%
- Diabetes24%
- Anxiety24%
Hospitals where Marc T. Sizemore works
Medicare's Facility Affiliation Data lists Marc T. Sizemore 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.
- Kaweah Health Medical CenterVisalia, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050057
Practice locations
Addresses where Marc T. Sizemore is enrolled with Medicare (CMS data updated October 2, 2026).
- 231 E Caldwell AveVisalia, CA 93277 (559) 622‑9800
Group practices
Medicare enrollment lists Marc T. Sizemore as a member of this group (CMS data updated October 2, 2026).
- Immediate Care Medical Group Inc.6 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Visalia
Clinicians with the same Medicare primary specialty in Visalia, CA — not a recommendation.
Other clinicians in Immediate Care Medical Group Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2007 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1043419138 |
| 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