Marc Sizemore, FNP
NPI 1043419138 · Family Nurse Practitioner · Visalia, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Sizemore, FNP is a Family Nurse Practitioner provider in Visalia, CA (NPI 1043419138).
Provider details
- NPI number
- 1043419138
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 17384 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
18 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
1,486 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 652 | $77 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 461 | $110 |
| Automated Urinalysis Test81003 | 93 | $2 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 69 | $5 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 42 | $13 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 37 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 89 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 156 | 44 |
| Levothyroxine Sodium | 128 | 31 |
| Omeprazole | 87 | 26 |
| Alprazolam | 86 | 17 |
| Pantoprazole Sodium | 86 | 34 |
| Amlodipine Besylate | 84 | 26 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$680 across 36 records (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
- 2007-07-17
- Last updated
- 2015-12-01
Frequently asked questions
- What is Marc Sizemore's NPI number?
- Marc Sizemore's National Provider Identifier (NPI) is 1043419138, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Sizemore's specialty?
- Marc Sizemore is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marc Sizemore located?
- Marc Sizemore's practice location on file with NPPES is 215 E Caldwell Ave, Visalia, CA 93277-7605.
- What is Marc Sizemore's phone number?
- The practice phone number listed in the NPPES registry for Marc Sizemore is (559) 622-9800.
- Does Marc Sizemore accept Medicare?
- Marc Sizemore is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Sizemore's NPI active?
- Yes — Marc Sizemore's NPI (1043419138) is active in the NPPES registry as of the last update on 2015-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.