Marc Sizemore, FNP
Family Nurse Practitioner · Visalia, CA
Marc Sizemore, FNP is a family nurse practitioner with a practice address in Visalia, California, and NPI 1043419138, issued on Jul 17, 2007. Check the license (California 17384, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Marc Sizemore
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 17384 CA
Self-reported in NPPES; status is on the state search - Practice location
- 215 E Caldwell Ave, Visalia, CA 93277
- Phone
- (559) 622-9800
- Enumerated
- Jul 17, 2007
- Record last updated
- Dec 1, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (559) 622-9871
- Medicare enrollment
- Enrolled (PECOS I20071002000184); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 215 E Caldwell Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jon Knudsen, NPFamily Nurse Practitioner1871985333
- Kathleen Rooney, FNPFamily Nurse Practitioner1386084481
- Valerie Sizemore, NP-CNurse Practitioner1447261623
Verify Marc Sizemore in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 17384Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.7 times the Medicare Part D claims of the average family nurse practitioner in 2024
3,515 Medicare Part D claims for 412 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 124 claims were for opioids.
Most prescribed
- Atorvastatin Calcium156 claims
- Levothyroxine Sodium128 claims
- Omeprazole87 claims
- Alprazolam86 claims
- Pantoprazole Sodium86 claims
- Amlodipine Besylate84 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $680.20
36 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Immediate Care Medical Group Inc.Visalia, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marc Sizemore among 16,966 family nurse practitioner records in California
Marc Sizemore, FNP is one of 16,966 family nurse practitioner records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 7% of them.
- NPI issued2007 · 7% of these records are older, 87% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 40% of these records are
- Graduated2007 · median 2019 among the 6,793 with a school on file
- Record last updated2015 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
125 family nurse practitioner records list a practice address in Visalia
They are 125 of the 4,225 NPPES records with a practice address in Visalia, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in Visalia → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- So Yun AhnVisalia, CA 932771306248703
- Paul Campos, NPVisalia, CA 932771457664062
- Shawn Cardoza, N.PVisalia, CA 932771104937002
- San Juanita Castellano, FNPVisalia, CA 932771023440187
- Judy Clounch-Miyakawa, FNP/PAVisalia, CA 932771881685949
- Catherine GlasgowVisalia, CA 932771205228012
- Sukhpreet Kaur, FNPVisalia, CA 932771083951735
- Jon Knudsen, NPVisalia, CA 932771871985333
Common questions
What is Marc Sizemore, FNP's NPI number?
Marc Sizemore, FNP's National Provider Identifier (NPI) is 1043419138, issued on Jul 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marc Sizemore, FNP located?
The NPPES record lists a practice address at 215 E Caldwell Ave, Visalia, CA, 93277. Phone: (559) 622-9800. Providers update this record themselves, so call before visiting.
How can I verify Marc Sizemore, FNP's license?
NPPES lists California license number 17384, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Marc Sizemore, FNP prescribe under Medicare Part D?
In 2024, Marc Sizemore, FNP had 3,515 Medicare Part D claims for 412 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.