Mark Clifton Ottoson, N.P.
Family Nurse Practitioner · Saint Helena, CA
Mark Clifton Ottoson, N.P. is a family nurse practitioner with a practice address in Saint Helena, California, and NPI 1083905103, issued on Apr 23, 2011. Check the license (California 429620, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Mark Clifton Ottoson
- Credential
- N.P.
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- 429620 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1370 Railroad Ave, Saint Helena, CA 94574
- Phone
- (707) 963-4399
- Enumerated
- Apr 23, 2011
- Record last updated
- Apr 23, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (707) 963-4796
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Verify Mark Clifton Ottoson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 429620Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Mark Clifton Ottoson among 16,966 family nurse practitioner records in California
Mark Clifton Ottoson, N.P. 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 not. Its NPI, issued in 2011, is newer than 19% of them.
- NPI issued2011 · 19% of these records are older, 79% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2011 · 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).
11 family nurse practitioner records list a practice address in Saint Helena
They are 11 of the 232 NPPES records with a practice address in Saint Helena, and 16,966 family nurse practitioner records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 16,966 in California → Every provider in Saint Helena → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Olivia DempsterSaint Helena, CA 945741265315618
- Jessica Friend, APRN, NP-CSaint Helena, CA 945741447911029
- Hillary HoppeSaint Helena, CA 945741720630049
- Marlene Lennon, FNP-CSaint Helena, CA 945741023089729
- Carolyn Pierce, NPSaint Helena, CA 945741003547928
- Daniel Schmitz, NPSaint Helena, CA 945741649826488
- Alexis Shiffer, NPSaint Helena, CA 945741063134831
- Melissa Toma, NURSE PRACTITIONERSaint Helena, CA 945741811694623
Common questions
What is Mark Clifton Ottoson, N.P.'s NPI number?
Mark Clifton Ottoson, N.P.'s National Provider Identifier (NPI) is 1083905103, issued on Apr 23, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Mark Clifton Ottoson, N.P. located?
The NPPES record lists a practice address at 1370 Railroad Ave, Saint Helena, CA, 94574. Phone: (707) 963-4399. Providers update this record themselves, so call before visiting.
How can I verify Mark Clifton Ottoson, N.P.'s license?
NPPES lists California license number 429620, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity 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. 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.