David Ereso Chayawatna, FNP-C
Nurse Practitioner · Camarillo, CA
David Ereso Chayawatna, FNP-C is a nurse practitioner with a practice address in Camarillo, California, and NPI 1457913485, issued on Jun 29, 2019. Check the license (California 95011991, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- David Ereso Chayawatna
- Credential
- FNP-C
- Primary taxonomy
- Nurse Practitioner 363L00000X
- License number
- 95011991 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2620 Las Posas RD, Camarillo, CA 93010
- Phone
- (805) 383-2109
- Enumerated
- Jun 29, 2019
- Record last updated
- Apr 27, 2026
- Medicare enrollment
- Enrolled (PECOS I20230621000874); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nurse practitioner records → All 8,223 in California → Look up another NPI →
Also registered at 2620 Las Posas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stephanie Lee, MDFamily Medicine Physician1922561901
- Gary Lieb, M.D.Internal Medicine Physician1912935396
Verify David Ereso Chayawatna in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 95011991Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
25% fewer Medicare Part D claims than the average nurse practitioner in 2024
829 Medicare Part D claims for 215 beneficiaries, against an average of 1,109 among the 54,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Glipizide113 claims
- Jardiance108 claims
- Metformin Hcl Er79 claims
- Insulin Glargine-Yfgn70 claims
- Humulin N Kwikpen66 claims
- Metformin Hcl66 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupOxnard, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
David Ereso Chayawatna among 8,223 nurse practitioner records in California
David Ereso Chayawatna, FNP-C is one of 8,223 nurse practitioner records with a practice address in California. 65% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 61% of them.
- NPI issued2019 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2018 · median 2017 among the 3,425 with a school on file
- Record last updated2026 · 45% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nurse Practitioner providers in California
There are 8,223 nurse practitioner records in California.
All 8,223 in California → Every provider in Camarillo → Nurse Practitioner nationwide →
The 8 nurse practitioner records with the nearest ZIP codes
- Sara Crawford, AGACNP-BCCamarillo, CA 930101033758503
- Lindsey FergusonCamarillo, CA 930101235779075
- Sheila GeronimoCamarillo, CA 930101609415322
- Allison HanCamarillo, CA 930101386513075
- Riza Malana, MSN, FNP- BC, FNP- CCamarillo, CA 930101477141711
- Mary NolascoCamarillo, CA 930101902792245
- Griselda BeauvaisVentura, CA 930091184481335
- Gassia AshikianCamarillo, CA 930121225951262
Common questions
What is David Ereso Chayawatna, FNP-C's NPI number?
David Ereso Chayawatna, FNP-C's National Provider Identifier (NPI) is 1457913485, issued on Jun 29, 2019. An NPI identifies a provider in billing; it is not a license.
Where is David Ereso Chayawatna, FNP-C located?
The NPPES record lists a practice address at 2620 Las Posas RD, Camarillo, CA, 93010. Phone: (805) 383-2109. Providers update this record themselves, so call before visiting.
How can I verify David Ereso Chayawatna, FNP-C's license?
NPPES lists California license number 95011991, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does David Ereso Chayawatna, FNP-C prescribe under Medicare Part D?
In 2024, David Ereso Chayawatna, FNP-C had 829 Medicare Part D claims for 215 beneficiaries; the average among nurse practitioner prescribers was 1,109. 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.