David Ereso Chayawatna, FNP-C
- Part D claims, 2024
- 829
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2019
- Practice address
- 2103 E Gonzales Rd, Oxnard, CA 93036
- Practice phone
- Call (805) 650-4700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Southern California Permanente Medical Group
Oxnard, California
Find David Chayawatna's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
David Ereso Chayawatna is a nurse practitioner in Oxnard, California
David Chayawatna practices at Southern California Permanente Medical Group in Oxnard, California.
David Chayawatna's NPI, 1457913485, was assigned on June 29, 2019. David Chayawatna holds California license 95011991.
- NPI
- 1457913485NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4789042904
- NPI enumeration date
- June 29, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (805) 650-4700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
David Ereso Chayawatna practices at Southern California Permanente Medical Group in Oxnard, California
David Chayawatna's primary practice is Southern California Permanente Medical Group, at 2103 E Gonzales Rd, Oxnard, CA 93036 in Ventura County. The practice phone is (805) 650-4700.
- Southern California Permanente Medical Group2103 E Gonzales Rd, Oxnard, CA 93036 · Ventura CountyPhone(805) 650-4700
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
David Ereso Chayawatna is affiliated with 2 sites of care and 2 medical groups
David Chayawatna's primary practice is Southern California Permanente Medical Group in Oxnard, California. The medical group on file is Southern California Permanente Medical Group. Dmand AI also links David Chayawatna to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at David Ereso Chayawatna's practice
Dmand AI tracks the electronic health record (EHR) system at each site where David Chayawatna practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Southern California Permanente Medical Group | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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David Ereso Chayawatna is one of 5,983 nurse practitioners in California
Nurse practitioner is David Chayawatna's primary specialty in the NPI Registry, under taxonomy code 363L00000X. David Chayawatna is licensed in California.
Specialties and state licenses
- Nurse practitioner, CaliforniaPrimary
Nurse practitioners near David Chayawatna
Counts of nurse practitioners with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
David Ereso Chayawatna's patients have a median age of 64
Across all payers, Dmand AI patient panel data puts David Chayawatna's median patient age at 64, with 43% women.
David Chayawatna's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women43%
- Men57%
Source: Dmand AI Patient Panel Data
David Ereso Chayawatna wrote 829 Medicare Part D claims in 2024
In 2024, David Chayawatna wrote 829 Medicare Part D claims for 215 patients. 49% of them were for generic drugs.
David Chayawatna's Part D claims by kind of drug, 2024
- Generic403 claims49%
- Brand-name364 claims44%
- Other62 claims7%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How David Ereso Chayawatna takes part in Medicare
David Chayawatna accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for David Ereso Chayawatna's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about David Ereso Chayawatna
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What is David Ereso Chayawatna's NPI number?
David Ereso Chayawatna's NPI number is 1457913485. It was assigned on June 29, 2019, and it is active in the NPI Registry.
What does David Ereso Chayawatna specialize in?
David Ereso Chayawatna is a nurse practitioner in Oxnard, California. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does David Ereso Chayawatna practice?
David Chayawatna practices at 2103 E Gonzales Rd, Oxnard, CA 93036. David Chayawatna's primary practice is Southern California Permanente Medical Group in Oxnard, California. Dmand AI also links David Chayawatna to 1 group practice or clinic and 1 medical group.
What is David Ereso Chayawatna's office phone number?
The practice phone on file for David Chayawatna is (805) 650-4700.
What is David Ereso Chayawatna's medical license number?
David Chayawatna holds California license 95011991.
What medical group is David Ereso Chayawatna part of?
David Chayawatna is linked to Southern California Permanente Medical Group. Dmand AI links David Chayawatna to 1 more medical group.
Does David Ereso Chayawatna accept Medicare?
Yes. CMS lists David Chayawatna as accepting Medicare assignment.
How long has David Ereso Chayawatna been practicing?
David Chayawatna graduated from medical school in 2018, 8 years ago.
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