Kathleen Marie Mackessy, FNP
Family Nurse Practitioner · San Diego, CA
Kathleen Marie Mackessy, FNP is a family nurse practitioner with a practice address in San Diego, California, and NPI 1669944369, issued on Dec 19, 2018. Check the license (California NPF95010414, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Kathleen Marie Mackessy
- Credential
- FNP
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License number
- NPF95010414 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6155 Cornerstone CT E Ste 220, San Diego, CA 92121
- Phone
- (858) 458-2993
- Enumerated
- Dec 19, 2018
- Record last updated
- Nov 6, 2019 (not updated in 7 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 16,966 in California → Look up another NPI →
Also registered at 6155 Cornerstone CT E Ste 220
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mackenzie CypherNurse Practitioner1114432101
- My Van Nguyen, MSN-APRN-FNP-CFamily Nurse Practitioner1598383689
Verify Kathleen Marie Mackessy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license NPF95010414Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $93.67
3 payments; by number, the most common kind was food and beverage; the largest payer was Zoll Services LLC (a/k/a Zoll LifeCor Corp). 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.
Kathleen Marie Mackessy among 16,966 family nurse practitioner records in California
Kathleen Marie Mackessy, 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 2018, is newer than 45% of them.
- NPI issued2018 · 45% of these records are older, 50% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 40% of these records are
- Record last updated2019 · 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).
799 family nurse practitioner records list a practice address in San Diego
They are 799 of the 52,937 NPPES records with a practice address in San Diego, and 16,966 family nurse practitioner records in California.
All 16,966 in California → Every provider in San Diego → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Tara Akins, FNPSan Diego, CA 921211548475072
- Cynthia Collins, NPSan Diego, CA 921211780869164
- Jennifer Kolinski, NP-CSan Diego, CA 921211932487766
- Karen Kupferman, FNPSan Diego, CA 921211801958541
- Siri Martin, F.N.P.San Diego, CA 921211053535336
- Julea Minton, NP-CSan Diego, CA 921211063662484
- Rebecca Navarrete, MSN, FNPSan Diego, CA 921211821307521
- Adelle Nicolas, FNPSan Diego, CA 921211285996629
Common questions
What is Kathleen Marie Mackessy, FNP's NPI number?
Kathleen Marie Mackessy, FNP's National Provider Identifier (NPI) is 1669944369, issued on Dec 19, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Kathleen Marie Mackessy, FNP located?
The NPPES record lists a practice address at 6155 Cornerstone CT E Ste 220, San Diego, CA, 92121. Phone: (858) 458-2993. Providers update this record themselves, so call before visiting.
How can I verify Kathleen Marie Mackessy, FNP's license?
NPPES lists California license number NPF95010414, 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. 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.