John J. Kownacki, MD
Ophthalmology Physician · El Cajon, CA
John J. Kownacki, MD is an ophthalmology physician with a practice address in El Cajon, California, and NPI 1225189418, issued on Jan 15, 2007. Check the license (California G84672, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John J. Kownacki
- Credential
- MD
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- G84672 CA
Self-reported in NPPES; status is on the state search - Practice location
- 680 Fletcher Pkwy Ste 202, El Cajon, CA 92020
- Phone
- (619) 440-2022
- Enumerated
- Jan 15, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (619) 440-2466
- Medicaid ID
- 00G846720 CA
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 2,899 in California → Look up another NPI →
Also registered at 680 Fletcher Pkwy Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Drew EricksonMarriage & Family Therapist1720601578
- Amelia RayClinical Social Worker1740643527
Verify John J. Kownacki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G84672Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average ophthalmology physician in 2024
12 Medicare Part D claims, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Alendronate Sodium12 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: $140.68
1 payment: food and beverage; the largest payer was Alcon Vision LLC. The 13,221 providers of this specialty with any payment received $4,535.02 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.
John J. Kownacki among 2,899 ophthalmology physician records in California
John J. Kownacki, MD is one of 2,899 ophthalmology physician records with a practice address in California. 79% 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 55% of them.
- NPI issued2007 · 55% of these records are older, 33% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 66% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in California
There are 2,899 ophthalmology physician records in California.
All 2,899 in California → Every provider in El Cajon → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Franklin Crystal, MDEl Cajon, CA 920201770591521
- Christopher Hsu, MDEl Cajon, CA 920201336167618
- Douglas Miller, MDEl Cajon, CA 920201982636031
- Frank KohlEl Cajon, CA 920191649692914
- Michelle Crosby, M.D., PH.D.Encinitas, CA 920241558549303
- Srinivas Iyengar, MDEncinitas, CA 920241104030055
- Eric Johnston, MDEncinitas, CA 920241114916053
- Joan Kaestner, MDEncinitas, CA 920241184723728
Common questions
What is John J. Kownacki, MD's NPI number?
John J. Kownacki, MD's National Provider Identifier (NPI) is 1225189418, issued on Jan 15, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John J. Kownacki, MD located?
The NPPES record lists a practice address at 680 Fletcher Pkwy Ste 202, El Cajon, CA, 92020. Phone: (619) 440-2022. Providers update this record themselves, so call before visiting.
How can I verify John J. Kownacki, MD's license?
NPPES lists California license number G84672, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John J. Kownacki, MD prescribe under Medicare Part D?
In 2024, John J. Kownacki, MD had 12 Medicare Part D claims; the average among ophthalmology physician prescribers was 1,518. 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.