Dr. Johnathon Eric Downing, MD
- Medicare services, 2024
- 1,688
- Medicare patients, 2024
- 427
- Part D claims, 2024
- 1,581
- MIPS score, 2024
- 84
- Hospital affiliations
- 1
- Practice address
- 879 W 190th St, Gardena, CA 90248
- Practice phone
- Call (310) 329-9975
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
East-West Eye Institute a Medical Corporation
Gardena, California
Find Dr. Downing'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.
Dr. Johnathon Eric Downing is an ophthalmologist in Gardena, California
Dr. Downing practices at East-West Eye Institute a Medical Corporation in Gardena, California.
Dr. Downing's NPI, 1285990671, was assigned on April 10, 2012. Dr. Downing graduated from University Of Louisville School Of Medicine in 2011. Dr. Downing holds California license A148366.
- NPI
- 1285990671NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7113234584
- NPI enumeration date
- April 10, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (310) 329-9975
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Johnathon Eric Downing practices at East-West Eye Institute a Medical Corporation in Gardena, California
Dr. Downing's primary practice is East-West Eye Institute a Medical Corporation, at 879 W 190th St, Gardena, CA 90248 in Los Angeles County. The practice phone is (310) 329-9975.
- East-West Eye Institute a Medical Corporation879 W 190th St, Gardena, CA 90248 · Los Angeles CountyPhone(310) 329-9975
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Johnathon Eric Downing is affiliated with 3 sites of care and 1 medical group
Dr. Downing's primary practice is East-West Eye Institute a Medical Corporation in Gardena, California. Dr. Downing is also affiliated with Providence Little Company of Mary Medical Center Torrance. Dmand AI also links Dr. Downing 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 Dr. Johnathon Eric Downing's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Downing practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| East-West Eye Institute a Medical Corporation | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Johnathon Eric Downing is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Downing's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Downing is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Downing's licenses on file in 2 states: California and Kentucky.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Kentucky license
Ophthalmologists near Dr. Downing
Counts of ophthalmologists 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
Dr. Johnathon Eric Downing billed Medicare for 1,688 services in 2024
CMS data shows 1,688 Medicare services from Dr. Downing across 16 procedure codes in 2024, for 427 Medicare patients. Medicare paid $135,690 for them.
Dr. Downing's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1,4632024: 1,4781%
- Surgery
- 2023: 882024: 11632%
- Imaging
- 2023: 392024: 78100%
- Office and hospital visits
- 2023: 132024: 1623%
Where Dr. Downing's Medicare services took place, 2024
- In an office1,57293%
- In a facility1167%
Dr. Downing compared with the California median for ophthalmologists, 2024
- Dr. Downing
- California median
- Medicare services
- 1,688vs 1,07956% above
- Medicare patients
- 427vs 421Close to median
- Part D claims
- 1,502vs 6182.4 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Downing's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Downing and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Johnathon Eric Downing treated 427 Medicare patients in 2024, average age 76
CMS counts 427 Medicare patients who saw Dr. Downing in 2024. The largest group is 65 to 74, with 158 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 32% are also on Medicaid. Their average risk score is 1.41, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Downing's median patient age at 71, with 60% women.
Dr. Downing's Medicare patients by age, 2024
Dr. Downing's Medicare patients by sex, 2024
- Women27264%
- Men15536%
Chronic conditions among Dr. Downing's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis47%
- Diabetes44%
- Chronic kidney disease29%
- Mood disorders23%
- Ischemic heart disease21%
- Depression20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Downing's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Johnathon Eric Downing wrote 1,581 Medicare Part D claims in 2024
In 2024, Dr. Downing wrote 1,581 Medicare Part D claims for 413 patients. 53% of them were for generic drugs. CMS names the drug for 1,502 of them, across 16 drugs with 11 or more claims each, at $113,727 in total drug cost. In 2023, CMS named 1,418 claims across 19 drugs.
Dr. Downing's Part D claims by kind of drug, 2024
- Generic845 claims53%
- Brand-name736 claims47%
Dr. Downing's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,4182024: 1,5026%
Drugs named by CMS: 16 in 2024, 19 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Johnathon Eric Downing scored 84 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 84 out of 100 for Dr. Downing for performance year 2024, reported as part of a group. Dr. Downing accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 121 procedures of cataract surgery by Dr. Downing, more than 77% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Dr. Downing's MIPS scores, performance year 2024
- 84of 100Final score
- 91.9of 100Quality
- 76of 100Promoting Interoperability
- 40of 100Improvement Activities
- 76of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Downing ranks in Medicare procedure volume
- Cataract surgery
- 77th percentile121 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Johnathon Eric Downing received $2,542 in industry payments from 2016 to 2025
CMS Open Payments shows 69 general payments to Dr. Downing from 24 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $464.
General payments to Dr. Downing by program year, 2016 to 2025
Companies that paid Dr. Downing the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Johnathon Eric Downing graduated from University Of Louisville School Of Medicine
Dr. Downing graduated from University Of Louisville School Of Medicine in 2011.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Johnathon Eric Downing accepts plans from 22 insurance carriers
Dr. Downing is in network with 22 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- HCSC
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- Elevance
- Humana
- LA Care
- +14 more carriersWith a free account
Plan types Dr. Downing accepts, by number of carriers
- HMO13
- PPO11
- Medicare10
- POS6
- EPO4
- Medicaid2
Source: Dmand AI Insurance Network Data
Sources for Dr. Johnathon Eric Downing'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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 Dr. Johnathon Eric Downing
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Johnathon Eric Downing's NPI number?
Dr. Johnathon Eric Downing's NPI number is 1285990671. It was assigned on April 10, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnathon Eric Downing?
Dr. Johnathon Eric Downing is an ophthalmologist in Gardena, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Johnathon Eric Downing practice?
Dr. Downing practices at 879 W 190th St, Gardena, CA 90248. Dr. Downing's primary practice is East-West Eye Institute a Medical Corporation in Gardena, California. Dmand AI also links Dr. Downing to 1 group practice or clinic and 1 medical group.
What is Dr. Johnathon Eric Downing's office phone number?
The practice phone on file for Dr. Downing is (310) 329-9975.
What is Dr. Johnathon Eric Downing's medical license number?
Dr. Downing holds California license A148366, one of the licenses on file in 2 states.
Which states has Dr. Johnathon Eric Downing been licensed in?
Dmand AI has state licenses on file for Dr. Downing in California (2017 to 2026) and Kentucky (2016 to 2026).
Which hospitals is Dr. Johnathon Eric Downing affiliated with?
Dr. Downing is affiliated with Providence Little Company of Mary Medical Center Torrance.
Does Dr. Johnathon Eric Downing accept Medicare?
Yes. CMS data shows Dr. Downing billed Medicare for 1,688 services in 2024, and Dr. Downing accepts Medicare assignment.
What is Dr. Johnathon Eric Downing's MIPS score?
Dr. Downing's MIPS final score for performance year 2024 is 84 out of 100, reported as part of a group.
How many Medicare patients does Dr. Johnathon Eric Downing see?
CMS counts 427 Medicare patients who saw Dr. Downing in 2024, with an average age of 76.
Show 7 more questionsShow fewer questions
Is Dr. Johnathon Eric Downing board certified?
Yes. Dr. Downing is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Johnathon Eric Downing bill to Medicare?
In 2024, Dr. Downing's most billed Medicare services were eye exam or test (92012), eye exam or test (92014) and eye exam or test (92083).
Where did Dr. Johnathon Eric Downing go to medical school?
Dr. Downing graduated from University Of Louisville School Of Medicine in 2011.
What drugs does Dr. Johnathon Eric Downing prescribe most?
In 2024 Medicare Part D data, Dr. Downing's most prescribed drugs by claims were Latanoprost, Dorzolamide-Timolol and Brimonidine Tartrate.
Has Dr. Johnathon Eric Downing received payments from drug or device companies?
CMS Open Payments shows $2,542 in general payments to Dr. Downing from 24 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Johnathon Eric Downing been practicing?
Dr. Downing graduated from medical school in 2011, 15 years ago.
What insurance does Dr. Johnathon Eric Downing accept?
Dr. Downing is in network with 22 carriers, including Aetna, Blue Cross Blue Shield of Michigan and HCSC. HMO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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