Dr. John William Karth, MD
- Medicare services, 2024
- 122,285
- Medicare patients, 2024
- 1,235
- Part D claims, 2024
- 945
- Publications
- 2
- MIPS score, 2024
- 94
- Practice address
- 1550 Oak Street, Suite 8, Eugene, OR 97401
- Practice phone
- Call (541) 683-8771
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Oregon Eye Surgery Center
Surgery Center - Medicare-Certified · Eugene, Oregon
Find Dr. Karth'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. John William Karth is an ophthalmologist in Eugene, Oregon
Dr. Karth practices at Oregon Eye Surgery Center in Eugene, Oregon.
Dr. Karth's NPI, 1588862320, was assigned on July 3, 2007. Dr. Karth graduated from Johns Hopkins University School of Medicine in 2002. Dr. Karth holds Oregon license MD27623.
- NPI
- 1588862320NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1355433319
- NPI enumeration date
- July 3, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (541) 683-8771
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John William Karth practices at Oregon Eye Surgery Center in Eugene, Oregon
Dr. Karth's primary practice is Oregon Eye Surgery Center, at 1550 Oak Street, Suite 8, Eugene, OR 97401. The practice phone is (541) 683-8771.
- Oregon Eye Surgery Center1550 Oak Street, Suite 8, Eugene, OR 97401Phone(541) 683-8771
Source: Dmand AI Affiliation Data
Dr. John William Karth is affiliated with 2 sites of care and 1 medical group
Dr. Karth's primary practice is Oregon Eye Surgery Center in Eugene, Oregon. Dmand AI also links Dr. Karth to 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John William Karth's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karth practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Oregon Eye Surgery Center | 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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Dr. John William Karth is one of 272 ophthalmologists in Oregon
Ophthalmology is Dr. Karth's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Karth is licensed in Oregon.
Specialties and state licenses
- Ophthalmology, OregonPrimary
Ophthalmologists near Dr. Karth
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. John William Karth billed Medicare for 122,285 services in 2024
CMS data shows 122,285 Medicare services from Dr. Karth across 20 procedure codes in 2024, for 1,235 Medicare patients. Medicare paid $5,166,490 for them.
Dr. Karth's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 71,1272024: 113,21859%
- Tests and treatments
- 2023: 3,7942024: 4,15910%
- Surgery
- 2023: 2,7722024: 2,8744%
- Office and hospital visits
- 2023: 2,3142024: 2,01813%
- Imaging
- 2023: 122024: 1633%
Where Dr. Karth's Medicare services took place, 2024
- In an office122,253100%
- In a facility320%
Dr. Karth compared with the Oregon median for ophthalmologists, 2024
- Dr. Karth
- Oregon median
- Medicare services
- 122,285vs 1,100111.2 times
- Medicare patients
- 1,235vs 4952.5 times
- Part D claims
- 887vs 56657% above
Medians across 288 ophthalmologists in Oregon with Dmand AI profiles that report each measure.
Dr. Karth'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. Karth and other ophthalmologists in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John William Karth treated 1,235 Medicare patients in 2024, average age 77
CMS counts 1,235 Medicare patients who saw Dr. Karth in 2024. The largest group is 75 to 84, with 493 patients. 72% of them have high blood pressure, and 69% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.36, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Karth's median patient age at 76, with 60% women.
Dr. Karth's Medicare patients by age, 2024
Dr. Karth's Medicare patients by sex, 2024
- Women73660%
- Men49940%
Chronic conditions among Dr. Karth's Medicare patients, 2024
- High blood pressure72%
- High cholesterol69%
- Arthritis44%
- Diabetes33%
- Chronic kidney disease28%
- Atrial fibrillation20%
- Ischemic heart disease20%
- Mood disorders19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karth's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
Patient panel by sex, all payers
- Women60%
- Men40%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John William Karth wrote 945 Medicare Part D claims in 2024
In 2024, Dr. Karth wrote 945 Medicare Part D claims for 291 patients. 68% of them were for generic drugs. CMS names the drug for 887 of them, across 14 drugs with 11 or more claims each, at $48,443 in total drug cost. In 2023, CMS named 798 claims across 15 drugs.
Dr. Karth's Part D claims by kind of drug, 2024
- Generic647 claims68%
- Brand-name298 claims32%
Dr. Karth'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: 7982024: 88711%
Drugs named by CMS: 14 in 2024, 15 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. John William Karth scored 94 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Karth for performance year 2024, reported as part of a group. Dr. Karth accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Karth's MIPS scores, performance year 2024
- 94of 100Final score
- 86.8of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
- 86of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John William Karth has 2 publications on record
Dmand AI links 2 papers to Dr. Karth, published from 2013 to 2020. Dr. Karth's most frequent co-authors are Peter Alan Karth, MD, Robert McLain Beardsley, MD and Allan Armstrong Hunter, MD.
Dr. Karth's most frequent co-authors
- Peter Alan Karth, MD2 shared papers
- Robert McLain Beardsley, MD1 shared paper
- Allan Armstrong Hunter, MD1 shared paper
Recent publications by Dr. Karth
See who Dr. Karth researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Karth works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. John William Karth received $3,383 in industry payments from 2016 to 2025
CMS Open Payments shows 95 general payments to Dr. Karth from 16 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Regeneron Pharmaceuticals, Inc. paid the most, $856.
General payments to Dr. Karth by program year, 2016 to 2025
Companies that paid Dr. Karth 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. John William Karth graduated from Johns Hopkins University School of Medicine
Dr. Karth graduated from Johns Hopkins University School of Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John William Karth'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. John William Karth
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. John William Karth's NPI number?
Dr. John William Karth's NPI number is 1588862320. It was assigned on July 3, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. John William Karth?
Dr. John William Karth is an ophthalmologist in Eugene, Oregon. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. John William Karth practice?
Dr. Karth practices at 1550 Oak Street, Suite 8, Eugene, OR 97401. Dr. Karth's primary practice is Oregon Eye Surgery Center in Eugene, Oregon. Dmand AI also links Dr. Karth to 1 group practice or clinic and 1 medical group.
What is Dr. John William Karth's office phone number?
The practice phone on file for Dr. Karth is (541) 683-8771.
What is Dr. John William Karth's medical license number?
Dr. Karth holds Oregon license MD27623.
Does Dr. John William Karth accept Medicare?
Yes. CMS data shows Dr. Karth billed Medicare for 122,285 services in 2024, and Dr. Karth accepts Medicare assignment.
What is Dr. John William Karth's MIPS score?
Dr. Karth's MIPS final score for performance year 2024 is 94 out of 100, reported as part of a group.
How many Medicare patients does Dr. John William Karth see?
CMS counts 1,235 Medicare patients who saw Dr. Karth in 2024, with an average age of 77.
What services does Dr. John William Karth bill to Medicare?
In 2024, Dr. Karth's most billed Medicare services were injected or infused drug (J2777), injected or infused drug (J2781) and eye exam or test (92134).
Where did Dr. John William Karth go to medical school?
Dr. Karth graduated from Johns Hopkins University School of Medicine in 2002.
Show 5 more questionsShow fewer questions
What drugs does Dr. John William Karth prescribe most?
In 2024 Medicare Part D data, Dr. Karth's most prescribed drugs by claims were Ofloxacin, Prednisolone Acetate and Neomycin-Polymyxin-Dexameth.
Has Dr. John William Karth received payments from drug or device companies?
CMS Open Payments shows $3,383 in general payments to Dr. Karth from 16 companies from 2016 to 2025. The largest total came from Regeneron Pharmaceuticals, Inc.
How long has Dr. John William Karth been practicing?
Dr. Karth graduated from medical school in 2002, 24 years ago.
Does Dr. John William Karth do research?
Dmand AI links 2 publications to Dr. Karth, published from 2013 to 2020.
Who does Dr. John William Karth publish with?
Dr. Karth's most frequent co-authors are Peter Alan Karth, MD (2 shared papers), Robert McLain Beardsley, MD (1 shared paper) and Allan Armstrong Hunter, MD (1 shared paper).
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