Dr. Kent A Karren , MD
Ophthalmology • Eugene, OR
1550 Oak St, Suite #3
Eugene, OR 974017701
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on July 12, 2005; this date does not establish years in practice.
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Published CMS data list 1,292 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 — Established patient outpatient office visit: 340 service units.
- 99213 — Established patient outpatient office visit: 226 service units.
- 92134 — Imaging of retina: 192 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 16 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 426 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Latanoprost — 176 prescription fills, including refills.
- Timolol Maleate — 58 prescription fills, including refills.
- Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) — 46 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 10 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Eugene, OR (2024, 23 clinicians with data). Median for this group: 1,674. Middle half: 1,386 to 2,459.
Fewer Medicare Part B services than 60% of clinicians listed under Ophthalmology in Oregon (2024, 168 clinicians with data). Median for this group: 1,594. Middle half: 886 to 2,539.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 2,448 in 2020 to 1,292 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
1550 Oak St
Suite #3
Eugene, OR 974017701
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Sharon Richens Md Eye Physician And Surgeon Pc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Medical College Of Wisconsin
1986
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
681 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $141,747 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $95,819 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
30-day fills
749 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$22,355 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $766.91 across 31 records.
By nature of payment
- Food and Beverage: $766.91 across 31 records.
Reporting-company totals (3 largest of 11)
- Tarsus Pharmaceuticals, Inc.: $121.95 across 6 records.
- Regeneron Pharmaceuticals, Inc.: $103.13 across 4 records.
- Bausch & Lomb Americas Inc.: $99.04 across 3 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Karren has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Karren as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Eugene and Oregon
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 75% of clinicians listed under Ophthalmology in Eugene, OR (2024, 23 clinicians with data). Median for this group: 1,674. Middle half: 1,386 to 2,459.
Fewer Medicare Part B services than 60% of clinicians listed under Ophthalmology in Oregon (2024, 168 clinicians with data). Median for this group: 1,594. Middle half: 886 to 2,539.
Medicare-allowed amount
A lower Medicare-allowed amount than 80% of clinicians listed under Ophthalmology in Eugene, OR (2024, 23 clinicians with data). Median for this group: $234,018. Middle half: $173,170 to $298,774.
A lower Medicare-allowed amount than 65% of clinicians listed under Ophthalmology in Oregon (2024, 168 clinicians with data). Median for this group: $199,068. Middle half: $106,406 to $319,275.
Paid by Medicare
A lower Medicare payment amount than 80% of clinicians listed under Ophthalmology in Eugene, OR (2024, 23 clinicians with data). Median for this group: $174,213. Middle half: $118,833 to $218,441.
A lower Medicare payment amount than 65% of clinicians listed under Ophthalmology in Oregon (2024, 168 clinicians with data). Median for this group: $139,665. Middle half: $70,100 to $229,023.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% of clinicians listed under Ophthalmology in Eugene, OR (2024, 24 clinicians with data). Median for this group: 1,226. Middle half: 484 to 2,256.
Fewer Part D prescriptions than 65% of clinicians listed under Ophthalmology in Oregon (2024, 201 clinicians with data). Median for this group: 955. Middle half: 330 to 1,828.
Part D drug cost
A lower Part D drug cost than 90% of clinicians listed under Ophthalmology in Eugene, OR (2024, 24 clinicians with data). Median for this group: $70,411. Middle half: $35,117 to $127,178.
A lower Part D drug cost than 65% of clinicians listed under Ophthalmology in Oregon (2024, 201 clinicians with data). Median for this group: $47,273. Middle half: $9,850 to $100,258.
30 active clinicians are listed under Ophthalmology with a practice address in Eugene, OR (324 in Oregon).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Eugene
0% of these 30 clinicians have the CMS telehealth indicator.
83.3% of these 30 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services decreased 47% from 2,448 in 2020 to 1,292 in 2024.
- 2020: 2,448
- 2021: 2,393
- 2022: 2,055
- 2023: 1,075
- 2024: 1,292
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Medicare-allowed amount
Medicare-allowed amount decreased 44% from $255,142 in 2020 to $141,747 in 2024.
- 2020: $255,142
- 2021: $266,793
- 2022: $208,662
- 2023: $120,414
- 2024: $141,747
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Paid by Medicare
Paid by Medicare decreased 48% from $182,554 in 2020 to $95,819 in 2024.
- 2020: $182,554
- 2021: $187,342
- 2022: $146,308
- 2023: $81,216
- 2024: $95,819
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 84% from 2,729 in 2020 to 426 in 2024.
- 2020: 2,729
- 2021: 3,093
- 2022: 2,931
- 2023: 1,599
- 2024: 426
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30-day fills
30-day fills decreased 83% from 4,488 in 2020 to 749 in 2024.
- 2020: 4,488
- 2021: 5,308
- 2022: 5,202
- 2023: 3,303
- 2024: 749
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Part D drug cost
Part D drug cost decreased 91% from $251,869 in 2020 to $22,355 in 2024.
- 2020: $251,869
- 2021: $291,665
- 2022: $281,379
- 2023: $184,579
- 2024: $22,355
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $645.89 in 2021 to $766.91 in 2025.
- 2021: $645.89
- 2022: $240.35
- 2023: $277.49
- 2024: $770.39
- 2025: $766.91
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 – December 31, 2025): 31 records totaling $766.91.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Bausch & Lomb Americas Inc. |
Food and Beverage
In-kind items and services
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MIEBO | General | $69.32 |
| Glaukos Corporation |
Food and Beverage
Cash or cash equivalent
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iDoseTR | General | $59.56 |
| LKC Technologies, Inc. |
Food and Beverage
In-kind items and services
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— | General | $33.17 |
| Oyster Point Pharma, Inc. |
Food and Beverage
In-kind items and services
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TYRVAYA | General | $32.53 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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EYLEA HD | General | $30.59 |
| Apellis Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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Syfovre | General | $29.47 |
| Apellis Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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Syfovre | General | $28.62 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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EYLEA HD | General | $26.65 |
| Oyster Point Pharma, Inc. |
Food and Beverage
In-kind items and services
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TYRVAYA | General | $25.26 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $25.11 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
EYLEA HD | General | $23.71 |
| BIOTISSUE HOLDINGS INC. |
Food and Beverage
In-kind items and services
|
— | General | $23.45 |
| BIOTISSUE HOLDINGS INC. |
Food and Beverage
In-kind items and services
|
— | General | $23.03 |
| Oyster Point Pharma, Inc. |
Food and Beverage
In-kind items and services
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TYRVAYA | General | $22.81 |
| Genentech, Inc. |
Food and Beverage
In-kind items and services
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Vabysmo | General | $22.74 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $22.45 |
| Regeneron Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
EYLEA HD | General | $22.18 |
| Dompe US, Inc. |
Food and Beverage
In-kind items and services
|
OXERVATE | General | $21.75 |
| Dompe US, Inc. |
Food and Beverage
In-kind items and services
|
OXERVATE | General | $20.95 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $19.82 |
| Dompe US, Inc. |
Food and Beverage
In-kind items and services
|
OXERVATE | General | $19.58 |
| BIOTISSUE HOLDINGS INC. |
Food and Beverage
In-kind items and services
|
— | General | $19.31 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $18.71 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $18.19 |
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $17.67 |
(top 25 shown)
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2017–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
|
340 | 319 | $190.00 | $121.96 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
|
226 | 165 | $120.00 | $86.21 |
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92134
Imaging of retina
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192 | 182 | $125.00 | $37.93 |
|
92014
Established patient complete exam of visual system
|
98 | 97 | $210.00 | $118.48 |
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92133
Imaging of optic nerve
|
88 | 79 | $125.00 | $33.54 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
|
71 | 71 | $340.00 | $159.37 |
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92083
Exam of visual field with extended testing
|
56 | 52 | $180.00 | $59.12 |
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66821
Removal of recurring cataract in lens capsule using a laser
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48 | 40 | $745.00 | $290.39 |
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66984
Removal of cataract with insertion of prosthetic lens
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40 | 25 | $2000.00 | $504.12 |
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92004
New patient complete exam of visual system
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33 | 33 | $250.00 | $138.31 |
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92012
Established patient problem focused exam of visual system
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23 | 23 | $140.00 | $83.37 |
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92250
Photography of the retina
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22 | 19 | $130.00 | $34.82 |
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92136
Measurement of corneal curvature and depth of eye
|
15 | 14 | $185.00 | $43.91 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
|
15 | 14 | $110.00 | $53.42 |
|
67820
Removal of eyelashes using forceps
|
13 | 11 | $135.00 | $18.43 |
|
99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
|
12 | 12 | $225.00 | $106.25 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Latanoprost | Latanoprost | 176 | 10,772 | $2,498.09 | 82 |
| Timolol Maleate | Timolol Maleate | 58 | 3,293 | $539.65 | 28 |
| Neomycin-Polymyxin-Dexameth | Neomycin/Polymyxin B/Dexametha | 46 | 896 | $600.16 | 38 |
| Vyzulta | Latanoprostene Bunod | 33 | 1,055 | $9,173.44 | 14 |
| Prednisolone Acetate | Prednisolone Acetate | 31 | 674 | $1,052.08 | 24 |
| Brimonidine Tartrate | Brimonidine Tartrate | 27 | 1,875 | $706.26 | 19 |
| Moxifloxacin | Moxifloxacin Hcl | 17 | 252 | $393.25 | 11 |
| Dorzolamide-Timolol | Dorzolamide Hcl/Timolol Maleat | 14 | 1,010 | $247.24 | — |
| Lumigan | Bimatoprost | 12 | 605 | $5,001.51 | — |
| Travoprost | Travoprost | 12 | 408 | $2,143.78 | — |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207W00000X
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20240619001422
NV
8123034428
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Sharon Richens Md Eye Physician And Surgeon Pc
161 W 200, Saint George, UT 847707386
Phone: 4356524040
Sharon Richens Md Eye Physician And Surgeon Pc
1301 Bertha Howe Ave, Mesquite, NV 890277522
Phone: 7023462950
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Optometrist
Doctor of Optometry
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology - Glaucoma Specialist
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated July 12, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Ophthalmology Specialists in Eugene
- Dr. Julia Kuhn, MD
- Dr. Nicholas Baugnon, MD
- Dr. Jason Newman, MD
- Dr. Annette Sims, MD
- Dr. Judith Sabah, MD
- Dr. Joseph Mando, MD
Mailing Address
1550 Oak St, Suite #3
Eugene, OR 974017701
Phone: 5416832020