Dr. Mark Armando Prendes , MD
Ophthalmology • Chardon, OH
150 7th Ave Ste 100
Chardon, OH 440242909
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 June 6, 2012; this date does not establish years in practice.
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Published CMS data list 839 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:
- 99204 — New patient outpatient office visit: 198 service units.
- 15823 — Removal of excessive skin and fat of upper eyelid: 87 service units.
- 99213 — Established patient outpatient office visit: 75 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 18 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 283 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:
- Erythromycin (Erythromycin Base) — 167 prescription fills, including refills.
- Neomycin-Polymyxin-Dexameth (Neomycin/Polymyxin B/Dexametha) — 81 prescription fills, including refills.
- Cephalexin — 21 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 4 records in the table · Guide: How to read Medicare Part D prescriber data
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Fewer Medicare Part B services than 70% of clinicians listed under Ophthalmology in Ohio (2024, 460 clinicians with data). Median for this group: 1,488. Middle half: 826 to 2,678.
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 274 in 2020 to 839 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
150 7th Ave Ste 100
Chardon, OH 440242909
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: Ophthalmology And Oculoplastic Surgery Inc. 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
Indiana University School Of Medicine
2012
What Public CMS Data Show
Ophthalmology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
403 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 $185,872 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 $143,118 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
284 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
$2,594 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: $61.29 across 3 records.
By nature of payment
- Food and Beverage: $61.29 across 3 records.
Reporting-company totals
- Amgen Inc.: $35.86 across 2 records.
- Tarsus Pharmaceuticals, Inc.: $25.43 across 1 record.
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
14 years (graduated 2012)
CMS Doctors and Clinicians data list 2012 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
2012
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. Prendes 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. Prendes 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 Chardon and Ohio
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 70% of clinicians listed under Ophthalmology in Ohio (2024, 460 clinicians with data). Median for this group: 1,488. Middle half: 826 to 2,678.
Too few clinicians listed under Ophthalmology in Chardon have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
Close to the middle for clinicians listed under Ophthalmology in Ohio (2024, 460 clinicians with data). Median for this group: $169,730. Middle half: $83,667 to $301,859.
Too few clinicians listed under Ophthalmology in Chardon have Medicare Part B data for 2024 to compare.
Paid by Medicare
Close to the middle for clinicians listed under Ophthalmology in Ohio (2024, 460 clinicians with data). Median for this group: $120,237. Middle half: $58,207 to $218,165.
Too few clinicians listed under Ophthalmology in Chardon have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Fewer Part D prescriptions than 80% of clinicians listed under Ophthalmology in Ohio (2024, 492 clinicians with data). Median for this group: 1,113. Middle half: 423 to 2,190.
Too few clinicians listed under Ophthalmology in Chardon have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 85% of clinicians listed under Ophthalmology in Ohio (2024, 492 clinicians with data). Median for this group: $73,489. Middle half: $13,674 to $174,083.
Too few clinicians listed under Ophthalmology in Chardon have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Ophthalmology with a practice address in Chardon, OH (752 in Ohio).
Addresses are self-reported to NPPES and may be out of date.
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 increased 206% from 274 in 2020 to 839 in 2024.
- 2020: 274
- 2021: 412
- 2022: 408
- 2023: 373
- 2024: 839
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Medicare-allowed amount
Medicare-allowed amount increased 660% from $24,448 in 2020 to $185,872 in 2024.
- 2020: $24,448
- 2021: $45,088
- 2022: $40,659
- 2023: $39,640
- 2024: $185,872
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Paid by Medicare
Paid by Medicare increased 704% from $17,795 in 2020 to $143,118 in 2024.
- 2020: $17,795
- 2021: $34,159
- 2022: $29,177
- 2023: $27,951
- 2024: $143,118
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 515% from 46 in 2020 to 283 in 2024.
- 2020: 46
- 2021: 56
- 2022: 37
- 2023: 72
- 2024: 283
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30-day fills
30-day fills increased 516% from 46 in 2020 to 284 in 2024.
- 2020: 46
- 2021: 56
- 2022: 37
- 2023: 75
- 2024: 284
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Part D drug cost
Part D drug cost went from $574 in 2020 to $2,594 in 2024.
- 2020: $574
- 2021: $850,918
- 2022: $436
- 2023: $1,239
- 2024: $2,594
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $30.35 in 2021 to $61.29 in 2025.
- 2021: $30.35
- 2022: $8,255.41
- 2023: $222.77
- 2024: $351.35
- 2025: $61.29
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): fewer than 11 records totaling $61.29.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Tarsus Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
XDEMVY | General | $25.43 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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TEPEZZA | General | $17.98 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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TEPEZZA | General | $17.88 |
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 2017–2023 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, 2018–2024; 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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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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198 | 198 | $300.00 | $157.41 |
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15823
Removal of excessive skin and fat of upper eyelid
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87 | 87 | $3000.00 | $770.98 |
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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
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75 | 54 | $150.00 | $84.90 |
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92081
Exam of visual field with limited testing
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74 | 72 | $55.00 | $30.10 |
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92083
Exam of visual field with extended testing
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58 | 57 | $125.00 | $57.50 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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56 | 56 | $200.00 | $105.47 |
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67900
Repair of brow paralysis
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53 | 53 | $1981.13 | $344.23 |
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92285
Photography of content of eyes
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45 | 45 | $50.00 | $20.24 |
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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
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29 | 29 | $200.00 | $121.19 |
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68840
Probing of nasal tear duct
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28 | 28 | $285.71 | $138.78 |
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67840
Removal of growth of eyelid
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24 | 24 | $531.25 | $260.21 |
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92082
Exam of visual field with intermediate testing
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24 | 24 | $75.00 | $35.97 |
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67917
Extensive repair of turning-outward eyelid defect
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17 | 16 | $1644.12 | $487.02 |
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67800
Removal of chronic growth of eyelid
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15 | 15 | $300.00 | $115.95 |
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67904
Repair of tendon of upper eyelid
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15 | 14 | $2050.00 | $756.90 |
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67810
Biopsy of eyelid
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14 | 14 | $300.00 | $162.36 |
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67924
Extensive repair of turning-inward eyelid defect
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14 | 13 | $1285.71 | $439.51 |
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67908
Removal of tissue, muscle, and membrane to correct eyelid drooping or paralysis
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13 | 13 | $1400.00 | $487.06 |
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 |
|---|---|---|---|---|---|
| Erythromycin | Erythromycin Base | 167 | 2,339 | $1,562.78 | 149 |
| Neomycin-Polymyxin-Dexameth | Neomycin/Polymyxin B/Dexametha | 81 | 1,390 | $813.47 | 65 |
| Cephalexin | Cephalexin | 21 | 179 | $79.54 | 20 |
| Valacyclovir | Valacyclovir Hcl | 14 | 98 | $137.83 | 13 |
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
Self-certified to NPPES: 2023-08-30NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - OPHTHALMOLOGY
I20180830002880
OH
0648418160
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
Ophthalmology And Oculoplastic Surgery Inc
150 7th Ave, Chardon, OH 440242909
Phone: 4402852020
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Ophthalmology
Doctor of Medicine (M.D.)
Ophthalmology
Doctor of Medicine (M.D.)
Optometrist
Doctor of Optometry
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 150 7TH AVE STE 100, CHARDON, OH 440242909 (Tel: 4402852020)
Registered at 150 7TH AVE STE 100, CHARDON, OH 440242909 (Tel: 4402852020)
Ophthalmology (license number reported to NPPES: OH 35.133570)
NPI status registered as active in NPPES database
Registered at 301 EAST MUHAMMAD ALI BOULEVARD, LOUISVILLE, KY 40202 (Tel: 5028525466)
Registered at P.O. BOX 909, LOUISVILLE, KY 40201
Recorded as MARK PRENDES, M.D.
Ophthalmology (license number reported to NPPES: WA ML60377798)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
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Mailing Address
150 7th Ave Ste 100
Chardon, OH 440242909
Phone: 4402852020