Dr. Jonathan Karnes , MD
Dermatology • Augusta, ME
6 E Chestnut St
Augusta, ME 043305758
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 20, 2007; this date does not establish years in practice.
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Published CMS data list 1,375 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:
- 17003 — Destruction of precancer skin growth, 2-14 growths: 522 service units.
- 99213 — Established patient outpatient office visit: 337 service units.
- 17000 — Destruction of precancer skin growth, 1 growth: 221 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 7 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 1,095 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:
- Clobetasol Propionate — 195 prescription fills, including refills.
- Triamcinolone Acetonide — 124 prescription fills, including refills.
- Ketoconazole — 73 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 32 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 Dermatology in Maine (2024, 43 clinicians with data). Median for this group: 1,972. Middle half: 1,298 to 3,737.
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 1,591 in 2020 to 1,375 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
6 E Chestnut St
Augusta, ME 043305758
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: Mainegeneral Medical Center. 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
2007
What Public CMS Data Show
Dermatology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
343 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 $50,813 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 $34,358 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
1,471 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
$2,099,494 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.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
19 years (graduated 2007)
CMS Doctors and Clinicians data list 2007 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
2007
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. Karnes 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. Karnes 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 Augusta and Maine
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 70% of clinicians listed under Dermatology in Maine (2024, 43 clinicians with data). Median for this group: 1,972. Middle half: 1,298 to 3,737.
Too few clinicians listed under Dermatology in Augusta have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A lower Medicare-allowed amount than 75% of clinicians listed under Dermatology in Maine (2024, 43 clinicians with data). Median for this group: $115,842. Middle half: $61,670 to $229,299.
Too few clinicians listed under Dermatology in Augusta have Medicare Part B data for 2024 to compare.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Dermatology in Maine (2024, 43 clinicians with data). Median for this group: $84,421. Middle half: $41,351 to $165,404.
Too few clinicians listed under Dermatology in Augusta have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 80% of clinicians listed under Dermatology in Maine (2024, 45 clinicians with data). Median for this group: 599. Middle half: 471 to 979.
Too few clinicians listed under Dermatology in Augusta have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 95% of clinicians listed under Dermatology in Maine (2024, 45 clinicians with data). Median for this group: $250,968. Middle half: $22,769 to $546,888.
Too few clinicians listed under Dermatology in Augusta have Medicare Part D data for 2024 to compare.
3 active clinicians are listed under Dermatology with a practice address in Augusta, ME (58 in Maine).
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 decreased 14% from 1,591 in 2020 to 1,375 in 2024.
- 2020: 1,591
- 2021: 1,426
- 2022: 1,473
- 2023: 1,193
- 2024: 1,375
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $54,166 in 2020 and $50,813 in 2024.
- 2020: $54,166
- 2021: $51,890
- 2022: $58,467
- 2023: $48,141
- 2024: $50,813
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Paid by Medicare
Paid by Medicare stayed about the same: $35,050 in 2020 and $34,358 in 2024.
- 2020: $35,050
- 2021: $35,873
- 2022: $40,426
- 2023: $32,768
- 2024: $34,358
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 40% from 780 in 2020 to 1,095 in 2024.
- 2020: 780
- 2021: 741
- 2022: 866
- 2023: 924
- 2024: 1,095
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30-day fills
30-day fills increased 50% from 978 in 2020 to 1,471 in 2024.
- 2020: 978
- 2021: 928
- 2022: 1,073
- 2023: 1,196
- 2024: 1,471
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Part D drug cost
Part D drug cost increased 145% from $855,820 in 2020 to $2,099,494 in 2024.
- 2020: $855,820
- 2021: $1,177,631
- 2022: $1,173,853
- 2023: $1,444,354
- 2024: $2,099,494
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
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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17003
Destruction of precancer skin growth, 2-14 growths
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522 | 98 | $11.00 | $1.90 |
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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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337 | 254 | $69.44 | $61.31 |
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17000
Destruction of precancer skin growth, 1 growth
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221 | 155 | $82.43 | $44.53 |
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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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129 | 101 | $103.74 | $90.81 |
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17110
Destruction of skin growth, 1-14 growths
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95 | 79 | $100.54 | $63.20 |
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11102
Biopsy of related skin growth, first growth
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54 | 52 | $59.57 | $24.78 |
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G2211
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
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17 | 17 | $31.00 | $15.43 |
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 |
|---|---|---|---|---|---|
| Clobetasol Propionate | Clobetasol Propionate | 195 | 6,130 | $12,689.97 | 108 |
| Triamcinolone Acetonide | Triamcinolone Acetonide | 124 | 5,015 | $1,421.23 | 74 |
| Ketoconazole | Ketoconazole | 73 | 2,136 | $1,331.58 | 35 |
| Fluorouracil | Fluorouracil | 56 | 1,521 | $4,190.89 | 51 |
| Doxycycline Monohydrate | Doxycycline Monohydrate | 55 | 2,926 | $2,478.52 | 25 |
| Dupixent Syringe | Dupilumab | 46 | 1,288 | $166,431.89 | — |
| Betamethasone Diprop Augmented | Betamethasone/Propylene Glyc | 41 | 1,181 | $1,292.35 | 27 |
| Mycophenolate Mofetil | Mycophenolate Mofetil | 37 | 1,907 | $3,792.18 | — |
| Hydrocortisone | Hydrocortisone | 36 | 1,116 | $271.54 | 17 |
| Humira(Cf) Pen | Adalimumab | 29 | 812 | $202,054.16 | — |
| Prednisone | Prednisone | 26 | 737 | $114.37 | 11 |
| Dupixent Pen | Dupilumab | 26 | 784 | $113,932.50 | — |
| Skyrizi Pen | Risankizumab-Rzaa | 26 | 1,960 | $518,040.61 | — |
| Doxycycline Hyclate | Doxycycline Hyclate | 23 | 1,524 | $1,341.48 | — |
| Metronidazole | Metronidazole | 23 | 751 | $1,367.52 | 17 |
| Pimecrolimus | Pimecrolimus | 23 | 540 | $1,710.43 | — |
| Stelara | Ustekinumab | 22 | 1,512 | $347,950.63 | — |
| Methotrexate | Methotrexate Sodium | 21 | 1,394 | $148.12 | — |
| Clindamycin Phosphate | Clindamycin Phosphate | 21 | 630 | $1,013.16 | — |
| Ciclopirox | Ciclopirox Olamine | 20 | 644 | $273.76 | 13 |
| Hydroxychloroquine Sulfate | Hydroxychloroquine Sulfate | 18 | 785 | $422.53 | — |
| Taltz Syringe | Ixekizumab | 18 | 560 | $140,883.57 | — |
| Tremfya | Guselkumab | 18 | 924 | $239,138.08 | — |
| Cephalexin | Cephalexin | 16 | 284 | $74.06 | — |
| Tacrolimus | Tacrolimus | 15 | 381 | $1,031.00 | 12 |
(top 25 shown)
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: 2026-08-03NUCC Taxonomy Code: 207N00000X
A dermatologist is trained to diagnose and treat pediatric and adult patients with benign and malignant disorders of the skin, mouth, external genitalia, hair and nails, as well as a number of sexually transmitted diseases. The dermatologist has had additional training and experience in the diagnosis and treatment of skin cancers, melanomas, moles and other tumors of the skin, the management of contact dermatitis and other allergic and nonallergic skin disorders, and in the recognition of the skin manifestations of systemic (including internal malignancy) and infectious diseases. Dermatologists have special training in dermatopathology and in the surgical techniques used in dermatology. They also have expertise in the management of cosmetic disorders of the skin such as hair loss and scars and the skin changes associated with aging.
NUCC Taxonomy Code: 207Q00000X
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - DERMATOLOGY
I20121030000260
ME
7618001918
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
Mainegeneral Medical Center
149 N St, Waterville, ME 04901
Phone: 2078721000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Dermatology
Doctor of Medicine (M.D.)
Dermatology - MOHS-Micrographic Surgery
Doctor of Medicine (M.D.)
Dermatology
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Dermatology (license number reported to NPPES: ME MD19164)
Registered at 6 E CHESTNUT ST, AUGUSTA, ME 043305758 (Tel: 2076236680)
Registered at 6 E CHESTNUT ST, AUGUSTA, ME 043305758 (Tel: 2076236680)
Dermatology (license number reported to NPPES: TX N7441)
NPI status registered as active in NPPES database
Registered at 55 MIDDLE ST, AUGUSTA, ME 043305728 (Tel: 2076236680)
Registered at 55 MIDDLE ST, AUGUSTA, ME 043305728 (Tel: 2076236680)
Recorded as JONATHAN KARNES, MD
Dermatology (license number reported to NPPES: ME MD19164)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Dermatology Specialists in Augusta
Healthcare providers in AugustaMailing Address
6 E Chestnut St
Augusta, ME 043305758
Phone: 2076236680