Michael Corsilles , PA-C
Physician Assistant • Seattle, WA
8639 36th Ave Sw
Seattle, WA 981263609
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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Michael Corsilles is listed in NPPES under Physician Assistant.
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NPI assigned on February 15, 2007; this date does not establish years in practice.
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Published CMS data list 105 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 99214 — Established patient outpatient office visit: 63 service units.
- 99213 — Established patient outpatient office visit: 42 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See the full table · Guide: How to read Medicare Part B data
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Published CMS data list 26 Medicare Part D prescriptions, including refills, in 2023.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Published rows only; this is not a quality measure.
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Published Part D records, 2023:
- Amlodipine Besylate — 14 prescription fills, including refills.
- Sertraline Hcl — 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2023. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table · Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 93 in 2017 to 105 in 2022.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017–2022.
Practice Location & Contact Primary Location
8639 36th Ave Sw
Seattle, WA 981263609
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
What Public CMS Data Show
Physician Assistant: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $9,773 in 2022
The total amount Medicare approved for these services in 2022. 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, 2022.
Paid by Medicare
About $6,829 in 2022
The part of the Medicare-allowed amount that Medicare itself paid in 2022, 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, 2022.
30-day fills
38 standardized 30-day fills in 2023
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
$131 in 2023
The total cost of these prescriptions in 2023, 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, 2023.
Open Payments general payments, program year 2025
All general payments: $159.45 across 8 records.
By nature of payment
- Food and Beverage: $159.45 across 8 records.
Reporting-company totals (3 largest of 6)
- Aimmune Therapeutics, Inc.: $42.41 across 2 records.
- Antares Pharma, Inc.: $34.28 across 2 records.
- Salix Pharmaceuticals, a division of Bausch Health US, LLC: $24.84 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).
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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.
Compared with the same specialty in Seattle and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Michael Corsilles are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Michael Corsilles are from 2023.
828 active clinicians are listed under Physician Assistant with a practice address in Seattle, WA (3,718 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Seattle
19% of these 828 clinicians have the CMS telehealth indicator.
67.3% of these 828 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 increased 13% from 93 in 2017 to 105 in 2022.
- 2017: 93
- 2018: 76
- 2019: 103
- 2021: 116
- 2022: 105
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Medicare-allowed amount
Medicare-allowed amount increased 44% from $6,801 in 2017 to $9,773 in 2022.
- 2017: $6,801
- 2018: $6,255
- 2019: $8,260
- 2021: $13,337
- 2022: $9,773
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Paid by Medicare
Paid by Medicare increased 31% from $5,194 in 2017 to $6,829 in 2022.
- 2017: $5,194
- 2018: $4,011
- 2019: $5,999
- 2021: $9,684
- 2022: $6,829
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 88% from 218 in 2019 to 26 in 2023.
- 2019: 218
- 2020: 12
- 2021: 27
- 2022: 55
- 2023: 26
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30-day fills
30-day fills decreased 90% from 371 in 2019 to 38 in 2023.
- 2019: 371
- 2020: 18
- 2021: 43
- 2022: 78
- 2023: 38
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Part D drug cost
Part D drug cost decreased 96% from $3,327 in 2019 to $131 in 2023.
- 2019: $3,327
- 2020: $46
- 2021: $247
- 2022: $1,025
- 2023: $131
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $93.39 in 2021 to $159.45 in 2025.
- 2021: $93.39
- 2022: $134.51
- 2023: $211.67
- 2024: $426.72
- 2025: $159.45
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2023), 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 $159.45.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Aimmune Therapeutics, Inc. |
Food and Beverage
In-kind items and services
|
ZENPEP | General | $25.33 |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC |
Food and Beverage
In-kind items and services
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XIFAXAN | General | $24.84 |
| Fidia Pharma USA Inc. |
Food and Beverage
In-kind items and services
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HYMOVIS | General | $22.93 |
| HOLOGIC INC |
Food and Beverage
In-kind items and services
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APTIMA | General | $19.91 |
| Antares Pharma, Inc. |
Food and Beverage
In-kind items and services
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XYOSTED | General | $17.30 |
| Aimmune Therapeutics, Inc. |
Food and Beverage
In-kind items and services
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ZENPEP | General | $17.08 |
| Antares Pharma, Inc. |
Food and Beverage
In-kind items and services
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XYOSTED | General | $16.98 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
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QULIPTA | General | $15.08 |
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 2016–2021 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, 2017–2022; 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
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63 | 26 | $216.00 | $105.66 |
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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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42 | 21 | $151.00 | $74.20 |
Source: CMS Part B by Provider and Service, 2022; 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 2023.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Amlodipine Besylate | Amlodipine Besylate | 14 | 720 | $83.92 | — |
| Sertraline Hcl | Sertraline Hcl | 12 | 420 | $46.87 | — |
Source: CMS Part D by Provider and Drug, 2023; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 363A00000X
A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.
NUCC Taxonomy Code: 175F00000X
Diagnoses, treats, and cares for patients, using system of practice that bases treatment of physiological functions and abnormal conditions on natural laws governing human body: Utilizes physiological, psychological, and mechanical methods, such as air, water, light, heat, earth, phototherapy, food and herb therapy, psychotherapy, electrotherapy, physiotherapy, minor and orificial surgery, mechanotherapy, naturopathic corrections and manipulation, and natural methods or modalities, together with natural medicines, natural processed foods, and herbs and nature's remedies. Excludes major surgery, therapeutic use of x ray and radium, and use of drugs, except those assimilable substances containing elements or compounds which are components of body tissues and are physiologically compatible to body processes for maintenance of life.
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 2100 116TH AVE NE, BELLEVUE, WA 980043016 (Tel: 4254671314)
Naturopath (license number reported to NPPES: WA NT00001187)
NPI status registered as active in NPPES database
Registered at 8639 36TH AVE SW, SEATTLE, WA 981263609 (Tel: 2063805202)
Registered at 8639 36TH AVE SW, SEATTLE, WA 981263609
Recorded as MICHAEL CORSILLES, PA-C
Physician Assistant (license number reported to NPPES: WA PA60191026)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Seattle
- Tuan Nguyen, PA-C
- Garret Kingston
- Scott Sato, PA
- Ashlan Applegate, PA-C
- Nerina Mcdonald, PA-C
- Todd Brugos, PA-C
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Mailing Address
2100 116th Ave Ne
Bellevue, WA 980043016
Phone: 4254671314