Michael Shane Siem , PA-C
Physician Assistant โข Bellevue, WA
1035 116th Ave Ne
Bellevue, WA 980044604
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 October 30, 2008; this date does not establish years in practice.
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Published CMS data list 94 Original Medicare Part B services in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Published rows only; this is not a quality measure.
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Published Part B service records, 2022:
- 32555 โ Aspiration of fluid from chest cavity using imaging guidance: 34 service units.
- 10005 โ Fine needle aspiration biopsy using ultrasound guidance, first growth: 19 service units.
- 77002 โ Fluoroscopic guidance for needle placement: 16 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2022. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2021 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2022). CPT notice
See all 5 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 79 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Diclofenac Sodium โ 36 prescription fills, including refills.
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) โ 20 prescription fills, including refills.
- Gabapentin โ 12 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 4 records in the table ยท Guide: How to read Medicare Part D prescriber data
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Medicare Part B services went from 250 in 2018 to 94 in 2022.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2018โ2022.
Practice Location & Contact Primary Location
1035 116th Ave Ne
Bellevue, WA 980044604
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 $6,758 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 โ by Provider and Service, 2022.
Paid by Medicare
About $5,417 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 โ by Provider and Service, 2022.
30-day fills
81 standardized 30-day fills in 2017
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
$1,078 in 2017
The total cost of these prescriptions in 2017, 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 โ by Provider and Drug, 2017.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $26.42 in 2025
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2025.
NPI first issued
2008
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, โDoes your provider accept Medicare as full payment?โ
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.
Can order Medicare-covered services
CMS lists Michael Siem as eligible to order or refer durable medical equipment (DME) 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 Bellevue and Washington
Billing and prescribing volume is not a quality rating.
Medicare Part B
Comparisons use 2024 data. The latest CMS data for Michael Siem are from 2022.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Michael Siem are from 2017.
83 active clinicians are listed under Physician Assistant with a practice address in Bellevue, WA (3,718 in Washington).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Bellevue
19.3% of these 83 clinicians have the CMS telehealth indicator.
67.5% of these 83 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 62% from 250 in 2018 to 94 in 2022.
- 2018: 250
- 2019: 49
- 2020: 55
- 2021: 175
- 2022: 94
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Medicare-allowed amount
Medicare-allowed amount decreased 61% from $17,191 in 2018 to $6,758 in 2022.
- 2018: $17,191
- 2019: $3,415
- 2020: $5,430
- 2021: $13,119
- 2022: $6,758
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Paid by Medicare
Paid by Medicare decreased 60% from $13,591 in 2018 to $5,417 in 2022.
- 2018: $13,591
- 2019: $2,667
- 2020: $4,358
- 2021: $10,466
- 2022: $5,417
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 82% from 440 in 2013 to 79 in 2017.
- 2013: 440
- 2014: 404
- 2015: 319
- 2016: 254
- 2017: 79
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30-day fills
30-day fills decreased 84% from 492 in 2013 to 81 in 2017.
- 2013: 492
- 2014: 432
- 2015: 347
- 2016: 265
- 2017: 81
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Part D drug cost
Part D drug cost decreased 83% from $6,161 in 2013 to $1,078 in 2017.
- 2013: $6,161
- 2014: $6,096
- 2015: $4,180
- 2016: $3,127
- 2017: $1,078
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $18.56 in 2021 to $26.42 in 2025.
- 2021: $18.56
- 2022: $21.10
- 2025: $26.42
Sources: CMS Medicare Physician & Other Practitioners (2022), CMS Medicare Part D Prescribers (2017), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท 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 โ December 31, 2025): fewer than 11 records totaling $26.42.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
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Gel-One Cross-linked Hyaluronate | General | $26.42 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2021 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 โ by Provider and Service data, 2017โ2022; 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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32555
Aspiration of fluid from chest cavity using imaging guidance
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34 | 29 | $359.00 | $100.61 |
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10005
Fine needle aspiration biopsy using ultrasound guidance, first growth
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19 | 19 | $238.00 | $68.05 |
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77002
Fluoroscopic guidance for needle placement
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16 | 16 | $100.00 | $23.42 |
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20610
Aspiration and/or injection of fluid from large joint
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14 | 14 | $199.00 | $56.20 |
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62328
Removal of spinal fluid with lower back spinal tap for diagnostic test using imaging guidance
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11 | 11 | $294.00 | $80.23 |
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 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Diclofenac Sodium | Diclofenac Sodium | 36 | 1,013 | $613.84 | 26 |
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 20 | 138 | $144.29 | 19 |
| Gabapentin | Gabapentin | 12 | 271 | $114.55 | โ |
| Oxycodone Hcl | Oxycodone Hcl | 11 | 113 | $205.07 | โ |
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-12-10NUCC 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: 363AS0400X
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Hospitalist
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Anesthesiology
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Internal Medicine - Critical Care Medicine
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 1035 116TH AVE NE, BELLEVUE, WA 980044604 (Tel: 4256885573)
NPI status registered as active in NPPES database
Registered at 19020 33RD AVE W STE 210, LYNNWOOD, WA 980364748 (Tel: 4255631500)
Registered at 19020 33RD AVE W STE 210, LYNNWOOD, WA 980364748 (Tel: (425) 563-1500)
Recorded as MICHAEL SIEM, PA-C
Physician Assistant (license number reported to NPPES: WA PA60056591)
NPI status registered as active in NPPES database
Registered at 1231 116TH AVE NE, SUITE 750, BELLEVUE, WA 980043804 (Tel: 4254553600)
Registered at 805 MADISON ST, SUITE 901, SEATTLE, WA 981041172 (Tel: 2062648100)
Recorded as MICHAEL SIEM, PA-C
Physician Assistant
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Physician Assistants in Bellevue
- Marianne Wahba, PA-C
- Jessica Marie, PA-C
- Sarah Chou, PA-C
- Laura Zaccari, PA
- Jessica Sandie, PA-C
- Dror Holzman, PA
Mailing Address
19020 33rd Ave W Ste 210
Lynnwood, WA 980364748
Phone: 4255631500