Dr. Mark Thomas Sonderman, MD

  • Seattle, WA
  • Internist
NPI1578128658
Medicare services, 2024
38
Medicare patients, 2024
31
Part D claims, 2024
72
Publications
4
MIPS score, 2024
94
Practice address
1959 NE Pacific St Box 356151, Seattle, WA 98195
Practice phone
Call (206) 598-3300
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

UW Medical Center - Montlake

Hospital · Seattle, Washington

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Dr. Mark Thomas Sonderman is an internist in Seattle, Washington

Dr. Sonderman practices at UW Medical Center - Montlake in Seattle, Washington, part of University of Washington.

Dr. Sonderman's NPI, 1578128658, was assigned on May 5, 2019. Dr. Sonderman holds Washington license MD61401126.

NPI and contact details
NPI enumeration date
May 5, 2019
NPI status
Active
Practice phone
(206) 598-3300
Professional email
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Personal email
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Mobile number
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Sex
Male
Estimated age
33
Medical school graduation
2019

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data

Dr. Mark Thomas Sonderman practices at UW Medical Center - Montlake in Seattle, Washington

Dr. Sonderman's primary practice is UW Medical Center - Montlake, at 1959 NE Pacific St Box 356151, Seattle, WA 98195 in King County. The practice phone is (206) 598-3300.

Source: Dmand AI Affiliation Data

Dr. Mark Thomas Sonderman is affiliated with 3 sites of care and 1 medical group

Dr. Sonderman's primary practice is UW Medical Center - Montlake in Seattle, Washington, part of University of Washington. The medical group on file is UW Physicians. Dmand AI also links Dr. Sonderman to 1 more hospital and 1 hospital outpatient department, each named with a free account.

See all 4 affiliations for Dr. Sonderman

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Mark Thomas Sonderman's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sonderman practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
UW Medical Center - MontlakeAvailable with a free account
+2 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Mark Thomas Sonderman is one of 2,689 internists in Washington

Internal medicine is Dr. Sonderman's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Sonderman's licenses on file in 2 states: Washington and Tennessee.

Specialties and state licenses

  • Internal medicine, WashingtonPrimaryLicense MD61401126 · taxonomy 207R00000X
  • Tennessee licenseLicense 63952

Internists near Dr. Sonderman

Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Mark Thomas Sonderman billed Medicare for 38 services in 2024

CMS data shows 38 Medicare services from Dr. Sonderman across 1 procedure code in 2024, for 31 Medicare patients. Medicare paid $2,620 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202438
Medicare patients31
Paid by Medicare$2,620
Procedure codes1

Dr. Sonderman's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 1782024: 3879%

Dr. Sonderman compared with the Washington median for internists, 2024

  • Dr. Sonderman
  • Washington median
Medicare services
38vs 36490% below
Medicare patients
31vs 16581% below
Part D claims
11vs 18294% below

Medians across 2,604 internists in Washington with Dmand AI profiles that report each measure.

Dr. Sonderman's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Sonderman

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Mark Thomas Sonderman treated 31 Medicare patients in 2024, average age 75

CMS counts 31 Medicare patients who saw Dr. Sonderman in 2024. The largest group is 75 to 84, with 15 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 3.46, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Sonderman's median patient age at 62, with 32% women.

Medicare patients, 202431
Average age75
Average risk score3.46

Dr. Sonderman's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Sonderman's Medicare patients by sex, 2024

  • Women1548%
  • Men1652%

Chronic conditions among Dr. Sonderman's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Ischemic heart disease75%
  4. Heart failure74%
  5. Chronic kidney disease71%
  6. Atrial fibrillation52%
  7. Diabetes48%
  8. Anxiety42%

Share of Medicare patients with each condition. A patient can have several.

Dr. Sonderman's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 62

Patient panel by sex, all payers

  • Women32%
  • Men67%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Mark Thomas Sonderman wrote 72 Medicare Part D claims in 2024

In 2024, Dr. Sonderman wrote 72 Medicare Part D claims for 24 patients. 85% of them were for generic drugs. CMS names the drug for 11 of them, across 1 drug with 11 or more claims each, at $40 in total drug cost. In 2022, CMS named 40 claims across 3 drugs.

Part D claims, 202472
Drugs named by CMS1
Total drug cost$40
Part D patients24

Dr. Sonderman's Part D claims by kind of drug, 2024

  • Generic61 claims85%
  • Brand-name11 claims15%

Dr. Sonderman's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2022 to 2024

  • 2022
  • 2024
Claims for drugs CMS names
2022: 402024: 1173%

Drugs named by CMS: 1 in 2024, 3 in 2022.

See all prescribing by Dr. Sonderman

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

Dr. Mark Thomas Sonderman scored 94 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 94 out of 100 for Dr. Sonderman for performance year 2024, reported through an alternative payment model (APM).

Dr. Sonderman's MIPS scores, performance year 2024

  • 94of 100Final score
  • 74.6of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Source: Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Mark Thomas Sonderman has 4 publications on record

Dmand AI links 4 papers to Dr. Sonderman, published from 2018 to 2024. 2023 was the busiest year, with 2. Dr. Sonderman has published most often in JACC Adv. Dr. Sonderman's most frequent co-authors are Quinn S. Wells, MD, Aaron Weldon Aday, MD and Nazem W. Akoum, MD.

Papers4
Years published2018 to 2024

Dr. Sonderman's papers by year, 2018 to 2024

Dr. Sonderman's most frequent co-authors

Recent publications by Dr. Sonderman

See all 4 publications and co-authors

See who Dr. Sonderman researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sonderman works with, so you can find a warm path to the right internists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Mark Thomas Sonderman received $133 in industry payments in 2024

CMS Open Payments shows 1 general payment to Dr. Sonderman from 1 drug or device company in 2024. Education make up the largest share, 100% of the total. Abbott Laboratories paid the most, $133.

Companies that paid Dr. Sonderman the most, 2024 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Sonderman

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Dr. Mark Thomas Sonderman's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesClinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Mark Thomas Sonderman

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Mark Thomas Sonderman's NPI number?

Dr. Mark Thomas Sonderman's NPI number is 1578128658. It was assigned on May 5, 2019, and it is active in the NPI Registry.

What kind of doctor is Dr. Mark Thomas Sonderman?

Dr. Mark Thomas Sonderman is an internist in Seattle, Washington. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Mark Thomas Sonderman practice?

Dr. Sonderman practices at 1959 NE Pacific St Box 356151, Seattle, WA 98195. Dr. Sonderman's primary practice is UW Medical Center - Montlake in Seattle, Washington, part of University of Washington. Dmand AI also links Dr. Sonderman to 1 hospital and 1 hospital outpatient department.

What is Dr. Mark Thomas Sonderman's office phone number?

The practice phone on file for Dr. Sonderman is (206) 598-3300.

What is Dr. Mark Thomas Sonderman's medical license number?

Dr. Sonderman holds Washington license MD61401126, one of the licenses on file in 2 states.

Which states has Dr. Mark Thomas Sonderman been licensed in?

Dmand AI has state licenses on file for Dr. Sonderman in Washington and Tennessee.

Which hospitals is Dr. Mark Thomas Sonderman affiliated with?

Dr. Sonderman practices at UW Medical Center - Montlake in Seattle, Washington. Dmand AI links Dr. Sonderman to 1 more hospital.

What medical group is Dr. Mark Thomas Sonderman part of?

Dr. Sonderman is linked to UW Physicians.

Does Dr. Mark Thomas Sonderman accept Medicare?

Yes. CMS data shows Dr. Sonderman billed Medicare for 38 services in 2024.

What is Dr. Mark Thomas Sonderman's MIPS score?

Dr. Sonderman's MIPS final score for performance year 2024 is 94 out of 100, reported through an alternative payment model (APM).

Show 7 more questionsShow fewer questions

How many Medicare patients does Dr. Mark Thomas Sonderman see?

CMS counts 31 Medicare patients who saw Dr. Sonderman in 2024, with an average age of 75.

What services does Dr. Mark Thomas Sonderman bill to Medicare?

In 2024, Dr. Sonderman's most billed Medicare services were hospital inpatient care (99232).

What drugs does Dr. Mark Thomas Sonderman prescribe most?

In 2024 Medicare Part D data, Dr. Sonderman's most prescribed drugs by claims were Atorvastatin Calcium.

Has Dr. Mark Thomas Sonderman received payments from drug or device companies?

CMS Open Payments shows $133 in general payments to Dr. Sonderman from 1 company from 2024 to 2024. The largest total came from Abbott Laboratories.

How long has Dr. Mark Thomas Sonderman been practicing?

Dr. Sonderman graduated from medical school in 2019, 7 years ago.

Does Dr. Mark Thomas Sonderman do research?

Dmand AI links 4 publications to Dr. Sonderman, published from 2018 to 2024.

Who does Dr. Mark Thomas Sonderman publish with?

Dr. Sonderman's most frequent co-authors are Quinn S. Wells, MD (2 shared papers), Aaron Weldon Aday, MD (1 shared paper) and Nazem W. Akoum, MD (1 shared paper).

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