Dr. Susan Lee Masonis, MD
- Part D claims, 2024
- 59
- Hospital affiliations
- 1
- Industry payments
- $15
- Medical group
- 1
- State license
- 1
- Practice address
- 747 Broadway, Seattle, WA 98122
- Practice phone
- Call (206) 386-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Swedish Medical Center -First Hill
Seattle, Washington
Find Dr. Masonis' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Susan Lee Masonis is an internist in Seattle, Washington
Dr. Masonis practices at Swedish Medical Center -First Hill in Seattle, Washington.
Dr. Masonis' NPI, 1124244207, was assigned on April 18, 2007. Dr. Masonis graduated from Jefferson Medical College of Thomas Jefferson University in 2001. Dr. Masonis holds Washington license MD00044807.
- NPI
- 1124244207NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688652043
- NPI enumeration date
- April 18, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (206) 386-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Susan Lee Masonis practices at Swedish Medical Center -First Hill in Seattle, Washington
Dr. Masonis' primary practice is Swedish Medical Center -First Hill, at 747 Broadway, Seattle, WA 98122 in King County. The practice phone is (206) 386-6000.
- Swedish Medical Center -First Hill747 Broadway, Seattle, WA 98122 · King CountyPhone(206) 386-6000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Susan Lee Masonis is affiliated with 2 sites of care and 1 medical group
Dr. Masonis' primary practice is Swedish Medical Center -First Hill in Seattle, Washington. Dr. Masonis is also affiliated with Swedish First Hill Campus. The medical group on file is Washington Permanente Medical Group, P.C.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Susan Lee Masonis' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Masonis practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Swedish Medical Center -First Hill | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Susan Lee Masonis is one of 2,689 internists in Washington
Internal medicine is Dr. Masonis' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Masonis is licensed in Washington.
Specialties and state licenses
- Internal medicine, WashingtonPrimary
Internists near Dr. Masonis
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. Susan Lee Masonis' patients have a median age of 65
Across all payers, Dmand AI patient panel data puts Dr. Masonis' median patient age at 65, with 75% women.
Dr. Masonis' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women75%
- Men25%
Source: Dmand AI Patient Panel Data
Dr. Susan Lee Masonis wrote 59 Medicare Part D claims in 2024
In 2024, Dr. Masonis wrote 59 Medicare Part D claims for 12 patients. 90% of them were for generic drugs. CMS names the drug for 13 of them, across 1 drug with 11 or more claims each, at $151 in total drug cost. In 2020, CMS named 43 claims across 3 drugs.
Dr. Masonis' Part D claims by kind of drug, 2024
- Generic53 claims90%
- Brand-name and other6 claims10%
Dr. Masonis' most prescribed drugs by claims, 2023
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, 2020 to 2023
- 2020
- 2023
- Claims for drugs CMS names
- 2020: 432023: 1370%
Drugs named by CMS: 1 in 2023, 3 in 2020.
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
How Dr. Susan Lee Masonis takes part in Medicare
Dr. Masonis accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Susan Lee Masonis received $15 in industry payments in 2018
CMS Open Payments shows 1 general payment to Dr. Masonis from 1 drug or device company in 2018. Food and beverage make up the largest share, 100% of the total. Gilead Sciences, Inc. paid the most, $15.
Companies that paid Dr. Masonis the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Susan Lee Masonis graduated from Jefferson Medical College of Thomas Jefferson University
Dr. Masonis graduated from Jefferson Medical College of Thomas Jefferson University in 2001.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Susan Lee Masonis's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Susan Lee Masonis
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. Susan Lee Masonis' NPI number?
Dr. Susan Lee Masonis' NPI number is 1124244207. It was assigned on April 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Susan Lee Masonis?
Dr. Susan Lee Masonis is an internist in Seattle, Washington. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Susan Lee Masonis practice?
Dr. Masonis practices at 747 Broadway, Seattle, WA 98122. Dr. Masonis' primary practice is Swedish Medical Center -First Hill in Seattle, Washington.
What is Dr. Susan Lee Masonis' office phone number?
The practice phone on file for Dr. Masonis is (206) 386-6000.
What is Dr. Susan Lee Masonis' medical license number?
Dr. Masonis holds Washington license MD00044807.
Which hospitals is Dr. Susan Lee Masonis affiliated with?
Dr. Masonis is affiliated with Swedish First Hill Campus.
What medical group is Dr. Susan Lee Masonis part of?
Dr. Masonis is linked to Washington Permanente Medical Group, P.C.
Does Dr. Susan Lee Masonis accept Medicare?
Yes. CMS lists Dr. Masonis as accepting Medicare assignment.
Where did Dr. Susan Lee Masonis go to medical school?
Dr. Masonis graduated from Jefferson Medical College of Thomas Jefferson University in 2001.
What drugs does Dr. Susan Lee Masonis prescribe most?
In 2023 Medicare Part D data, Dr. Masonis' most prescribed drugs by claims were Clopidogrel.
Has Dr. Susan Lee Masonis received payments from drug or device companies?
CMS Open Payments shows $15 in general payments to Dr. Masonis from 1 company from 2018 to 2018. The largest total came from Gilead Sciences, Inc.
How long has Dr. Susan Lee Masonis been practicing?
Dr. Masonis graduated from medical school in 2001, 25 years ago.
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