Dr. Thomas B. Knowles, MD
- Medicare services, 2024
- 221
- Medicare patients, 2024
- 142
- Part D claims, 2024
- 70
- MIPS score, 2024
- 95
- Hospital affiliations
- 4
- Practice address
- 1015 Nw 22nd Avenue, W121, Portland, OR 97210
- Practice phone
- Call (503) 413-7682
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Knowles' professional email, personal email and mobile number
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Dr. Thomas B. Knowles is a general surgeon in Portland, Oregon
Dr. Knowles practices at Legacy Good Samaritan Medical Center in Portland, Oregon, part of Legacy Health.
Dr. Knowles' NPI, 1114337466, was assigned on May 7, 2014. Dr. Knowles graduated from Creighton University School of Medicine in 2014. Dr. Knowles holds Washington license MD60946286.
- NPI
- 1114337466NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678790425
- NPI enumeration date
- May 7, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (503) 413-7682
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Thomas B. Knowles practices at Legacy Good Samaritan Medical Center in Portland, Oregon
Dr. Knowles' primary practice is Legacy Good Samaritan Medical Center, at 1015 Nw 22nd Avenue, W121, Portland, OR 97210 in Multnomah County. The practice phone is (503) 413-7682.
- Legacy Good Samaritan Medical Center1015 Nw 22nd Avenue, W121, Portland, OR 97210 · Multnomah CountyPhone(503) 413-7682
Source: Dmand AI Affiliation Data
Dr. Thomas B. Knowles is affiliated with 5 sites of care and 1 medical group
Dr. Knowles' primary practice is Legacy Good Samaritan Medical Center in Portland, Oregon, part of Legacy Health. Dr. Knowles is also affiliated with Legacy Salmon Creek Medical Center. The medical group on file is Legacy Medical Group-Northwest. Dmand AI also links Dr. Knowles to 2 more hospitals and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Thomas B. Knowles' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knowles practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Legacy Good Samaritan Medical Center | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas B. Knowles is one of 438 general surgeons in Oregon
Surgery is Dr. Knowles' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Knowles' licenses on file in 2 states: Washington and Oregon.
Specialties and state licenses
- Surgery, WashingtonPrimary
- Oregon license
General surgeons near Dr. Knowles
Counts of general surgeons 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. Thomas B. Knowles billed Medicare for 221 services in 2024
CMS data shows 221 Medicare services from Dr. Knowles across 6 procedure codes in 2024, for 142 Medicare patients. Medicare paid $17,323 for them.
Dr. Knowles' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1662024: 20222%
- Surgery
- 2023: 182024: 196%
Where Dr. Knowles' Medicare services took place, 2024
- In an office12054%
- In a facility10146%
Dr. Knowles compared with the Oregon median for general surgeons, 2024
- Dr. Knowles
- Oregon median
- Medicare services
- 221vs 832.7 times
- Medicare patients
- 142vs 8273% above
- Part D claims
- 41vs 4713% below
Medians across 433 general surgeons in Oregon with Dmand AI profiles that report each measure.
Dr. Knowles' 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas B. Knowles treated 142 Medicare patients in 2024, average age 72
CMS counts 142 Medicare patients who saw Dr. Knowles in 2024. The largest group is 65 to 74, with 64 patients. 75% of them have high blood pressure, and 68% have high cholesterol. 20% are also on Medicaid. Their average risk score is 1.55, 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. Knowles' median patient age at 67, with 59% women.
Dr. Knowles' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Knowles' Medicare patients by sex, 2024
- Women6747%
- Men7553%
Chronic conditions among Dr. Knowles' Medicare patients, 2024
- High blood pressure75%
- High cholesterol68%
- Arthritis41%
- Mood disorders35%
- Diabetes32%
- Anxiety31%
- Depression30%
- Ischemic heart disease28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Knowles' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas B. Knowles wrote 70 Medicare Part D claims in 2024
In 2024, Dr. Knowles wrote 70 Medicare Part D claims for 36 patients. 96% of them were for generic drugs. CMS names the drug for 41 of them, across 2 drugs with 11 or more claims each, at $358 in total drug cost. In 2023, CMS named 28 claims across 1 drug.
Dr. Knowles' Part D claims by kind of drug, 2024
- Generic67 claims96%
- Brand-name and other3 claims4%
Dr. Knowles' 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.
Drug classes CMS tracks in Dr. Knowles' Part D claims, 2024
- Opioids29%20 of 70 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 282024: 4146%
Drugs named by CMS: 2 in 2024, 1 in 2023.
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. Thomas B. Knowles scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Knowles for performance year 2024, reported through an alternative payment model (APM). Dr. Knowles accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Knowles as offering telehealth. CMS counts 64 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Knowles, more than 68% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Knowles' MIPS scores, performance year 2024
- 95of 100Final score
- 77.2of 100Quality
- 99of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Where Dr. Knowles ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 68th percentile64 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Hernia repair (minimally invasive): 1 to 10 procedures (CMS shows small counts as a range)
Removal of tissue: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Thomas B. Knowles received $4,764 in industry payments from 2021 to 2025
CMS Open Payments shows 40 general payments to Dr. Knowles from 9 drug and device companies from 2021 to 2025. Travel and lodging make up the largest share, 74% of the total. Intuitive Surgical, Inc. paid the most, $4,246.
General payments to Dr. Knowles by program year, 2021 to 2025
General payments to Dr. Knowles by kind, 2021 to 2025
- Travel and lodging$3,51374%
- Food and beverage$1,23526%
- Gifts$160%
Companies that paid Dr. Knowles the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas B. Knowles graduated from Creighton University School of Medicine
Dr. Knowles graduated from Creighton University School of Medicine in 2014.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Thomas B. Knowles'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (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. Thomas B. Knowles
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. Thomas B. Knowles' NPI number?
Dr. Thomas B. Knowles' NPI number is 1114337466. It was assigned on May 7, 2014, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas B. Knowles?
Dr. Thomas B. Knowles is a general surgeon in Portland, Oregon. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Thomas B. Knowles practice?
Dr. Knowles practices at 1015 Nw 22nd Avenue, W121, Portland, OR 97210. Dr. Knowles' primary practice is Legacy Good Samaritan Medical Center in Portland, Oregon, part of Legacy Health. Dmand AI also links Dr. Knowles to 2 hospitals and 1 group practice or clinic.
What is Dr. Thomas B. Knowles' office phone number?
The practice phone on file for Dr. Knowles is (503) 413-7682.
What is Dr. Thomas B. Knowles' medical license number?
Dr. Knowles holds Washington license MD60946286, one of the licenses on file in 2 states.
Which states has Dr. Thomas B. Knowles been licensed in?
Dmand AI has state licenses on file for Dr. Knowles in Washington and Oregon.
Which hospitals is Dr. Thomas B. Knowles affiliated with?
Dr. Knowles practices at Legacy Good Samaritan Medical Center in Portland, Oregon. Dr. Knowles is also affiliated with Legacy Salmon Creek Medical Center. Dmand AI links Dr. Knowles to 2 more hospitals.
What medical group is Dr. Thomas B. Knowles part of?
Dr. Knowles is linked to Legacy Medical Group-Northwest.
Does Dr. Thomas B. Knowles accept Medicare?
Yes. CMS data shows Dr. Knowles billed Medicare for 221 services in 2024, and Dr. Knowles accepts Medicare assignment.
Does Dr. Thomas B. Knowles offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Knowles as offering telehealth services.
Show 7 more questionsShow fewer questions
What is Dr. Thomas B. Knowles' MIPS score?
Dr. Knowles' MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Thomas B. Knowles see?
CMS counts 142 Medicare patients who saw Dr. Knowles in 2024, with an average age of 72.
What services does Dr. Thomas B. Knowles bill to Medicare?
In 2024, Dr. Knowles' most billed Medicare services were office visit, new patient (99204), hospital inpatient care (99231) and office visit, established patient (99213).
Where did Dr. Thomas B. Knowles go to medical school?
Dr. Knowles graduated from Creighton University School of Medicine in 2014.
What drugs does Dr. Thomas B. Knowles prescribe most?
In 2024 Medicare Part D data, Dr. Knowles' most prescribed drugs by claims were Omeprazole and Oxycodone HCl.
Has Dr. Thomas B. Knowles received payments from drug or device companies?
CMS Open Payments shows $4,764 in general payments to Dr. Knowles from 9 companies from 2021 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. Thomas B. Knowles been practicing?
Dr. Knowles graduated from medical school in 2014, 12 years ago.
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