Dr. Richard Derrick Knowles, MD
- Medicare services, 2024
- 802
- Medicare patients, 2024
- 252
- Part D claims, 2024
- 2,310
- Hospital affiliations
- 2
- Industry payments
- $1,635
- Practice address
- 4805 NE Glisan Street, Portland, OR 97213
- Practice phone
- Call (503) 215-1111
- 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. Richard Derrick Knowles is a family medicine physician in Portland, Oregon
Dr. Knowles practices at Providence Portland Medical Center in Portland, Oregon, part of Providence Health & Services.
Dr. Knowles' NPI, 1225113236, was assigned on October 26, 2006. Dr. Knowles holds Oregon license MD195896.
- NPI
- 1225113236NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8820062656
- NPI enumeration date
- October 26, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (503) 215-1111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 51
- Medical school graduation
- 2001
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Richard Derrick Knowles practices at Providence Portland Medical Center in Portland, Oregon
Dr. Knowles' primary practice is Providence Portland Medical Center, at 4805 NE Glisan Street, Portland, OR 97213 in Multnomah County. The practice phone is (503) 215-1111.
- Providence Portland Medical Center4805 NE Glisan Street, Portland, OR 97213 · Multnomah CountyPhone(503) 215-1111
Source: Dmand AI Affiliation Data
Dr. Richard Derrick Knowles is affiliated with 3 sites of care and 1 medical group
Dr. Knowles' primary practice is Providence Portland Medical Center in Portland, Oregon, part of Providence Health & Services. Dr. Knowles is also affiliated with PeaceHealth Southwest Medical Center. The medical group on file is Sea Mar Community Health Centers. Dmand AI also links Dr. Knowles to 1 more community health center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Richard Derrick Knowles' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Knowles practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence Portland Medical Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Richard Derrick Knowles is one of 2,398 family medicine physicians in Oregon
Family medicine is Dr. Knowles' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dmand AI has Dr. Knowles' licenses on file in 2 states: Oregon and Washington.
Specialties and state licenses
- Family medicine, OregonPrimary
- Washington license
Family medicine physicians near Dr. Knowles
Counts of family medicine physicians 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. Richard Derrick Knowles billed Medicare for 802 services in 2024
CMS data shows 802 Medicare services from Dr. Knowles across 10 procedure codes in 2024, for 252 Medicare patients. Medicare paid $36,962 for them. Every service was in an office.
Dr. Knowles' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4712024: 4671%
- Tests and treatments
- 2023: 2982024: 22624%
- Other services
- 2023: 332024: 74124%
- Lab and pathology
- 2023: 182024: 2328%
- Surgery
- 2023: 462024: 1274%
Dr. Knowles compared with the Oregon median for family medicine physicians, 2024
- Dr. Knowles
- Oregon median
- Medicare services
- 802vs 2063.9 times
- Medicare patients
- 252vs 992.5 times
- Part D claims
- 1,666vs 7812.1 times
Medians across 2,515 family medicine physicians 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Knowles and other family medicine physicians in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Richard Derrick Knowles treated 252 Medicare patients in 2024, average age 72
CMS counts 252 Medicare patients who saw Dr. Knowles in 2024. The largest group is 65 to 74, with 127 patients. 67% of them have high blood pressure, and 49% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.27, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Knowles' median patient age at 53, with 53% women.
Dr. Knowles' Medicare patients by age, 2024
Dr. Knowles' Medicare patients by sex, 2024
- Women12951%
- Men12349%
Chronic conditions among Dr. Knowles' Medicare patients, 2024
- High blood pressure67%
- High cholesterol49%
- Arthritis35%
- Diabetes28%
- Mood disorders27%
- Depression25%
- Chronic kidney disease22%
- Anxiety20%
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 53
Patient panel by sex, all payers
- Women53%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Richard Derrick Knowles wrote 2,310 Medicare Part D claims in 2024
In 2024, Dr. Knowles wrote 2,310 Medicare Part D claims for 254 patients. 86% of them were for generic drugs. CMS names the drug for 1,666 of them, across 61 drugs with 11 or more claims each, at $177,972 in total drug cost. In 2023, CMS named 1,496 claims across 57 drugs.
Dr. Knowles' Part D claims by kind of drug, 2024
- Generic1,988 claims86%
- Brand-name and other322 claims14%
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
- Opioids9%208 of 2,310 claims
- Antibiotics2%44 of 2,310 claims
- Antipsychotics, patients 65 and over2%47 of 2,310 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: 1,4962024: 1,66611%
Drugs named by CMS: 61 in 2024, 57 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. Richard Derrick Knowles offers telehealth to Medicare patients
Dr. Knowles accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Knowles as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Richard Derrick Knowles received $1,635 in industry payments from 2016 to 2025
CMS Open Payments shows 102 general payments to Dr. Knowles from 22 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 94% of the total. AstraZeneca Pharmaceuticals LP paid the most, $230.
General payments to Dr. Knowles by program year, 2016 to 2025
General payments to Dr. Knowles by kind, 2016 to 2025
- Food and beverage$1,53394%
- Education$1026%
Companies that paid Dr. Knowles the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Richard Derrick 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. Richard Derrick 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. Richard Derrick Knowles' NPI number?
Dr. Richard Derrick Knowles' NPI number is 1225113236. It was assigned on October 26, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Richard Derrick Knowles?
Dr. Richard Derrick Knowles is a family medicine physician in Portland, Oregon. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Richard Derrick Knowles practice?
Dr. Knowles practices at 4805 NE Glisan Street, Portland, OR 97213. Dr. Knowles' primary practice is Providence Portland Medical Center in Portland, Oregon, part of Providence Health & Services. Dmand AI also links Dr. Knowles to 1 community health center.
What is Dr. Richard Derrick Knowles' office phone number?
The practice phone on file for Dr. Knowles is (503) 215-1111.
What is Dr. Richard Derrick Knowles' medical license number?
Dr. Knowles holds Oregon license MD195896, one of the licenses on file in 2 states.
Which states has Dr. Richard Derrick Knowles been licensed in?
Dmand AI has state licenses on file for Dr. Knowles in Oregon and Washington.
Which hospitals is Dr. Richard Derrick Knowles affiliated with?
Dr. Knowles practices at Providence Portland Medical Center in Portland, Oregon. Dr. Knowles is also affiliated with PeaceHealth Southwest Medical Center.
What medical group is Dr. Richard Derrick Knowles part of?
Dr. Knowles is linked to Sea Mar Community Health Centers.
Does Dr. Richard Derrick Knowles accept Medicare?
Yes. CMS data shows Dr. Knowles billed Medicare for 802 services in 2024, and Dr. Knowles accepts Medicare assignment.
Does Dr. Richard Derrick Knowles offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Knowles as offering telehealth services.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. Richard Derrick Knowles see?
CMS counts 252 Medicare patients who saw Dr. Knowles in 2024, with an average age of 72.
What services does Dr. Richard Derrick Knowles bill to Medicare?
In 2024, Dr. Knowles' most billed Medicare services were office visit, established patient (99214), health assessment (96127) and office visit, established patient (99213).
What drugs does Dr. Richard Derrick Knowles prescribe most?
In 2024 Medicare Part D data, Dr. Knowles' most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Hydrocodone-Acetaminophen.
Has Dr. Richard Derrick Knowles received payments from drug or device companies?
CMS Open Payments shows $1,635 in general payments to Dr. Knowles from 22 companies from 2016 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Richard Derrick Knowles been practicing?
Dr. Knowles graduated from medical school in 2001, 25 years ago.
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