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Dr. Angela Trissandra Marshall-Olson, DO
NPI1841493988PAC ID4284771429
- Medicare services, 2024
- 750
- Medicare patients, 2024
- 166
- Part D claims, 2024
- 5,706
- Publications
- 1
- Hospital affiliations
- 5
- Practice address
- 1130 Nw 22nd Ave, Portland, OR 97210
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Ngc Endoscopy Services, LLC - HOPD
Acute Care Hospital outpatient department · Portland, Oregon
Find Dr. Marshall-Olson's professional email, personal email and mobile number
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Dr. Angela Trissandra Marshall-Olson is an internist in Portland, Oregon
Dr. Marshall-Olson practices at Ngc Endoscopy Services, LLC - HOPD in Portland, Oregon.
Dr. Marshall-Olson's NPI, 1841493988, was assigned on June 7, 2007. Dr. Marshall-Olson holds Oregon license DO29017.
NPI and contact details
- NPI
- 1841493988NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284771429
- NPI enumeration date
- June 7, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Angela Trissandra Marshall-Olson practices at Ngc Endoscopy Services, LLC - HOPD in Portland, Oregon
Dr. Marshall-Olson's primary practice is Ngc Endoscopy Services, LLC - HOPD, at 1130 Nw 22nd Ave, Portland, OR 97210.
- Ngc Endoscopy Services, LLC - HOPD1130 Nw 22nd Ave, Portland, OR 97210
Source: Dmand AI Affiliation Data
Dr. Angela Trissandra Marshall-Olson is affiliated with 9 sites of care and 2 medical groups
Dr. Marshall-Olson's primary practice is Ngc Endoscopy Services, LLC - HOPD in Portland, Oregon. Dr. Marshall-Olson is also affiliated with OHSU Hospital. The medical group on file is Legacy Medical Group-Northwest. Dmand AI also links Dr. Marshall-Olson to 4 more hospitals, 2 group practices and clinics, 1 ambulatory surgery center and 1 medical group, each named with a free account.
Ngc Endoscopy Services, LLC - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Angela Trissandra Marshall-Olson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marshall-Olson practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ngc Endoscopy Services, LLC - HOPD | Available with a free account |
| +8 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Angela Trissandra Marshall-Olson is one of 1,680 internists in Oregon
Internal medicine is Dr. Marshall-Olson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Marshall-Olson is licensed in Oregon.
Specialties and state licenses
- Internal medicine, OregonPrimary
Internists near Dr. Marshall-Olson
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. Angela Trissandra Marshall-Olson billed Medicare for 750 services in 2024
CMS data shows 750 Medicare services from Dr. Marshall-Olson across 12 procedure codes in 2024, for 166 Medicare patients. Medicare paid $33,897 for them. Every service was in an office.
Medicare services, 2024750
Medicare patients166
Paid by Medicare$33,897
Procedure codes12
Dr. Marshall-Olson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 702024: 332374%
- Office and hospital visits
- 2023: 2022024: 31757%
- Tests and treatments
- 2023: 362024: 6683%
- Surgery
- 2023: 792024: 3556%
Dr. Marshall-Olson compared with the Oregon median for internists, 2024
- Dr. Marshall-Olson
- Oregon median
- Medicare services
- 750vs 3002.5 times
- Medicare patients
- 166vs 13226% above
- Part D claims
- 4,903vs 22222.1 times
Medians across 1,791 internists in Oregon with Dmand AI profiles that report each measure.
Dr. Marshall-Olson'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Marshall-Olson and other internists in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Angela Trissandra Marshall-Olson treated 166 Medicare patients in 2024, average age 73
CMS counts 166 Medicare patients who saw Dr. Marshall-Olson in 2024. The largest group is 65 to 74, with 90 patients. 64% of them have high cholesterol, and 54% have high blood pressure. 10% are also on Medicaid. Their average risk score is 0.86, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Marshall-Olson's median patient age at 69, with 75% women.
Medicare patients, 2024166
Average age73
Average risk score0.86
Also on Medicaid10%
Dr. Marshall-Olson's Medicare patients by age, 2024
Dr. Marshall-Olson's Medicare patients by sex, 2024
- Women12978%
- Men3722%
Chronic conditions among Dr. Marshall-Olson's Medicare patients, 2024
- High cholesterol64%
- High blood pressure54%
- Arthritis37%
- Mood disorders23%
- Osteoporosis23%
- Anxiety22%
- Depression19%
- Cancer17%
Share of Medicare patients with each condition. A patient can have several.
Dr. Marshall-Olson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women75%
- Men25%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Angela Trissandra Marshall-Olson wrote 5,706 Medicare Part D claims in 2024
In 2024, Dr. Marshall-Olson wrote 5,706 Medicare Part D claims for 421 patients. 87% of them were for generic drugs. CMS names the drug for 4,903 of them, across 111 drugs with 11 or more claims each, at $507,130 in total drug cost. In 2023, CMS named 3,288 claims across 90 drugs.
Part D claims, 20245,706
Drugs named by CMS111
Total drug cost$507,130
Part D patients421
Dr. Marshall-Olson's Part D claims by kind of drug, 2024
- Generic4,979 claims87%
- Brand-name706 claims12%
- Other21 claims0%
Dr. Marshall-Olson'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.
Drug classes CMS tracks in Dr. Marshall-Olson's Part D claims, 2024
- Opioids4%234 of 5,706 claims
- Antibiotics1%85 of 5,706 claims
- Antipsychotics, patients 65 and over1%75 of 5,706 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: 3,2882024: 4,90349%
Drugs named by CMS: 111 in 2024, 90 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. Angela Trissandra Marshall-Olson offers telehealth to Medicare patients
Dr. Marshall-Olson accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Marshall-Olson as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Angela Trissandra Marshall-Olson has 1 publication on record
Dmand AI links 1 paper to Dr. Marshall-Olson in 2012. Dr. Marshall-Olson's most frequent co-authors are Erin Elizabeth Epson, MD and Kevin Loring Winthrop, MD.
Papers1
Dr. Marshall-Olson's most frequent co-authors
Recent publications by Dr. Marshall-Olson
See who Dr. Marshall-Olson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Marshall-Olson works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Angela Trissandra Marshall-Olson received $2,957 in industry payments from 2016 to 2024
CMS Open Payments shows 201 general payments to Dr. Marshall-Olson from 30 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 100% of the total. EMD Serono, Inc. paid the most, $443.
General payments to Dr. Marshall-Olson by program year, 2016 to 2024
Companies that paid Dr. Marshall-Olson the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Angela Trissandra Marshall-Olson'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Angela Trissandra Marshall-Olson
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. Angela Trissandra Marshall-Olson's NPI number?
Dr. Angela Trissandra Marshall-Olson's NPI number is 1841493988. It was assigned on June 7, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Angela Trissandra Marshall-Olson?
Dr. Angela Trissandra Marshall-Olson is an internist in Portland, Oregon. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Angela Trissandra Marshall-Olson practice?
Dr. Marshall-Olson practices at 1130 Nw 22nd Ave, Portland, OR 97210. Dr. Marshall-Olson's primary practice is Ngc Endoscopy Services, LLC - HOPD in Portland, Oregon. Dmand AI also links Dr. Marshall-Olson to 4 hospitals, 2 group practices and clinics, 1 ambulatory surgery center and 1 medical group.
What is Dr. Angela Trissandra Marshall-Olson's medical license number?
Dr. Marshall-Olson holds Oregon license DO29017.
Which hospitals is Dr. Angela Trissandra Marshall-Olson affiliated with?
Dr. Marshall-Olson is affiliated with OHSU Hospital. Dmand AI links Dr. Marshall-Olson to 4 more hospitals.
What medical group is Dr. Angela Trissandra Marshall-Olson part of?
Dr. Marshall-Olson is linked to Legacy Medical Group-Northwest. Dmand AI links Dr. Marshall-Olson to 1 more medical group.
Does Dr. Angela Trissandra Marshall-Olson accept Medicare?
Yes. CMS data shows Dr. Marshall-Olson billed Medicare for 750 services in 2024, and Dr. Marshall-Olson accepts Medicare assignment.
Does Dr. Angela Trissandra Marshall-Olson offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Marshall-Olson as offering telehealth services.
How many Medicare patients does Dr. Angela Trissandra Marshall-Olson see?
CMS counts 166 Medicare patients who saw Dr. Marshall-Olson in 2024, with an average age of 73.
What services does Dr. Angela Trissandra Marshall-Olson bill to Medicare?
In 2024, Dr. Marshall-Olson's most billed Medicare services were medicare service (G2211), office visit, established patient (99214) and office visit, established patient (99215).
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What drugs does Dr. Angela Trissandra Marshall-Olson prescribe most?
In 2024 Medicare Part D data, Dr. Marshall-Olson's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Losartan Potassium.
Has Dr. Angela Trissandra Marshall-Olson received payments from drug or device companies?
CMS Open Payments shows $2,957 in general payments to Dr. Marshall-Olson from 30 companies from 2016 to 2024. The largest total came from EMD Serono, Inc.
How long has Dr. Angela Trissandra Marshall-Olson been practicing?
Dr. Marshall-Olson graduated from medical school in 2006, 20 years ago.
Does Dr. Angela Trissandra Marshall-Olson do research?
Dmand AI links 1 publication to Dr. Marshall-Olson.
Who does Dr. Angela Trissandra Marshall-Olson publish with?
Dr. Marshall-Olson's most frequent co-authors are Erin Elizabeth Epson, MD (1 shared paper) and Kevin Loring Winthrop, MD (1 shared paper).
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