Angela Trissandra Marshall-Olson, D.O.
Internal Medicine Physician · Portland, OR
Angela Trissandra Marshall-Olson, D.O. is an internal medicine physician with a practice address in Portland, Oregon, and NPI 1841493988, issued on Jun 7, 2007. Check the license (Oregon DO29017, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Angela Trissandra Marshall-Olson
- Credential
- D.O.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- DO29017 OR
Self-reported in NPPES; status is on the state search - Practice location
- 1200 NW 23RD Ave, Portland, OR 97210
- Phone
- (503) 413-7074
- Enumerated
- Jun 7, 2007
- Record last updated
- Jul 19, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (503) 413-6769
- Medicare enrollment
- Enrolled (PECOS I20091021000302); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →
Also registered at 1200 NW 23RD Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Allison Abraham, D.O.Internal Medicine Physician1831488444
- Hannah Bachrach, DOInternal Medicine Physician1518593409
- Aman Bagla, D.O.Internal Medicine Physician1467771188
- Nicolette Bottesini, DOInternal Medicine Physician1114554037
- Kelly CarrierInternal Medicine Physician1144757311
- Brandon DaoStudent in an Organized Health Care Education/Training Program1831848431
Verify Angela Trissandra Marshall-Olson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license DO29017Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% more Medicare Part D claims than the average internal medicine physician in 2024
5,706 Medicare Part D claims for 421 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 234 claims were for opioids.
Most prescribed
- Atorvastatin Calcium320 claims
- Levothyroxine Sodium254 claims
- Losartan Potassium243 claims
- Gabapentin164 claims
- Amlodipine Besylate153 claims
- Lisinopril151 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $17.29
1 payment: food and beverage; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Legacy Clinics LLCPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Angela Trissandra Marshall-Olson among 2,116 internal medicine physician records in Oregon
Angela Trissandra Marshall-Olson, D.O. is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2006 · median 2008 among the 1,232 with a school on file
- Record last updated2010 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
889 internal medicine physician records list a practice address in Portland
They are 889 of the 42,088 NPPES records with a practice address in Portland, and 2,116 internal medicine physician records in Oregon.
All 2,116 in Oregon → Every provider in Portland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Stephen Baugh, MDPortland, OR 972101972577740
- James Borden, MDPortland, OR 972101679555742
- Patrick Dunn, M.D.Portland, OR 972101669447231
- Barry Egener, MDPortland, OR 972101437124088
- Joyce KaynardPortland, OR 972101720053317
- Curtis Marr, M.D.Portland, OR 972101669447264
- Erich Meihoff, MDPortland, OR 972101144295916
- John Oppenheimer, MDPortland, OR 972101922071513
Common questions
What is Angela Trissandra Marshall-Olson, D.O.'s NPI number?
Angela Trissandra Marshall-Olson, D.O.'s National Provider Identifier (NPI) is 1841493988, issued on Jun 7, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Angela Trissandra Marshall-Olson, D.O. located?
The NPPES record lists a practice address at 1200 NW 23RD Ave, Portland, OR, 97210. Phone: (503) 413-7074. Providers update this record themselves, so call before visiting.
How can I verify Angela Trissandra Marshall-Olson, D.O.'s license?
NPPES lists Oregon license number DO29017, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Angela Trissandra Marshall-Olson, D.O. prescribe under Medicare Part D?
In 2024, Angela Trissandra Marshall-Olson, D.O. had 5,706 Medicare Part D claims for 421 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.