Dr. Douglas A. Shumaker, MD
- Medicare services, 2023
- 288
- Part D claims, 2024
- 78
- Industry payments
- $314
- Medical group
- 1
- State license
- 1
- Practice address
- 9701 SW Barnes Rd, Portland, OR 97225
- Practice phone
- Call (503) 297-8081
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Gastroenterology West at SW Barnes Road
Portland, Oregon
Find Dr. Shumaker's professional email, personal email and mobile number
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Dr. Douglas A. Shumaker is a gastroenterologist in Portland, Oregon
Dr. Shumaker practices at Gastroenterology West at SW Barnes Road in Portland, Oregon.
Dr. Shumaker's NPI, 1225034937, was assigned on June 27, 2005. Dr. Shumaker graduated from Oregon Health Sciences University School of Medicine in 1994. Dr. Shumaker holds Oregon license MD19573.
- NPI
- 1225034937NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5193782126
- NPI enumeration date
- June 27, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (503) 297-8081
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 58
- Medical school graduation
- 1994
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas A. Shumaker practices at Gastroenterology West at SW Barnes Road in Portland, Oregon
Dr. Shumaker's primary practice is Gastroenterology West at SW Barnes Road, at 9701 SW Barnes Rd, Portland, OR 97225 in Washington County. The practice phone is (503) 297-8081.
- Gastroenterology West at SW Barnes Road9701 SW Barnes Rd, Portland, OR 97225 · Washington CountyPhone(503) 297-8081
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Douglas A. Shumaker is affiliated with 1 site of care and 1 medical group
Dr. Shumaker's primary practice is Gastroenterology West at SW Barnes Road in Portland, Oregon. The medical group on file is The Oregon Clinic.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Douglas A. Shumaker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shumaker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Gastroenterology West at SW Barnes Road | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas A. Shumaker is one of 226 gastroenterologists in Oregon
Gastroenterology is Dr. Shumaker's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Shumaker is licensed in Oregon.
Specialties and state licenses
- Gastroenterology, OregonPrimary
Gastroenterologists near Dr. Shumaker
Counts of gastroenterologists 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. Douglas A. Shumaker billed Medicare for 288 services in 2023
CMS data shows 288 Medicare services from Dr. Shumaker across 9 procedure codes in 2023. Medicare paid $28,582 for them.
Dr. Shumaker's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Surgery
- 2022: 1332023: 10620%
- Office and hospital visits
- 2022: 1192023: 8727%
- Lab and pathology
- 2022: 1122023: 7236%
- Other services
- 2022: 182023: 2328%
Where Dr. Shumaker's Medicare services took place, 2023
- In an office15955%
- In a facility12945%
Dr. Shumaker compared with the Oregon median for gastroenterologists, 2023
- Dr. Shumaker
- Oregon median
- Medicare services
- 288vs 2735% above
- Part D claims
- 15vs 34096% below
Medians across 224 gastroenterologists in Oregon with Dmand AI profiles that report each measure.
Dr. Shumaker's most billed Medicare procedure codes, 2023
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. Shumaker and other gastroenterologists in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas A. Shumaker's patients have a median age of 46
Across all payers, Dmand AI patient panel data puts Dr. Shumaker's median patient age at 46, with 52% women.
Dr. Shumaker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 46
Patient panel by sex, all payers
- Women52%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. Douglas A. Shumaker wrote 78 Medicare Part D claims in 2024
In 2024, Dr. Shumaker wrote 78 Medicare Part D claims for 33 patients. 69% of them were for generic drugs. CMS names the drug for 15 of them, across 1 drug with 11 or more claims each, at $453 in total drug cost. In 2023, CMS named 215 claims across 9 drugs.
Dr. Shumaker's Part D claims by kind of drug, 2024
- Generic54 claims69%
- Brand-name24 claims31%
Dr. Shumaker'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2152024: 1593%
Drugs named by CMS: 1 in 2024, 9 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. Douglas A. Shumaker offers telehealth to Medicare patients
Dr. Shumaker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Shumaker as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Douglas A. Shumaker received $314 in industry payments from 2016 to 2019
CMS Open Payments shows 9 general payments to Dr. Shumaker from 4 drug and device companies from 2016 to 2019. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $117.
General payments to Dr. Shumaker by program year, 2016 to 2019
Companies that paid Dr. Shumaker the most, 2016 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas A. Shumaker graduated from Oregon Health Sciences University School of Medicine
Dr. Shumaker graduated from Oregon Health Sciences University School of Medicine in 1994.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Douglas A. Shumaker'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 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 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. Douglas A. Shumaker
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. Douglas A. Shumaker's NPI number?
Dr. Douglas A. Shumaker's NPI number is 1225034937. It was assigned on June 27, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas A. Shumaker?
Dr. Douglas A. Shumaker is a gastroenterologist in Portland, Oregon. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Douglas A. Shumaker practice?
Dr. Shumaker practices at 9701 SW Barnes Rd, Portland, OR 97225. Dr. Shumaker's primary practice is Gastroenterology West at SW Barnes Road in Portland, Oregon.
What is Dr. Douglas A. Shumaker's office phone number?
The practice phone on file for Dr. Shumaker is (503) 297-8081.
What is Dr. Douglas A. Shumaker's medical license number?
Dr. Shumaker holds Oregon license MD19573.
What medical group is Dr. Douglas A. Shumaker part of?
Dr. Shumaker is linked to The Oregon Clinic.
Does Dr. Douglas A. Shumaker accept Medicare?
Yes. CMS data shows Dr. Shumaker billed Medicare for 288 services in 2023, and Dr. Shumaker accepts Medicare assignment.
Does Dr. Douglas A. Shumaker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Shumaker as offering telehealth services.
What services does Dr. Douglas A. Shumaker bill to Medicare?
In 2023, Dr. Shumaker's most billed Medicare services were lab and pathology test (88305), office visit, established patient (99214) and surgery: digestive system (45385).
Where did Dr. Douglas A. Shumaker go to medical school?
Dr. Shumaker graduated from Oregon Health Sciences University School of Medicine in 1994.
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What drugs does Dr. Douglas A. Shumaker prescribe most?
In 2024 Medicare Part D data, Dr. Shumaker's most prescribed drugs by claims were Omeprazole.
Has Dr. Douglas A. Shumaker received payments from drug or device companies?
CMS Open Payments shows $314 in general payments to Dr. Shumaker from 4 companies from 2016 to 2019. The largest total came from Allergan Inc.
How long has Dr. Douglas A. Shumaker been practicing?
Dr. Shumaker graduated from medical school in 1994, 32 years ago.
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