Dr. Dena Bethany Witthaus, DO
- Medicare services, 2017
- 13
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 7,035
- Affiliated sites
- 1
- Medical groups
- 2
- Practice address
- 500 NE Multnomah St, Portland, OR 97232
- Practice phone
- Call (503) 813-2440
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Foundation Health Plan of the Northwest
Portland, Oregon
Find Dr. Witthaus' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Dena Bethany Witthaus is an internist in Portland, Oregon
Dr. Witthaus practices at Kaiser Foundation Health Plan of the Northwest in Portland, Oregon.
Dr. Witthaus' NPI, 1528354966, was assigned on June 23, 2011. Dr. Witthaus graduated from Arizona College of Osteopathic Medicine Mid Western University in 2011. Dr. Witthaus holds Oregon license PG154631.
- NPI
- 1528354966NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254559115
- NPI enumeration date
- June 23, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 813-2440
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Dena Bethany Witthaus practices at Kaiser Foundation Health Plan of the Northwest in Portland, Oregon
Dr. Witthaus' primary practice is Kaiser Foundation Health Plan of the Northwest, at 500 NE Multnomah St, Portland, OR 97232 in Multnomah County. The practice phone is (503) 813-2440.
- Kaiser Foundation Health Plan of the Northwest500 NE Multnomah St, Portland, OR 97232 · Multnomah CountyPhone(503) 813-2440
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Dena Bethany Witthaus is affiliated with 2 sites of care and 2 medical groups
Dr. Witthaus' primary practice is Kaiser Foundation Health Plan of the Northwest in Portland, Oregon. The medical group on file is Kaiser Permanente Northwest. Dmand AI also links Dr. Witthaus to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Dena Bethany Witthaus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Witthaus practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Foundation Health Plan of the Northwest | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Dena Bethany Witthaus is one of 1,680 internists in Oregon
Internal medicine is Dr. Witthaus' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Witthaus is licensed in Oregon.
Specialties and state licenses
- Internal medicine, OregonPrimary
Internists near Dr. Witthaus
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. Dena Bethany Witthaus billed Medicare for 13 services in 2017
CMS data shows 13 Medicare services from Dr. Witthaus across 1 procedure code in 2017, all of them office visits, for 11 Medicare patients. Medicare paid $626 for them. Every service was in an office.
Dr. Witthaus compared with the Oregon median for internists, 2017
- Dr. Witthaus
- Oregon median
- Medicare services
- 13vs 30096% below
- Medicare patients
- 11vs 13292% below
- Part D claims
- 6,313vs 22228.4 times
Medians across 1,791 internists in Oregon with Dmand AI profiles that report each measure.
Dr. Witthaus' most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Witthaus?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Witthaus and other internists in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Dena Bethany Witthaus treated 11 Medicare patients in 2024, average age 67
CMS counts 11 Medicare patients who saw Dr. Witthaus in 2024. The largest group is 75 to 84, with 0 patients. Their average risk score is 0.55, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Witthaus' median patient age at 54, with 64% women.
Dr. Witthaus' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Witthaus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 54
Patient panel by sex, all payers
- Women64%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Dena Bethany Witthaus wrote 7,035 Medicare Part D claims in 2024
In 2024, Dr. Witthaus wrote 7,035 Medicare Part D claims for 1,146 patients. 89% of them were for generic drugs. CMS names the drug for 6,313 of them, across 116 drugs with 11 or more claims each, at $232,459 in total drug cost. In 2023, CMS named 4,070 claims across 85 drugs.
Dr. Witthaus' Part D claims by kind of drug, 2024
- Generic6,257 claims89%
- Brand-name688 claims10%
- Other90 claims1%
Dr. Witthaus' 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. Witthaus' Part D claims, 2024
- Opioids10%672 of 7,035 claims
- Antibiotics4%249 of 7,035 claims
- Antipsychotics, patients 65 and over0%14 of 7,035 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: 4,0702024: 6,31355%
Drugs named by CMS: 116 in 2024, 85 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
How Dr. Dena Bethany Witthaus takes part in Medicare
Dr. Witthaus accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Dena Bethany Witthaus graduated from Arizona College of Osteopathic Medicine Mid Western University
Dr. Witthaus graduated from Arizona College of Osteopathic Medicine Mid Western University in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Dena Bethany Witthaus'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 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) |
| 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. Dena Bethany Witthaus
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. Dena Bethany Witthaus' NPI number?
Dr. Dena Bethany Witthaus' NPI number is 1528354966. It was assigned on June 23, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Dena Bethany Witthaus?
Dr. Dena Bethany Witthaus is an internist in Portland, Oregon. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Dena Bethany Witthaus practice?
Dr. Witthaus practices at 500 NE Multnomah St, Portland, OR 97232. Dr. Witthaus' primary practice is Kaiser Foundation Health Plan of the Northwest in Portland, Oregon. Dmand AI also links Dr. Witthaus to 1 group practice or clinic and 1 medical group.
What is Dr. Dena Bethany Witthaus' office phone number?
The practice phone on file for Dr. Witthaus is (503) 813-2440.
What is Dr. Dena Bethany Witthaus' medical license number?
Dr. Witthaus holds Oregon license PG154631.
What medical group is Dr. Dena Bethany Witthaus part of?
Dr. Witthaus is linked to Kaiser Permanente Northwest. Dmand AI links Dr. Witthaus to 1 more medical group.
Does Dr. Dena Bethany Witthaus accept Medicare?
Yes. CMS data shows Dr. Witthaus billed Medicare for 13 services in 2017, and Dr. Witthaus accepts Medicare assignment.
How many Medicare patients does Dr. Dena Bethany Witthaus see?
CMS counts 11 Medicare patients who saw Dr. Witthaus in 2024, with an average age of 67.
What services does Dr. Dena Bethany Witthaus bill to Medicare?
In 2017, Dr. Witthaus' most billed Medicare services were office visit, established patient (99214).
Where did Dr. Dena Bethany Witthaus go to medical school?
Dr. Witthaus graduated from Arizona College of Osteopathic Medicine Mid Western University in 2011.
What drugs does Dr. Dena Bethany Witthaus prescribe most?
In 2024 Medicare Part D data, Dr. Witthaus' most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Hydrocodone-Acetaminophen.
How long has Dr. Dena Bethany Witthaus been practicing?
Dr. Witthaus graduated from medical school in 2011, 15 years ago.
Selling to internal medicine practices?
See internists in Oregon by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card