Dr. John D. Oholleran, MD
- Medicare services, 2024
- 43
- Medicare patients, 2024
- 57
- Part D claims, 2024
- 39
- Hospital affiliations
- 3
- Industry payments
- $10,178
- Practice address
- 9205 SW Barnes Road, Portland, OR 97225
- Practice phone
- Call (503) 216-1234
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Oholleran's 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. John D. Oholleran is a general surgeon in Portland, Oregon
Dr. Oholleran practices at Providence St. Vincent Medical Center in Portland, Oregon, part of Providence Health & Services.
Dr. Oholleran's NPI, 1912007220, was assigned on September 25, 2006. Dr. Oholleran graduated from University of Nebraska College of Medicine in 1987. Dr. Oholleran holds Oregon license MD215189.
- NPI
- 1912007220NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9133285224
- NPI enumeration date
- September 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (503) 216-1234
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John D. Oholleran practices at Providence St. Vincent Medical Center in Portland, Oregon
Dr. Oholleran's primary practice is Providence St. Vincent Medical Center, at 9205 SW Barnes Road, Portland, OR 97225 in Washington County. The practice phone is (503) 216-1234.
- Providence St. Vincent Medical Center9205 SW Barnes Road, Portland, OR 97225 · Washington CountyPhone(503) 216-1234
Source: Dmand AI Affiliation Data
Dr. John D. Oholleran is affiliated with 6 sites of care and 6 medical groups
Dr. Oholleran's primary practice is Providence St. Vincent Medical Center in Portland, Oregon, part of Providence Health & Services. Dr. Oholleran is also affiliated with Providence Willamette Falls Medical Center. The medical group on file is Providence Medical Group, Oregon. Dmand AI also links Dr. Oholleran to 1 more hospital, 5 medical groups and 3 group practices and clinics, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John D. Oholleran's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oholleran practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Providence St. Vincent Medical Center | Available with a free account |
| +5 more sites and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John D. Oholleran is one of 438 general surgeons in Oregon
Surgery is Dr. Oholleran's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dmand AI has Dr. Oholleran's licenses on file in 3 states: Oregon, California and Illinois.
Specialties and state licenses
- Surgery, OregonPrimary
- California license
- Illinois license
General surgeons near Dr. Oholleran
Counts of general surgeons 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. John D. Oholleran billed Medicare for 43 services in 2024
CMS data shows 43 Medicare services from Dr. Oholleran across 2 procedure codes in 2024, for 57 Medicare patients. Medicare paid $3,576 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oholleran's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1052024: 4359%
Dr. Oholleran compared with the Oregon median for general surgeons, 2024
- Dr. Oholleran
- Oregon median
- Medicare services
- 43vs 8348% below
- Medicare patients
- 57vs 8230% below
- Part D claims
- 19vs 4760% below
Medians across 433 general surgeons in Oregon with Dmand AI profiles that report each measure.
Dr. Oholleran'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. Oholleran and other general surgeons in Oregon.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John D. Oholleran treated 57 Medicare patients in 2024, average age 74
CMS counts 57 Medicare patients who saw Dr. Oholleran in 2024. The largest group is 65 to 74, with 26 patients. 75% of them have high blood pressure, and 74% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.60, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Oholleran's median patient age at 65, with 45% women.
Dr. Oholleran's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Oholleran's Medicare patients by sex, 2024
- Women3154%
- Men2646%
Chronic conditions among Dr. Oholleran's Medicare patients, 2024
- High blood pressure75%
- High cholesterol74%
- Arthritis60%
- Mood disorders35%
- Depression33%
- Atrial fibrillation28%
- Chronic kidney disease28%
- Heart failure28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oholleran's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 65
Patient panel by sex, all payers
- Women45%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John D. Oholleran wrote 39 Medicare Part D claims in 2024
In 2024, Dr. Oholleran wrote 39 Medicare Part D claims for 33 patients. 100% of them were for generic drugs. CMS names the drug for 19 of them, across 1 drug with 11 or more claims each, at $109 in total drug cost. In 2023, CMS named 18 claims across 1 drug.
Dr. Oholleran'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. Oholleran's Part D claims, 2024
- Opioids59%23 of 39 claims
- Antibiotics31%12 of 39 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: 182024: 196%
Drugs named by CMS: 1 in 2024, 1 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. John D. Oholleran ranks in the 97th percentile for hernia repair - groin (open) in Medicare
Dr. Oholleran accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 23 procedures of hernia repair - groin (open) by Dr. Oholleran, more than 97% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Oholleran ranks in Medicare procedure volume
- Hernia repair - groin (open)
- 97th percentile23 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Removal of tissue: 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. John D. Oholleran received $10,178 in industry payments from 2016 to 2023
CMS Open Payments shows 43 general payments to Dr. Oholleran from 7 drug and device companies from 2016 to 2023. Travel and lodging make up the largest share, 67% of the total. Intuitive Surgical, Inc. paid the most, $5,309.
General payments to Dr. Oholleran by program year, 2016 to 2023
General payments to Dr. Oholleran by kind, 2016 to 2023
- Travel and lodging$6,85467%
- Food and beverage$2,77527%
- Speaker and faculty fees$5505%
Companies that paid Dr. Oholleran the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John D. Oholleran graduated from University of Nebraska College of Medicine
Dr. Oholleran graduated from University of Nebraska College of Medicine in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John D. Oholleran'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) |
| 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. John D. Oholleran
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. John D. Oholleran's NPI number?
Dr. John D. Oholleran's NPI number is 1912007220. It was assigned on September 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John D. Oholleran?
Dr. John D. Oholleran is a general surgeon in Portland, Oregon. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John D. Oholleran practice?
Dr. Oholleran practices at 9205 SW Barnes Road, Portland, OR 97225. Dr. Oholleran's primary practice is Providence St. Vincent Medical Center in Portland, Oregon, part of Providence Health & Services. Dmand AI also links Dr. Oholleran to 1 hospital, 5 medical groups and 3 group practices and clinics.
What is Dr. John D. Oholleran's office phone number?
The practice phone on file for Dr. Oholleran is (503) 216-1234.
What is Dr. John D. Oholleran's medical license number?
Dr. Oholleran holds Oregon license MD215189, one of the licenses on file in 3 states.
Which states has Dr. John D. Oholleran been licensed in?
Dmand AI has state licenses on file for Dr. Oholleran in Oregon, California and Illinois.
Which hospitals is Dr. John D. Oholleran affiliated with?
Dr. Oholleran practices at Providence St. Vincent Medical Center in Portland, Oregon. Dr. Oholleran is also affiliated with Providence Willamette Falls Medical Center. Dmand AI links Dr. Oholleran to 1 more hospital.
What medical group is Dr. John D. Oholleran part of?
Dr. Oholleran is linked to Providence Medical Group, Oregon. Dmand AI links Dr. Oholleran to 5 more medical groups.
Does Dr. John D. Oholleran accept Medicare?
Yes. CMS data shows Dr. Oholleran billed Medicare for 43 services in 2024, and Dr. Oholleran accepts Medicare assignment.
How many Medicare patients does Dr. John D. Oholleran see?
CMS counts 57 Medicare patients who saw Dr. Oholleran in 2024, with an average age of 74.
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What services does Dr. John D. Oholleran bill to Medicare?
In 2024, Dr. Oholleran's most billed Medicare services were hospital inpatient care (99232) and hospital inpatient care (99223).
Where did Dr. John D. Oholleran go to medical school?
Dr. Oholleran graduated from University of Nebraska College of Medicine in 1987.
What drugs does Dr. John D. Oholleran prescribe most?
In 2024 Medicare Part D data, Dr. Oholleran's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. John D. Oholleran received payments from drug or device companies?
CMS Open Payments shows $10,178 in general payments to Dr. Oholleran from 7 companies from 2016 to 2023. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John D. Oholleran been practicing?
Dr. Oholleran graduated from medical school in 1987, 39 years ago.
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