Dr. William Oh, MD
- Medicare services, 2024
- 146
- Medicare patients, 2024
- 111
- Part D claims, 2024
- 111
- Publications
- 5
- Hospital affiliations
- 1
- Practice address
- 510 Superior Ave, Newport Beach, CA 92663
- Practice phone
- Call (949) 764-5700
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Hoag Clinic - Newport Beach
Urgent Care Center · Newport Beach, California
Find Dr. Oh'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. William Oh is a colorectal surgeon in Newport Beach, California
Dr. Oh practices at Hoag Clinic - Newport Beach in Newport Beach, California.
Dr. Oh's NPI, 1598100323, was assigned on May 7, 2013. Dr. Oh graduated from New York Medical College in 2013. Dr. Oh holds Washington license MD61169814.
- NPI
- 1598100323NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4082960737
- NPI enumeration date
- May 7, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 764-5700
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Oh practices at Hoag Clinic - Newport Beach in Newport Beach, California
Dr. Oh's primary practice is Hoag Clinic - Newport Beach, at 510 Superior Ave, Newport Beach, CA 92663. The practice phone is (949) 764-5700.
- Hoag Clinic - Newport Beach510 Superior Ave, Newport Beach, CA 92663Phone(949) 764-5700
Source: Dmand AI Affiliation Data
Dr. William Oh is affiliated with 4 sites of care and 2 medical groups
Dr. Oh's primary practice is Hoag Clinic - Newport Beach in Newport Beach, California. Dr. Oh is also affiliated with Hoag Hospital Newport Beach. The medical group on file is Hoag Clinic. Dmand AI also links Dr. Oh to 1 more group practice or clinic, 1 home health agency and 1 medical group, each named with a free account. Dr. Oh's employer is on file too: an urgent care center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Oh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Oh practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hoag Clinic - Newport Beach | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Oh is one of 187 colorectal surgeons in California
Colon and rectal surgery is Dr. Oh's primary specialty in the NPI Registry, under taxonomy code 208C00000X. Dr. Oh is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery. Dmand AI has Dr. Oh's licenses on file in 3 states: Washington, California and Indiana.
Specialties and state licenses
- Colon and rectal surgery, WashingtonPrimary
- California license
- Indiana license
Clinical focus
Dmand AI lists bladder removal, colonoscopy, colon removal, hemorrhoids and intestinal or bowel obstruction among the conditions Dr. Oh treats.
Colorectal surgeons near Dr. Oh
Counts of colorectal 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. William Oh billed Medicare for 146 services in 2024
CMS data shows 146 Medicare services from Dr. Oh across 6 procedure codes in 2024, for 111 Medicare patients. Medicare paid $15,228 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Oh's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 662024: 132100%
- Surgery
- 2023: 182024: 1422%
Dr. Oh compared with the California median for colorectal surgeons, 2024
- Dr. Oh
- California median
- Medicare services
- 146vs 27046% below
- Medicare patients
- 111vs 15528% below
- Part D claims
- 60vs 7115% below
Medians across 175 colorectal surgeons in California with Dmand AI profiles that report each measure.
Dr. Oh'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. Oh and other colorectal surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Oh treated 111 Medicare patients in 2024, average age 76
CMS counts 111 Medicare patients who saw Dr. Oh in 2024. The largest group is 65 to 74, with 55 patients. 75% of them have high blood pressure, and 75% have high cholesterol. Their average risk score is 1.52, 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. Oh's median patient age at 64, with 56% women.
Dr. Oh's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Oh's Medicare patients by sex, 2024
- Women6760%
- Men4440%
Chronic conditions among Dr. Oh's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis44%
- Cancer40%
- Anxiety36%
- Ischemic heart disease33%
- Mood disorders29%
- Depression27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Oh's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women56%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Oh wrote 111 Medicare Part D claims in 2024
In 2024, Dr. Oh wrote 111 Medicare Part D claims for 45 patients. 92% of them were for generic drugs. CMS names the drug for 60 of them, across 4 drugs with 11 or more claims each, at $372 in total drug cost. In 2023, CMS named 15 claims across 1 drug.
Dr. Oh's Part D claims by kind of drug, 2024
- Generic102 claims92%
- Brand-name and other9 claims8%
Dr. Oh'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. Oh's Part D claims, 2024
- Opioids26%29 of 111 claims
- Antibiotics43%48 of 111 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: 152024: 60300%
Drugs named by CMS: 4 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. William Oh ranks in the 49th percentile for colonoscopy in Medicare
Dr. Oh accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 22 procedures of colonoscopy by Dr. Oh, more than 49% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Oh ranks in Medicare procedure volume
- Colonoscopy
- 49th percentile22 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William Oh has 5 publications on record
Dmand AI links 5 papers to Dr. Oh in 2016. The most frequent topics are Prostatic Neoplasms. Dr. Oh has published most often in J Urol. Dr. Oh's most frequent co-authors are William K. Oh, MD, Peter R. Carroll, MD and Philip W. Kantoff, MD.
Topics Dr. Oh writes about most
- Prostatic Neoplasms
Dr. Oh's most frequent co-authors
- William K. Oh, MD3 shared papers
- Peter R. Carroll, MD2 shared papers
- Philip W. Kantoff, MD2 shared papers
Recent publications by Dr. Oh
J Dev Behav Pediatr
See who Dr. Oh researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Oh works with, so you can find a warm path to the right colorectal surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. William Oh received $13,030 in industry payments from 2019 to 2025
CMS Open Payments shows 31 general payments to Dr. Oh from 11 drug and device companies from 2019 to 2025. Education make up the largest share, 84% of the total. Intuitive Surgical, Inc. paid the most, $11,819.
General payments to Dr. Oh by program year, 2019 to 2025
General payments to Dr. Oh by kind, 2019 to 2025
- Education$11,00084%
- Food and beverage$1,26110%
- Travel and lodging$7706%
Companies that paid Dr. Oh the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Oh graduated from New York Medical College
Dr. Oh graduated from New York Medical College in 2013.
- Medical school
- Board certified in colon & rectal surgery
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. William Oh accepts plans from 7 insurance carriers
Dr. Oh is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
Plan types Dr. Oh accepts, by number of carriers
- Medicare7
- PPO6
- HMO3
- POS3
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. William Oh'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) |
| 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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. William Oh
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. William Oh's NPI number?
Dr. William Oh's NPI number is 1598100323. It was assigned on May 7, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. William Oh?
Dr. William Oh is a colorectal surgeon in Newport Beach, California. The primary specialty in the NPI Registry is Colon & Rectal Surgery Physician (taxonomy code 208C00000X).
Where does Dr. William Oh practice?
Dr. Oh practices at 510 Superior Ave, Newport Beach, CA 92663. Dr. Oh's primary practice is Hoag Clinic - Newport Beach in Newport Beach, California. Dmand AI also links Dr. Oh to 1 group practice or clinic, 1 home health agency and 1 medical group.
What is Dr. William Oh's office phone number?
The practice phone on file for Dr. Oh is (949) 764-5700.
What is Dr. William Oh's medical license number?
Dr. Oh holds Washington license MD61169814, one of the licenses on file in 3 states.
Which states has Dr. William Oh been licensed in?
Dmand AI has state licenses on file for Dr. Oh in Washington (2021 to 2026), California (2015 to 2026) and Indiana (2017 to 2019).
Which hospitals is Dr. William Oh affiliated with?
Dr. Oh is affiliated with Hoag Hospital Newport Beach.
What medical group is Dr. William Oh part of?
Dr. Oh is linked to Hoag Clinic. Dmand AI links Dr. Oh to 1 more medical group.
Does Dr. William Oh accept Medicare?
Yes. CMS data shows Dr. Oh billed Medicare for 146 services in 2024, and Dr. Oh accepts Medicare assignment.
How many Medicare patients does Dr. William Oh see?
CMS counts 111 Medicare patients who saw Dr. Oh in 2024, with an average age of 76.
Show 9 more questionsShow fewer questions
Is Dr. William Oh board certified?
Yes. Dr. Oh is board certified in colon & rectal surgery by the American Board of Colon and Rectal Surgery.
What services does Dr. William Oh bill to Medicare?
In 2024, Dr. Oh's most billed Medicare services were office visit, new patient (99205), hospital inpatient care (99232) and hospital inpatient care (99223).
Where did Dr. William Oh go to medical school?
Dr. Oh graduated from New York Medical College in 2013.
What drugs does Dr. William Oh prescribe most?
In 2024 Medicare Part D data, Dr. Oh's most prescribed drugs by claims were Oxycodone HCl, Metronidazole and Amoxicillin-Clavulanate Potass.
Has Dr. William Oh received payments from drug or device companies?
CMS Open Payments shows $13,030 in general payments to Dr. Oh from 11 companies from 2019 to 2025. The largest total came from Intuitive Surgical, Inc.
How long has Dr. William Oh been practicing?
Dr. Oh graduated from medical school in 2013, 13 years ago.
Does Dr. William Oh do research?
Dmand AI links 5 publications to Dr. Oh.
Who does Dr. William Oh publish with?
Dr. Oh's most frequent co-authors are William K. Oh, MD (3 shared papers), Peter R. Carroll, MD (2 shared papers) and Philip W. Kantoff, MD (2 shared papers).
What insurance does Dr. William Oh accept?
Dr. Oh is in network with 7 carriers, including Aetna, Elevance and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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