Dr. William Oh, MD

  • Newport Beach, CA
  • Colorectal surgeon
NPI1598100323PAC ID4082960737
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
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Personal email
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Mobile number
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Social profiles

Primary practice

Hoag Clinic - Newport Beach

Urgent Care Center · Newport Beach, California

See all 6 affiliations

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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 and contact details
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
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Mobile number
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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 Beach
    510 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.

See all 6 affiliations for Dr. Oh

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.

EHR by site
SiteEHR vendor and product
Hoag Clinic - Newport BeachAvailable with a free account
+3 more sites and 1 medical groupAvailable 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, WashingtonPrimaryLicense MD61169814 · 2021 to 2026 · taxonomy 208C00000X
  • California license2015 to 2026
  • Indiana licenseLicense 01079645A · 2017 to 2019

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.

187colorectal surgeons in California
5colorectal surgeons in Newport Beach

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.

Medicare services, 2024146
Medicare patients111
Paid by Medicare$15,228
Procedure codes6

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.

See all procedures by Dr. Oh

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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.

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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.

Medicare patients, 2024111
Average age76
Average risk score1.52

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

  1. High blood pressure75%
  2. High cholesterol75%
  3. Arthritis44%
  4. Cancer40%
  5. Anxiety36%
  6. Ischemic heart disease33%
  7. Mood disorders29%
  8. 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.

Part D claims, 2024111
Drugs named by CMS4
Total drug cost$372
Part D patients45

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.

See all prescribing by Dr. Oh

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.

Papers5

Topics Dr. Oh writes about most

  • Prostatic Neoplasms

Dr. Oh's most frequent co-authors

Recent publications by Dr. Oh

See all 5 publications and co-authors

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.

How network discovery works

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

$13Kin total
  • 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.

See all payments to Dr. Oh

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.

  1. Medical schoolNew York Medical College
  2. Board certified in colon & rectal surgeryAmerican Board of Colon and Rectal Surgery
  3. Board certified in surgeryAmerican Board of 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

  1. Medicare7
  2. PPO6
  3. HMO3
  4. POS3
  5. EPO2

Source: Dmand AI Insurance Network Data

Sources for Dr. William Oh's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors 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-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand 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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