Crit Care Med
Dr. Ronald C. Holness, MD
- Medicare services, 2024
- 2,956
- Medicare patients, 2024
- 213
- Part D claims, 2024
- 35
- Publications
- 2
- Hospital affiliations
- 4
- Practice address
- 101 City Drive South, Orange, CA 92868
- Practice phone
- Call (714) 456-7890
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Holness' 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. Ronald C. Holness is a general surgeon in Orange, California
Dr. Holness practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. Holness' NPI, 1114938867, was assigned on August 10, 2006. Dr. Holness graduated from David Geffen School of Medicine at UCLA in 1983. Dr. Holness holds California license G55605.
- NPI
- 1114938867NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0648169698
- NPI enumeration date
- August 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (714) 456-7890
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronald C. Holness practices at UCI Health - Orange in Orange, California
Dr. Holness' primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.
- UCI Health - Orange101 City Drive South, Orange, CA 92868 · Orange CountyPhone(714) 456-7890
Source: Dmand AI Affiliation Data
Dr. Ronald C. Holness is affiliated with 6 sites of care
Dr. Holness' primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dr. Holness is also affiliated with Long Beach Medical Center. Dmand AI also links Dr. Holness to 2 more hospitals, 1 physician office and 1 home health agency, 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. Ronald C. Holness' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Holness practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCI Health - Orange | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronald C. Holness is one of 2,926 general surgeons in California
Surgery is Dr. Holness' primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Holness is board certified in surgery by the American Board of Surgery. Dr. Holness is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
Clinical focus
Dmand AI lists cancerous skin growth removal, gallbladder removal, gastrointestinal bleeding and groin hernia surgery among the conditions Dr. Holness treats.
General surgeons near Dr. Holness
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. Ronald C. Holness billed Medicare for 2,956 services in 2024
CMS data shows 2,956 Medicare services from Dr. Holness across 5 procedure codes in 2024, for 213 Medicare patients. Medicare paid $198,072 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Holness' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 2,5122024: 2,95618%
- Surgery
- 2023: 702024: 0100%
Dr. Holness compared with the California median for general surgeons, 2024
- Dr. Holness
- California median
- Medicare services
- 2,956vs 16617.8 times
- Medicare patients
- 213vs 12176% above
- Part D claims
- 73vs 342.1 times
Medians across 2,606 general surgeons in California with Dmand AI profiles that report each measure.
Dr. Holness' 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.
Need commercial claims for Dr. Holness?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Holness and other general surgeons in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronald C. Holness treated 213 Medicare patients in 2024, average age 74
CMS counts 213 Medicare patients who saw Dr. Holness in 2024. The largest group is 65 to 74, with 83 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 56% are also on Medicaid. Their average risk score is 4.83, 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. Holness' median patient age at 75, with 48% women.
Dr. Holness' Medicare patients by age, 2024
Dr. Holness' Medicare patients by sex, 2024
- Women11454%
- Men9946%
Chronic conditions among Dr. Holness' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes71%
- Chronic kidney disease65%
- Heart failure60%
- Arthritis59%
- Ischemic heart disease59%
- Mood disorders49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Holness' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Ronald C. Holness wrote 35 Medicare Part D claims in 2024
In 2024, Dr. Holness wrote 35 Medicare Part D claims for 24 patients. 94% of them were for generic drugs. They cover 3 drugs, with $383 in total drug cost. In 2022, CMS named 83 claims across 3 drugs.
Dr. Holness' Part D claims by kind of drug, 2024
- Generic33 claims94%
- Brand-name and other2 claims6%
Dr. Holness' most prescribed drugs by claims, 2023
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. Holness' Part D claims, 2024
- Antibiotics49%17 of 35 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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 832023: 7312%
Drugs named by CMS: 3 in 2023, 3 in 2022.
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. Ronald C. Holness ranks in the 84th percentile for removal of tissue in Medicare
Dr. Holness accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 88 procedures of removal of tissue by Dr. Holness, more than 84% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Holness ranks in Medicare procedure volume
- Removal of tissue
- 84th percentile88 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. Ronald C. Holness has 2 publications on record
Dmand AI links 2 papers to Dr. Holness. Dr. Holness' most frequent co-authors are Kenneth Waxman, MD and Gail T. Tominaga, MD.
Dr. Holness' most frequent co-authors
- Kenneth Waxman, MD2 shared papers
- Gail T. Tominaga, MD1 shared paper
Recent publications by Dr. Holness
Ann Surg
See who Dr. Holness researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Holness works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Ronald C. Holness received $2,065 in industry payments from 2016 to 2024
CMS Open Payments shows 50 general payments to Dr. Holness from 15 drug and device companies from 2016 to 2024. Food and beverage make up the largest share, 94% of the total. Organogenesis Inc. paid the most, $987.
General payments to Dr. Holness by program year, 2016 to 2024
General payments to Dr. Holness by kind, 2016 to 2024
- Food and beverage$1,94594%
- Speaker and faculty fees$1025%
- Education$171%
Companies that paid Dr. Holness the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ronald C. Holness has 1 award and honors on record
Dmand AI lists 1 award for Dr. Holness.
Awards and honors for Dr. Holness
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. Ronald C. Holness graduated from David Geffen School of Medicine at UCLA
Dr. Holness graduated from David Geffen School of Medicine at UCLA in 1983.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. Ronald C. Holness accepts plans from 9 insurance carriers
Dr. Holness is in network with 9 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Humana
- +1 more carriersWith a free account
Plan types Dr. Holness accepts, by number of carriers
- Medicare8
- PPO6
- HMO4
- POS3
- EPO2
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ronald C. Holness'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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Ronald C. Holness
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. Ronald C. Holness' NPI number?
Dr. Ronald C. Holness' NPI number is 1114938867. It was assigned on August 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronald C. Holness?
Dr. Ronald C. Holness is a general surgeon in Orange, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. Ronald C. Holness practice?
Dr. Holness practices at 101 City Drive South, Orange, CA 92868. Dr. Holness' primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. Holness to 2 hospitals, 1 physician office and 1 home health agency.
What is Dr. Ronald C. Holness' office phone number?
The practice phone on file for Dr. Holness is (714) 456-7890.
What is Dr. Ronald C. Holness' medical license number?
Dr. Holness holds California license G55605.
Which hospitals is Dr. Ronald C. Holness affiliated with?
Dr. Holness practices at UCI Health - Orange in Orange, California. Dr. Holness is also affiliated with Long Beach Medical Center. Dmand AI links Dr. Holness to 2 more hospitals.
Does Dr. Ronald C. Holness accept Medicare?
Yes. CMS data shows Dr. Holness billed Medicare for 2,956 services in 2024, and Dr. Holness accepts Medicare assignment.
How many Medicare patients does Dr. Ronald C. Holness see?
CMS counts 213 Medicare patients who saw Dr. Holness in 2024, with an average age of 74.
Is Dr. Ronald C. Holness board certified?
Yes. Dr. Holness is board certified in surgery by the American Board of Surgery.
What services does Dr. Ronald C. Holness bill to Medicare?
In 2024, Dr. Holness' most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99213) and hospital inpatient care (99223).
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Where did Dr. Ronald C. Holness go to medical school?
Dr. Holness graduated from David Geffen School of Medicine at UCLA in 1983.
What drugs does Dr. Ronald C. Holness prescribe most?
In 2023 Medicare Part D data, Dr. Holness' most prescribed drugs by claims were Hydrocodone-Acetaminophen, Mupirocin and Oxycodone-Acetaminophen.
Has Dr. Ronald C. Holness received payments from drug or device companies?
CMS Open Payments shows $2,065 in general payments to Dr. Holness from 15 companies from 2016 to 2024. The largest total came from Organogenesis Inc.
How long has Dr. Ronald C. Holness been practicing?
Dr. Holness graduated from medical school in 1983, 43 years ago.
Does Dr. Ronald C. Holness do research?
Dmand AI links 2 publications to Dr. Holness.
Who does Dr. Ronald C. Holness publish with?
Dr. Holness' most frequent co-authors are Kenneth Waxman, MD (2 shared papers) and Gail T. Tominaga, MD (1 shared paper).
What insurance does Dr. Ronald C. Holness accept?
Dr. Holness is in network with 9 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.
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