Dr. Ari Katerelos, MD

  • Honolulu, HI
  • Radiation oncologist
NPI1861607418PAC ID2365636099
Medicare services, 2024
3,243
Medicare patients, 2024
250
Part D claims, 2019
13
Publications
2
MIPS score, 2024
79
Practice address
459 Patterson Rd, Honolulu, HI 96819
Practice phone
Call (671) 646-6956
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Fhp Health Center

Honolulu, Hawaii

See all 7 affiliations

Find Dr. Katerelos' 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.

View contacts for free

Dr. Ari Katerelos is a radiation oncologist in Honolulu, Hawaii

Dr. Katerelos practices at Fhp Health Center in Honolulu, Hawaii.

Dr. Katerelos' NPI, 1861607418, was assigned on May 14, 2007. Dr. Katerelos graduated from David Geffen School of Medicine at UCLA in 2005. Dr. Katerelos holds California license A99003.

NPI and contact details
Medicare PAC ID
2365636099
NPI enumeration date
May 14, 2007
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(671) 646-6956
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
47
Medical school graduation
2005

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Ari Katerelos practices at Fhp Health Center in Honolulu, Hawaii

Dr. Katerelos' primary practice is Fhp Health Center, at 459 Patterson Rd, Honolulu, HI 96819 in Honolulu County. The practice phone is (671) 646-6956.

  • Fhp Health Center
    459 Patterson Rd, Honolulu, HI 96819 · Honolulu CountyPhone(671) 646-6956

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Ari Katerelos is affiliated with 4 sites of care and 3 medical groups

Dr. Katerelos' primary practice is Fhp Health Center in Honolulu, Hawaii. The medical group on file is City of Hope. Dmand AI also links Dr. Katerelos to 2 more group practices and clinics, 2 medical groups and 1 physician office, each named with a free account.

See all 7 affiliations for Dr. Katerelos

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Ari Katerelos' practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Katerelos practices, 3 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Fhp Health CenterAvailable with a free account
+3 more sites and 2 medical groupsAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

See the EHR and IT leaders at every site where Dr. Katerelos practices

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. Ari Katerelos is one of 25 radiation oncologists in Hawaii

Radiation oncology is Dr. Katerelos' primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dr. Katerelos is board certified in radiation oncology by the American Board of Radiology. Dmand AI has Dr. Katerelos' licenses on file in 3 states: California, Guam and Georgia.

Specialties and state licenses

  • Radiation oncology, CaliforniaPrimaryLicense A99003 · 2007 to 2026 · taxonomy 2085R0001X
  • Guam licenseLicense M-1914 · Since 2025
  • Georgia license2025 to 2026

Clinical focus

Dmand AI lists breast cancer radiation, colorectal cancer radiation, lung cancer radiation, pancreatic cancer radiation and prostate cancer radiation among the conditions Dr. Katerelos treats.

Radiation oncologists near Dr. Katerelos

Counts of radiation oncologists 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. Ari Katerelos billed Medicare for 3,243 services in 2024

CMS data shows 3,243 Medicare services from Dr. Katerelos across 14 procedure codes in 2024, for 250 Medicare patients. Medicare paid $1,215,649 for them.

Medicare services, 20243,243
Medicare patients250
Paid by Medicare$1.2M
Procedure codes14

Dr. Katerelos' Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Imaging
2023: 3,6232024: 2,39134%
Other services
2023: 1,0442024: 85218%

Where Dr. Katerelos' Medicare services took place, 2024

  • In an office2,81787%
  • In a facility42613%

Dr. Katerelos compared with the Hawaii median for radiation oncologists, 2024

  • Dr. Katerelos
  • Hawaii median
Medicare services
3,243vs 1,1432.8 times
Medicare patients
250vs 13487% above
Part D claims
13vs 3057% below

Medians across 26 radiation oncologists in Hawaii with Dmand AI profiles that report each measure.

Dr. Katerelos' 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. Katerelos

Need commercial claims for Dr. Katerelos?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Katerelos and other radiation oncologists in Hawaii.

Book a meeting

Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Ari Katerelos treated 250 Medicare patients in 2024, average age 73

CMS counts 250 Medicare patients who saw Dr. Katerelos in 2024. The largest group is 65 to 74, with 131 patients. 75% of them have cancer, and 66% have high cholesterol. 10% are also on Medicaid. Their average risk score is 1.75, 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. Katerelos' median patient age at 70, with 47% women.

Medicare patients, 2024250
Average age73
Average risk score1.75
Also on Medicaid10%

Dr. Katerelos' Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Dr. Katerelos' Medicare patients by sex, 2024

  • Women6626%
  • Men18474%

Chronic conditions among Dr. Katerelos' Medicare patients, 2024

  1. Cancer75%
  2. High cholesterol66%
  3. High blood pressure63%
  4. Arthritis34%
  5. Diabetes29%
  6. Ischemic heart disease25%
  7. Chronic kidney disease22%
  8. Mood disorders18%

Share of Medicare patients with each condition. A patient can have several.

Dr. Katerelos' patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 70

Patient panel by sex, all payers

  • Women47%
  • Men52%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Ari Katerelos wrote 13 Medicare Part D claims in 2019

In 2019, Dr. Katerelos wrote 13 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $466 in total drug cost. In 2018, CMS named 13 claims across 1 drug.

Part D claims, 201913
Drugs named by CMS1
Total drug cost$466

Dr. Katerelos' most prescribed drugs by claims, 2019

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Part D claims for drugs CMS names, 2018 to 2019

  • 2018
  • 2019
Claims for drugs CMS names
2018: 132019: 13No change

Drugs named by CMS: 1 in 2019, 1 in 2018.

See all prescribing by Dr. Katerelos

Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026

Dr. Ari Katerelos scored 79 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for Dr. Katerelos for performance year 2024, reported as part of a group. Dr. Katerelos accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Katerelos' MIPS scores, performance year 2024

  • 79of 100Final score
  • 78.8of 100Quality
  • 40of 100Improvement Activities
  • 62of 100Cost

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

For MedTech and pharma teams

Find radiation oncologists like Dr. Katerelos by procedure volume and prescribing

Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.

Dr. Ari Katerelos has 2 publications on record

Dmand AI links 2 papers to Dr. Katerelos in 2013. Dr. Katerelos' most frequent co-authors are David Alan Bush, MD, Gregory Cheek, MD and Jerry D. Slater, MD.

Papers2

Dr. Katerelos' most frequent co-authors

Recent publications by Dr. Katerelos

See all 2 publications and co-authors

See who Dr. Katerelos researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Katerelos works with, so you can find a warm path to the right radiation oncologists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Ari Katerelos received $997 in industry payments from 2017 to 2024

CMS Open Payments shows 25 general payments to Dr. Katerelos from 13 drug and device companies from 2017 to 2024. Consulting fees make up the largest share, 53% of the total. AstraZeneca Pharmaceuticals LP paid the most, $566.

General payments to Dr. Katerelos by program year, 2017 to 2024

General payments to Dr. Katerelos by kind, 2017 to 2024

$997in total
  • Consulting fees$52553%
  • Food and beverage$46046%
  • Education$121%

Companies that paid Dr. Katerelos the most, 2017 to 2024

Share is of all general payments to this clinician.

See all payments to Dr. Katerelos

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Ari Katerelos graduated from David Geffen School of Medicine at UCLA

Dr. Katerelos graduated from David Geffen School of Medicine at UCLA in 2005.

  1. Medical schoolDavid Geffen School of Medicine at UCLA
  2. Board certified in radiation oncologyAmerican Board of Radiology

Source: Dmand AI Professional Profile Data

Dr. Ari Katerelos accepts plans from 14 insurance carriers

Dr. Katerelos is in network with 14 carriers, including Elevance, United Healthcare 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
  • United Healthcare
  • Blue Cross Blue Shield of Michigan
  • HCSC
  • Blue Cross Blue Shield of Massachusetts
  • Molina
  • Regence Health Plans
  • Aetna
  • +6 more carriersWith a free account

Plan types Dr. Katerelos accepts, by number of carriers

  1. Medicare8
  2. PPO8
  3. HMO7
  4. EPO3
  5. POS1

Source: Dmand AI Insurance Network Data

Sources for Dr. Ari Katerelos'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 phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (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. Ari Katerelos

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. Ari Katerelos' NPI number?

Dr. Ari Katerelos' NPI number is 1861607418. It was assigned on May 14, 2007, and it is active in the NPI Registry.

What kind of doctor is Dr. Ari Katerelos?

Dr. Ari Katerelos is a radiation oncologist in Honolulu, Hawaii. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).

Where does Dr. Ari Katerelos practice?

Dr. Katerelos practices at 459 Patterson Rd, Honolulu, HI 96819. Dr. Katerelos' primary practice is Fhp Health Center in Honolulu, Hawaii. Dmand AI also links Dr. Katerelos to 2 group practices and clinics, 2 medical groups and 1 physician office.

What is Dr. Ari Katerelos' office phone number?

The practice phone on file for Dr. Katerelos is (671) 646-6956.

What is Dr. Ari Katerelos' medical license number?

Dr. Katerelos holds California license A99003, one of the licenses on file in 3 states.

Which states has Dr. Ari Katerelos been licensed in?

Dmand AI has state licenses on file for Dr. Katerelos in California (2007 to 2026), Guam (since 2025) and Georgia (2025 to 2026).

What medical group is Dr. Ari Katerelos part of?

Dr. Katerelos is linked to City of Hope. Dmand AI links Dr. Katerelos to 2 more medical groups.

Does Dr. Ari Katerelos accept Medicare?

Yes. CMS data shows Dr. Katerelos billed Medicare for 3,243 services in 2024, and Dr. Katerelos accepts Medicare assignment.

What is Dr. Ari Katerelos' MIPS score?

Dr. Katerelos' MIPS final score for performance year 2024 is 79 out of 100, reported as part of a group.

How many Medicare patients does Dr. Ari Katerelos see?

CMS counts 250 Medicare patients who saw Dr. Katerelos in 2024, with an average age of 73.

Show 9 more questionsShow fewer questions

Is Dr. Ari Katerelos board certified?

Yes. Dr. Katerelos is board certified in radiation oncology by the American Board of Radiology.

What services does Dr. Ari Katerelos bill to Medicare?

In 2024, Dr. Katerelos' most billed Medicare services were radiation oncology (77014), radiation oncology (77525) and medical supplies or transport (A9579).

Where did Dr. Ari Katerelos go to medical school?

Dr. Katerelos graduated from David Geffen School of Medicine at UCLA in 2005.

What drugs does Dr. Ari Katerelos prescribe most?

In 2019 Medicare Part D data, Dr. Katerelos' most prescribed drugs by claims were Tamsulosin HCl.

Has Dr. Ari Katerelos received payments from drug or device companies?

CMS Open Payments shows $997 in general payments to Dr. Katerelos from 13 companies from 2017 to 2024. The largest total came from AstraZeneca Pharmaceuticals LP.

How long has Dr. Ari Katerelos been practicing?

Dr. Katerelos graduated from medical school in 2005, 21 years ago.

Does Dr. Ari Katerelos do research?

Dmand AI links 2 publications to Dr. Katerelos.

Who does Dr. Ari Katerelos publish with?

Dr. Katerelos' most frequent co-authors are David Alan Bush, MD (2 shared papers), Gregory Cheek, MD (2 shared papers) and Jerry D. Slater, MD (2 shared papers).

What insurance does Dr. Ari Katerelos accept?

Dr. Katerelos is in network with 14 carriers, including Elevance, United Healthcare and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 8. Check the plan with the practice before a visit.

Selling to radiation oncology practices?

See radiation oncologists in Hawaii 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

Cookie settings

Turn each category on or off. Your choice is kept for 12 months and you can change it here at any time.

Necessary

Always on. Sign-in, security, downloads you asked for, your cookie choice, and the page that led to a signup.

View cookies (6)
  • dm_consentDmand AI. Your cookie choices and whether your browser sent a Global Privacy Control signal. 12 months.
  • dm_ft, dm_ltDmand AI. The first and the latest page you arrived on, with the date, so a signup is credited to the page that worked. 90 days, 30 days.
  • dm_fs, dm_lsDmand AI. The first and the latest source of a visit (a search engine, a campaign or the site that linked here). 90 days, 30 days.
  • dm_dl, dm_dl_okDmand AI. After you give an email address for a download, lets you download files without being asked again. 30 days.
  • Session and CSRF cookiesDmand AI (app.dmand.ai). Sign-in and form protection in the application. Session.
  • __cf_bm, cf_clearanceCloudflare. Tells people from automated traffic and keeps the site available. 30 minutes; cf_clearance while a security check is valid.

Analytics

On unless you turn it off. How pages are used, in aggregate, and recordings of how pages are used.

View cookies (6)
  • Google Tag ManagerGoogle. Loads the analytics and marketing tags that are on. Sets no cookie of its own and does not load when both categories are off. n/a.
  • _ga, _ga_<container-id>Google Analytics 4. Visits and page views in aggregate on dmand.ai. 2 years.
  • _clck, _clskMicrosoft Clarity. Recordings and heatmaps of how pages are used, with form fields masked. 1 year, 1 day.
  • CLID, MUID, ANONCHK, MR, SMMicrosoft (clarity.ms). Set by Microsoft when Clarity loads, to recognize a browser across sites that use Clarity. Up to 1 year.
  • None (cookieless)Ahrefs Analytics. Page views in aggregate. n/a.
  • ph_<project>_posthogPostHog. Product usage, errors and performance in app.dmand.ai, used to fix bugs and improve features. 365 days.

Marketing

On unless you turn it off, and always off when your browser sends a Global Privacy Control signal. A visitor identification service tells our sales team which companies and people visit.

View cookies (6)
  • _reb2buid, _reb2butkRB2B. Recognizes a returning browser for visitor identification. 360 days, 1 year.
  • _reb2bgeoRB2B. The location used to decide whether a visit can be identified. 20 days.
  • _reb2brefRB2B. The page or site that referred the visit. 15 days.
  • _reb2bfxf, _reb2btd, _reb2bliRB2B. Links the visit to an identified business profile. 1 month.
  • _reb2bresolveRB2B. Holds a match while it is being resolved. 2 days.
  • _reb2sessionID, _reb2bloadedRB2B. The current visit, and a guard against loading the script twice. 30 minutes, 1 second.

Functional

On unless you turn it off. Remembers choices such as a collapsed section.

View cookies (none today)