Dr. Howard I. Keller, MD
- Medicare services, 2022
- 615
- Part D claims, 2024
- 90
- Industry payments
- $13,591
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 30 Aulike St Ste 500 Suite 500, Kailua, HI 96734
- Practice phone
- Call (808) 263-8822
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Castle Physician Network - Kailua (Aulike St)
Multi-specialty group site · Kailua, Hawaii
Find Dr. Keller's professional email, personal email and mobile number
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Dr. Howard I. Keller is an internist in Pearl City, Hawaii
Dr. Keller practices at Castle Physician Network - Kailua (Aulike St) in Kailua, Hawaii.
Dr. Keller's NPI, 1124032594, was assigned on July 28, 2006. Dr. Keller graduated from Georgetown University School of Medicine in 1961. Dr. Keller holds Hawaii license MD1906.
- NPI
- 1124032594NPI Registry (opens in a new tab)
- NPI enumeration date
- July 28, 2006
- NPI status
- Active
- Practice phone
- (808) 263-8822
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 91
- Medical school graduation
- 1961
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Howard I. Keller practices in Kailua and Pearl City
Dr. Keller's primary practice is Castle Physician Network - Kailua (Aulike St), at 30 Aulike St Ste 500 Suite 500, Kailua, HI 96734. The practice phone is (808) 263-8822. The NPI Registry lists Dr. Keller's practice address as 1245 Kuala St, Pearl City, HI 96782.
- Castle Physician Network - Kailua (Aulike St)Primary30 Aulike St Ste 500 Suite 500, Kailua, HI 96734Phone(808) 263-8822
- NPI Registry address1245 Kuala St, Pearl City, HI 96782 · Honolulu CountyPhone(808) 262-6951
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; Doctors and Clinicians National Downloadable File (CMS); and Dmand AI Practice Data
Dr. Howard I. Keller is affiliated with 1 site of care and 1 medical group
Dr. Keller's primary practice is Castle Physician Network - Kailua (Aulike St) in Kailua, Hawaii. The medical group on file is Castle Health Group.
Sources: Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dmand AI tracks the EHR system at Dr. Howard I. Keller's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keller practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Castle Physician Network - Kailua (Aulike St) | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Howard I. Keller is one of 771 internists in Hawaii
Internal medicine is Dr. Keller's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Keller is licensed in Hawaii.
Specialties and state licenses
- Internal medicine, HawaiiPrimary
Internists near Dr. Keller
Counts of internists 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. Howard I. Keller billed Medicare for 615 services in 2022
CMS data shows 615 Medicare services from Dr. Keller across 8 procedure codes in 2022. Medicare paid $43,933 for them. Every service was in an office.
Dr. Keller's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Office and hospital visits
- 2021: 4122022: 4294%
- Other services
- 2021: 12,3712022: 17499%
- Tests and treatments
- 2021: 152022: 1220%
Dr. Keller compared with the Hawaii median for internists, 2022
- Dr. Keller
- Hawaii median
- Medicare services
- 615vs 34280% above
- Part D claims
- 12vs 67098% below
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Keller's most billed Medicare procedure codes, 2022
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. Keller and other internists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Howard I. Keller's patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Keller's median patient age at 67, with 49% women.
Dr. Keller's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women49%
- Men51%
Source: Dmand AI Patient Panel Data
Dr. Howard I. Keller wrote 90 Medicare Part D claims in 2024
In 2024, Dr. Keller wrote 90 Medicare Part D claims for 41 patients. 97% of them were for generic drugs. CMS names the drug for 12 of them, across 1 drug with 11 or more claims each, at $139 in total drug cost. In 2023, CMS named 1,119 claims across 33 drugs.
Dr. Keller's Part D claims by kind of drug, 2024
- Generic87 claims97%
- Brand-name and other3 claims3%
Dr. Keller'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1192024: 1299%
Drugs named by CMS: 1 in 2024, 33 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
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Dr. Howard I. Keller received $13,591 in industry payments from 2016 to 2025
CMS Open Payments shows 412 general payments to Dr. Keller from 30 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 98% of the total. Amarin Pharma Inc. paid the most, $2,681.
General payments to Dr. Keller by program year, 2016 to 2025
General payments to Dr. Keller by kind, 2016 to 2025
- Food and beverage$13,25998%
- Education$3312%
Companies that paid Dr. Keller the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Howard I. Keller graduated from Georgetown University School of Medicine
Dr. Keller graduated from Georgetown University School of Medicine in 1961.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Howard I. Keller'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| 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 Data |
| 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) |
| 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. Howard I. Keller
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. Howard I. Keller's NPI number?
Dr. Howard I. Keller's NPI number is 1124032594. It was assigned on July 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Howard I. Keller?
Dr. Howard I. Keller is an internist in Pearl City, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Howard I. Keller practice?
Dr. Keller practices at 30 Aulike St Ste 500 Suite 500, Kailua, HI 96734. Dr. Keller also practices at 1245 Kuala St, Pearl City, HI 96782. Dr. Keller's primary practice is Castle Physician Network - Kailua (Aulike St) in Kailua, Hawaii.
What is Dr. Howard I. Keller's office phone number?
The practice phone on file for Dr. Keller is (808) 263-8822.
What is Dr. Howard I. Keller's medical license number?
Dr. Keller holds Hawaii license MD1906.
What medical group is Dr. Howard I. Keller part of?
Dr. Keller is linked to Castle Health Group.
Does Dr. Howard I. Keller accept Medicare?
Yes. CMS data shows Dr. Keller billed Medicare for 615 services in 2022.
What services does Dr. Howard I. Keller bill to Medicare?
In 2022, Dr. Keller's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medical service (0003A).
Where did Dr. Howard I. Keller go to medical school?
Dr. Keller graduated from Georgetown University School of Medicine in 1961.
What drugs does Dr. Howard I. Keller prescribe most?
In 2024 Medicare Part D data, Dr. Keller's most prescribed drugs by claims were Lisinopril.
Has Dr. Howard I. Keller received payments from drug or device companies?
CMS Open Payments shows $13,591 in general payments to Dr. Keller from 30 companies from 2016 to 2025. The largest total came from Amarin Pharma Inc.
How long has Dr. Howard I. Keller been practicing?
Dr. Keller graduated from medical school in 1961, 65 years ago.
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