Henry Michael Keiser, AGNP-C
- Medicare patients, 2024
- 14
- Part D claims, 2024
- 1,098
- Hospital affiliations
- 2
- Industry payments
- $29
- Medical groups
- 2
- Practice address
- 4800 Kawaihau Road, Kapaa, HI 96746
- Practice phone
- Call (808) 822-4961
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Henry Keiser'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.
Henry Michael Keiser is a nurse practitioner in Kapaa, Hawaii
Henry Keiser practices at Samuel Mahelona Memorial Hospital in Kapaa, Hawaii, part of State of Hawaiʻi.
Henry Keiser's NPI, 1306353016, was assigned on January 3, 2018. Henry Keiser holds Ohio license APRN.CNP.021640.
- NPI
- 1306353016NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9436411907
- NPI enumeration date
- January 3, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (808) 822-4961
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 35
- Medical school graduation
- 2017
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Henry Michael Keiser practices at Samuel Mahelona Memorial Hospital in Kapaa, Hawaii
Henry Keiser's primary practice is Samuel Mahelona Memorial Hospital, at 4800 Kawaihau Road, Kapaa, HI 96746 in Kauai County. The practice phone is (808) 822-4961.
- Samuel Mahelona Memorial Hospital4800 Kawaihau Road, Kapaa, HI 96746 · Kauai CountyPhone(808) 822-4961
Source: Dmand AI Affiliation Data
Henry Michael Keiser is affiliated with 4 sites of care and 2 medical groups
Henry Keiser's primary practice is Samuel Mahelona Memorial Hospital in Kapaa, Hawaii, part of State of Hawaiʻi. Henry Keiser is also affiliated with Wilcox Medical Center. The medical group on file is Samuel Mahelona Memorial Hospital. Dmand AI also links Henry Keiser to 1 more community health center, 1 skilled nursing facility and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Henry Michael Keiser's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Henry Keiser practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Samuel Mahelona Memorial Hospital | 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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Henry Michael Keiser is one of 166 nurse practitioners in Hawaii
Nurse practitioner is Henry Keiser's primary specialty in the NPI Registry, under taxonomy code 363L00000X. Henry Keiser is licensed in Ohio.
Specialties and state licenses
- Nurse practitioner, OhioPrimary
Nurse practitioners near Henry Keiser
Counts of nurse practitioners 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
Henry Michael Keiser treated 14 Medicare patients in 2024, average age 73
CMS counts 14 Medicare patients who saw Henry Keiser in 2024. Their average risk score is 1.47, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Henry Keiser's median patient age at 67, with 59% women.
Henry Keiser'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
- Women59%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Henry Michael Keiser wrote 1,098 Medicare Part D claims in 2024
In 2024, Henry Keiser wrote 1,098 Medicare Part D claims for 129 patients. 85% of them were for generic drugs.
Henry Keiser's Part D claims by kind of drug, 2024
- Generic928 claims85%
- Brand-name158 claims14%
- Other12 claims1%
Drug classes CMS tracks in Henry Keiser's Part D claims, 2024
- Opioids3%28 of 1,098 claims
- Antibiotics4%46 of 1,098 claims
- Antipsychotics, patients 65 and over1%13 of 1,098 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Henry Michael Keiser takes part in Medicare
Henry Keiser accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Henry Michael Keiser received $29 in industry payments in 2025
CMS Open Payments shows 1 general payment to Henry Keiser from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. ConvaTec Inc. paid the most, $29.
Companies that paid Henry Keiser the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Henry Michael Keiser'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 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 (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Henry Michael Keiser
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Henry Michael Keiser's NPI number?
Henry Michael Keiser's NPI number is 1306353016. It was assigned on January 3, 2018, and it is active in the NPI Registry.
What does Henry Michael Keiser specialize in?
Henry Michael Keiser is a nurse practitioner in Kapaa, Hawaii. The primary specialty in the NPI Registry is Nurse Practitioner (taxonomy code 363L00000X).
Where does Henry Michael Keiser practice?
Henry Keiser practices at 4800 Kawaihau Road, Kapaa, HI 96746. Henry Keiser's primary practice is Samuel Mahelona Memorial Hospital in Kapaa, Hawaii, part of State of Hawaiʻi. Dmand AI also links Henry Keiser to 1 community health center, 1 skilled nursing facility and 1 medical group.
What is Henry Michael Keiser's office phone number?
The practice phone on file for Henry Keiser is (808) 822-4961.
What is Henry Michael Keiser's medical license number?
Henry Keiser holds Ohio license APRN.CNP.021640.
Which hospitals is Henry Michael Keiser affiliated with?
Henry Keiser practices at Samuel Mahelona Memorial Hospital in Kapaa, Hawaii. Henry Keiser is also affiliated with Wilcox Medical Center.
What medical group is Henry Michael Keiser part of?
Henry Keiser is linked to Samuel Mahelona Memorial Hospital. Dmand AI links Henry Keiser to 1 more medical group.
Does Henry Michael Keiser accept Medicare?
Yes. CMS lists Henry Keiser as accepting Medicare assignment.
How many Medicare patients does Henry Michael Keiser see?
CMS counts 14 Medicare patients who saw Henry Keiser in 2024, with an average age of 73.
Has Henry Michael Keiser received payments from drug or device companies?
CMS Open Payments shows $29 in general payments to Henry Keiser from 1 company from 2025 to 2025. The largest total came from ConvaTec Inc.
How long has Henry Michael Keiser been practicing?
Henry Keiser graduated from medical school in 2017, 9 years ago.
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