Dr. Samuel Ernest William Johnsen, MD
- Medicare services, 2024
- 822
- Medicare patients, 2024
- 180
- Part D claims, 2024
- 5,021
- Hospital affiliations
- 1
- Industry payments
- $12,894
- Practice address
- 180 Dickenson St, Lahaina, HI 96761
- Practice phone
- Call (808) 344-2053
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Laulea Health Center
Primary care practice · Lahaina, Hawaii
Find Dr. Johnsen'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.
Dr. Samuel Ernest William Johnsen is an internist in Lahaina, Hawaii
Dr. Johnsen practices at Laulea Health Center in Lahaina, Hawaii.
Dr. Johnsen's NPI, 1669491858, was assigned on July 19, 2006. Dr. Johnsen holds Hawaii license MD12422.
- NPI
- 1669491858NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456486315
- NPI enumeration date
- July 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (808) 344-2053
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Samuel Ernest William Johnsen practices at Laulea Health Center in Lahaina, Hawaii
Dr. Johnsen's primary practice is Laulea Health Center, at 180 Dickenson St, Lahaina, HI 96761. The practice phone is (808) 344-2053.
- Laulea Health Center180 Dickenson St, Lahaina, HI 96761Phone(808) 344-2053
Source: Dmand AI Affiliation Data
Dr. Samuel Ernest William Johnsen is affiliated with 3 sites of care and 1 medical group
Dr. Johnsen's primary practice is Laulea Health Center in Lahaina, Hawaii. Dr. Johnsen is also affiliated with Maui Memorial Medical Center. The medical group on file is Laulea Health Center. Dmand AI also links Dr. Johnsen to 1 more home health agency, named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Samuel Ernest William Johnsen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnsen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Laulea Health Center | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Samuel Ernest William Johnsen is one of 771 internists in Hawaii
Internal medicine is Dr. Johnsen's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Johnsen is licensed in Hawaii.
Specialties and state licenses
- Internal medicine, HawaiiPrimary
Internists near Dr. Johnsen
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. Samuel Ernest William Johnsen billed Medicare for 822 services in 2024
CMS data shows 822 Medicare services from Dr. Johnsen across 7 procedure codes in 2024, for 180 Medicare patients. Medicare paid $44,585 for them. Every service was in an office.
Dr. Johnsen's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5672024: 5356%
- Other services
- 2023: 02024: 242
- Tests and treatments
- 2023: 202024: 3260%
- Lab and pathology
- 2023: 02024: 13
Dr. Johnsen compared with the Hawaii median for internists, 2024
- Dr. Johnsen
- Hawaii median
- Medicare services
- 822vs 3422.4 times
- Medicare patients
- 180vs 12841% above
- Part D claims
- 4,332vs 6706.5 times
Medians across 699 internists in Hawaii with Dmand AI profiles that report each measure.
Dr. Johnsen'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnsen and other internists in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Samuel Ernest William Johnsen treated 180 Medicare patients in 2024, average age 77
CMS counts 180 Medicare patients who saw Dr. Johnsen in 2024. The largest group is 75 to 84, with 76 patients. 75% of them have high cholesterol, and 67% have high blood pressure. Their average risk score is 1.09, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Johnsen's median patient age at 72, with 51% women.
Dr. Johnsen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Johnsen's Medicare patients by sex, 2024
- Women9653%
- Men8447%
Chronic conditions among Dr. Johnsen's Medicare patients, 2024
- High cholesterol75%
- High blood pressure67%
- Arthritis37%
- Chronic kidney disease31%
- Ischemic heart disease22%
- Diabetes19%
- Atrial fibrillation18%
- Cancer18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Johnsen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Samuel Ernest William Johnsen wrote 5,021 Medicare Part D claims in 2024
In 2024, Dr. Johnsen wrote 5,021 Medicare Part D claims for 300 patients. 87% of them were for generic drugs. CMS names the drug for 4,332 of them, across 108 drugs with 11 or more claims each, at $418,195 in total drug cost. In 2023, CMS named 4,011 claims across 97 drugs.
Dr. Johnsen's Part D claims by kind of drug, 2024
- Generic4,382 claims87%
- Brand-name and other639 claims13%
Dr. Johnsen'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. Johnsen's Part D claims, 2024
- Opioids9%474 of 5,021 claims
- Antibiotics3%140 of 5,021 claims
- Antipsychotics, patients 65 and over0%19 of 5,021 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: 4,0112024: 4,3328%
Drugs named by CMS: 108 in 2024, 97 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
Dr. Samuel Ernest William Johnsen ranks in the 62nd percentile for removal of skin lesions in Medicare
Dr. Johnsen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Johnsen as offering telehealth. CMS counts 15 procedures of removal of skin lesions by Dr. Johnsen, more than 62% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Johnsen ranks in Medicare procedure volume
- Removal of skin lesions
- 62nd percentile15 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. Samuel Ernest William Johnsen received $12,894 in industry payments from 2016 to 2025
CMS Open Payments shows 584 general payments to Dr. Johnsen from 36 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 95% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $1,903.
General payments to Dr. Johnsen by program year, 2016 to 2025
General payments to Dr. Johnsen by kind, 2016 to 2025
- Food and beverage$12,27195%
- Travel and lodging$4083%
- Education$2152%
Companies that paid Dr. Johnsen the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Samuel Ernest William Johnsen'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 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) |
| 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 Dr. Samuel Ernest William Johnsen
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. Samuel Ernest William Johnsen's NPI number?
Dr. Samuel Ernest William Johnsen's NPI number is 1669491858. It was assigned on July 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Samuel Ernest William Johnsen?
Dr. Samuel Ernest William Johnsen is an internist in Lahaina, Hawaii. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Samuel Ernest William Johnsen practice?
Dr. Johnsen practices at 180 Dickenson St, Lahaina, HI 96761. Dr. Johnsen's primary practice is Laulea Health Center in Lahaina, Hawaii. Dmand AI also links Dr. Johnsen to 1 home health agency.
What is Dr. Samuel Ernest William Johnsen's office phone number?
The practice phone on file for Dr. Johnsen is (808) 344-2053.
What is Dr. Samuel Ernest William Johnsen's medical license number?
Dr. Johnsen holds Hawaii license MD12422.
Which hospitals is Dr. Samuel Ernest William Johnsen affiliated with?
Dr. Johnsen is affiliated with Maui Memorial Medical Center.
What medical group is Dr. Samuel Ernest William Johnsen part of?
Dr. Johnsen is linked to Laulea Health Center.
Does Dr. Samuel Ernest William Johnsen accept Medicare?
Yes. CMS data shows Dr. Johnsen billed Medicare for 822 services in 2024, and Dr. Johnsen accepts Medicare assignment.
Does Dr. Samuel Ernest William Johnsen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Johnsen as offering telehealth services.
How many Medicare patients does Dr. Samuel Ernest William Johnsen see?
CMS counts 180 Medicare patients who saw Dr. Johnsen in 2024, with an average age of 77.
Show 4 more questionsShow fewer questions
What services does Dr. Samuel Ernest William Johnsen bill to Medicare?
In 2024, Dr. Johnsen's most billed Medicare services were office visit, established patient (99213), medicare service (G2211) and office visit, established patient (99214).
What drugs does Dr. Samuel Ernest William Johnsen prescribe most?
In 2024 Medicare Part D data, Dr. Johnsen's most prescribed drugs by claims were Atorvastatin Calcium, Rosuvastatin Calcium and Hydrocodone-Acetaminophen.
Has Dr. Samuel Ernest William Johnsen received payments from drug or device companies?
CMS Open Payments shows $12,894 in general payments to Dr. Johnsen from 36 companies from 2016 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Samuel Ernest William Johnsen been practicing?
Dr. Johnsen graduated from medical school in 1992, 34 years ago.
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