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Edit this profileAt a glance
- 180 Dickenson St Ste 103, Lahaina, HI 96761
About Dr. Johnsen
Samuel ERNEST WILLIAM Johnsen, M.D. practices internal medicine in Lahaina, HI. According to Medicare claims data, Samuel cared for 432 Medicare patients across 822 services. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient', and established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more. The provider's National Provider Identifier (NPI) is 1669491858.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (808) 214-5985
- Email not available
Practice Locations
180 DICKENSON ST STE 103
Lahaina, HI 96761
Conditions Commonly Evaluated or Treated
Within Internal Medicine generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Cancer Prevention
Cancer risk
Environmental health
- Asbestos Exposure
- Contaminated drinking water exposure
- Heat exhaustion and heat stroke
- Radon gas exposure
- Tick bite and Lyme disease risk
- Toxic Mold Exposure
- Wildfire smoke and air pollution exposure
- Workplace Chemical Exposure
General wellness
Heart health
Infectious Disease
Infectious disease
Kidney health
Lifestyle & wellness
Lifestyle health
Longevity
Metabolic & Lifestyle
Occupational health
Occupational Health
Rashes & allergy
Sexual Health
Sexual health
Substance use
Travel health
Wellness and energy
Workplace health
Most searched conditions
Cardiometabolic
Digestive and liver
Endocrine, blood, and bone
Kidney and urinary
Respiratory
Blood & Circulation
- Blood clots
Blood disorders
- Anemia
Brain & Nerves
- Alzheimer's disease
Brain and nerves
- Vertigo
Cardiac and vascular
- AFib
Digestive
- Diverticulitis
Heart & Circulation
- Heart disease
Infections
Kidney & Bladder
Lungs & Breathing
Mental Health
- Generalized anxiety disorder
- Insomnia and Sleep Problems
Neurologic and behavioral
Pain
Rheumatologic and pain
Procedures & services
Addiction & habits
Cancer screening
- Colon Cancer Screening Referral
- Lung cancer screening consult
- Mammogram Referral
Cancer Screening
Checkups & exams
Chronic illness
Diagnostics & screening
Environmental health
Fitness & body composition
Heart & Circulation
- Blood Pressure Check
- Heart monitor
Heart & circulation
Heart health
- Cardiac Stress Test Referral
Hospital-based procedures
- Inpatient medical management
Imaging referral
- Abdominal Ultrasound Referral
Immunizations
Infection & Microbiology Tests
- STI and STD Screening
- H. Pylori Breath Test
Lifestyle & Prevention
Longevity
Lower endoscopy
Lungs & Breathing
Metabolic & Weight
- Weight Loss Injections and Medication
Metabolic health
Occupational health
Occupational Health
Office Procedures
- Skin Tag and Mole Removal
- Vitamin B12 Injections
- Wart Removal
Preventive and evaluation
- Preoperative medical clearance
- Medication management
- Post-hospital transitional care
Preventive imaging
Preventive screening
Routine Blood Tests
Screening & labs
Screening and diagnostic testing
- Blood pressure screening
- Cancer screening and prevention planning
- Diabetes and prediabetes screening
- EKG
- Spirometry
Screenings & Diagnostics
- Diabetes Screening and A1C Test
- Bone Density Scan Referral
Travel Health
Travel medicine
Wellness
Wellness & Screening
Workplace health
Skin growths
Sleep
- At-home sleep test
Most searched procedures
Bones & Joints
- Trigger Point Injections
Brain and nerves
Digestive
- Endoscopy
Exams & Consultations
Lab tests
Minor procedures
- Ingrown toenail removal
- Suture removal
Office procedures
Pain management
- Knee Joint Injection
Preventive & Routine Care
Sexual health
- STI Testing
Procedures Most Often Billed to Medicare
822 services · 432 patients · 7 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report | Treatment | 93000 |
17 | Less often than most peers in Internal Medicine |
| Injection of drug or substance under skin or into muscle | Treatment | 96372 |
15 | Less often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
298 | More often than most peers in Internal Medicine |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient' | Billing code | G2211 |
242 | More often than most peers in Internal Medicine |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
225 | As often as other peers in Internal Medicine |
| Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) | Lab test | 87811 |
13 | Less often than most peers in Internal Medicine |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
12 | Less often than most peers in Internal Medicine |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1992 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 8
Providers in HI who bill this service to Medicare most often.
Common questions
What is Samuel ERNEST WILLIAM Johnsen's specialty?
Samuel ERNEST WILLIAM Johnsen is an internist in Lahaina, HI. That is the designation recorded for this NPI in the federal registry, where it is listed as “Internal Medicine”.
NPI registry
Where can I find Samuel ERNEST WILLIAM Johnsen?
Samuel ERNEST WILLIAM Johnsen is listed at 180 Dickenson St Ste 103, Lahaina, HI 96761. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Samuel ERNEST WILLIAM Johnsen?
The number on file is (808) 214-5985. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Samuel ERNEST WILLIAM Johnsen's NPI number?
Samuel ERNEST WILLIAM Johnsen's National Provider Identifier is 1669491858. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Samuel ERNEST WILLIAM Johnsen's education?
Samuel ERNEST WILLIAM Johnsen attended Other, graduating in 1992. This comes from the CMS National Downloadable File.
CMS public data
How long has Samuel ERNEST WILLIAM Johnsen been practicing?
Samuel ERNEST WILLIAM Johnsen has 34 years experience. Calculated from a graduation year of 1992, reported in the CMS National Downloadable File.
CMS public data
What is Samuel ERNEST WILLIAM Johnsen known for?
According to Medicare billing data, Samuel ERNEST WILLIAM Johnsen provides treatments such as routine electrocardiogram using at least 12 leads with interpretation and report and injection of drug or substance under skin or into muscle, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Samuel ERNEST WILLIAM Johnsen confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Samuel ERNEST WILLIAM Johnsen. If this is you, claiming it is free.
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