Samuel Johnsen, M.D.
NPI 1669491858 · Internal Medicine Physician · Lahaina, HI
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Samuel Johnsen, M.D. is a Internal Medicine Physician provider in Lahaina, HI (NPI 1669491858).
Provider details
- NPI number
- 1669491858
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD12422 (HI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
822 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 298 | $94 |
| 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'SG2211 | 242 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 225 | $133 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 17 | $15 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 15 | $15 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 108 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 313 | 87 |
| Rosuvastatin Calcium | 170 | 61 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 139 | 28 |
| Levothyroxine Sodium | 139 | 36 |
| Amlodipine Besylate | 137 | 40 |
| Lisinopril | 134 | 37 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$858 across 41 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2018-10-02
Frequently asked questions
- What is Samuel Johnsen's NPI number?
- Samuel Johnsen's National Provider Identifier (NPI) is 1669491858, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Samuel Johnsen's specialty?
- Samuel Johnsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Samuel Johnsen located?
- Samuel Johnsen's practice location on file with NPPES is 180 Dickenson St Ste 103, Lahaina, HI 96761-1215.
- What is Samuel Johnsen's phone number?
- The practice phone number listed in the NPPES registry for Samuel Johnsen is (808) 214-5985.
- Does Samuel Johnsen accept Medicare?
- Samuel Johnsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Samuel Johnsen's NPI active?
- Yes — Samuel Johnsen's NPI (1669491858) is active in the NPPES registry as of the last update on 2018-10-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.