Mariko Katherine Johnson, M.D.
Endocrinology, Diabetes & Metabolism
Mariko Katherine Johnson is an Endocrinology, Diabetes & Metabolism specialist based in Honolulu, HI with over 21 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Mariko Katherine Johnson, M.D. has practiced internal medicine for 21+ years, working in independent practice. She graduated from Columbia University College of Physicians and Surgeons in 2005 and has 21+ years of clinical experience. Among her Medicare patients, common conditions include hypertension, high cholesterol, and osteoporosis (per CMS data).
Older · 1737dNPPES updated 2021-08-21 · verify NPI on CMS · Verify license at Hawaii Medical Board
How Does This Doctor Compare?
Medicare Patients
108
Unique beneficiaries
Standard volumePrescription Recipients
105
Patients prescribed
Prescriptions Written
432
Total claims
Total Medicare drug cost: $139k
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages Hypertension, High Cholesterol, and Osteoporosis.
High blood pressure — a leading risk factor for heart disease and stroke
Elevated cholesterol or triglycerides that increase heart disease risk
Weakened bones that are more prone to fractures, common in older adults
Joint inflammation causing pain, swelling, and stiffness
Gradual loss of kidney function over time, often linked to diabetes or hypertension
A condition where the body cannot properly regulate blood sugar levels
Diseases involving abnormal cell growth with potential to spread to other body parts
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 2005
Columbia University Vagelos College of Physicians and Surgeons
Board certified · Aug 20, 2021
Self-reported via NPPES
21 years in practice
Experienced
Endocrinologists treat hormonal and metabolic disorders including diabetes (type 1 and 2), thyroid disease, osteoporosis, adrenal disorders, pituitary conditions, and polycystic ovary syndrome (PCOS).
Taxonomy: 207RE0101X
Education & Training
Columbia University College of Physicians and Surgeons (Class of 2005)
Virtual Endocrinology, Diabetes & Metabolism Care With Mariko Katherine Johnson
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mariko Katherine Johnson for blood pressure monitoring, cholesterol management, follow-up consultations — no travel to Honolulu required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Mariko Katherine Johnson
Dr. Johnson is listed as active in the NPI registry with telehealth listed in Honolulu, HI. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (808) 691-1000.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.
Contact Mariko Katherine Johnson
Practice Location
1301 Punchbowl St, Honolulu, HI 96813-2499
Mailing Address
1301 Punchbowl St, Honolulu, HI 96813-2499
This is a provider directory. Contact the office directly to schedule appointments.
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