Mary Ann Santos Pefanco, M.D.
Mary Ann Santos Pefanco is an Internal Medicine specialist based in Hilo, HI with over 27 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.
Also practices: INTERNAL MEDICINE
With over 27 years in internal medicine, Mary Ann Santos Pefanco, M.D. is a long-established internist in Hilo. With 27+ years of experience, she has been practicing in the Hilo area. CMS Medicare data shows her patients commonly have hypertension, high cholesterol, and arthritis. CMS MIPS quality score: 83.95/100 (2023).
At a glance
- Prescribes opioids less than 29% of reporting doctors in Hawaii
- Uses generic medications more than 73% of reporting doctors in Hawaii
- Federal MIPS score higher than 27% of MIPS-scored doctors in Hawaii
- Virtual visits available — no app or travel required
Older · 6638dNPPES updated 2008-03-20 · verify NPI on CMS · Verify license at Hawaii Medical Board
Contact & Location
Practice Location
1178b Kinoole St, Hilo, HI 96720-4133
How Does This Doctor Compare?
Based on Medicare data, this doctor prescribes opioid pain medications conservatively, favors affordable generic drugs over brand-name ones.
MIPS Score
202383.95/100
Hawaii avg: 83.7 · US avg: 83.6
✓ Higher than most doctors nationally(+0.4 pts)
How the government rates this doctor's Medicare care quality. Scores above 75 are considered good.
Opioid Rx
↓ Lower = better2.67%
Hawaii avg: 5.3 · US avg: 5.1
✓ Higher than most doctors nationally(-2.4 pts)
2.67% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.
Generic Rx
↑ Higher = better89.8%
Hawaii avg: 81.8 · US avg: 82.8
✓ Higher than most doctors nationally(+7 pts)
Better than 73% of reporting doctors in HawaiiHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
389
Unique beneficiaries
Standard volumePrescription Recipients
513
Patients prescribed
Prescriptions Written
7,827
Total claims
Total Medicare drug cost: $547k
Percentile rankings compared against 262 reporting peers in Hawaii.
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 Arthritis.
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↑ More patients than average (+5%) — a focus area for this doctor
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+2%) — a focus area for this doctor
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-2%) — less common here
Weakened bones that are more prone to fractures, common in older adults
US avg: 18.1%↑ More patients than average (+21%) — a focus area for this doctor
Excessive worry or fear that interferes with daily life
US avg: 34.1%↑ More patients than average (+1%) — a focus area for this doctor
Conditions affecting emotional state, including depression and bipolar disorder
A mood disorder causing persistent sadness and loss of interest in activities
US avg: 31.8%Gradual loss of kidney function over time, often linked to diabetes or hypertension
US avg: 29.6%↑ More patients than average (+1%) — a focus area for this doctor
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.
27 years in practice
Experienced
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Taxonomy: 207R00000X
Mailing address
224 Haili St Ste B, Hilo, HI 96720-2975
Differs from practice location
Virtual Internal Medicine Care With Mary Ann Santos Pefanco
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Mary Ann Santos Pefanco for blood pressure monitoring, cholesterol management, arthritis follow-ups — no travel to Hilo 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 Mary Ann Santos Pefanco
Dr. Pefanco is listed as active in the NPI registry with telehealth listed in Hilo, HI. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (808) 969-1427.
Sourced from CMS NPPES · OIG LEIE · CMS QPP 2023 · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.
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Contact Mary Ann Santos Pefanco
Practice Location
1178b Kinoole St, Hilo, HI 96720-4133
Mailing Address
224 Haili St Ste B, Hilo, HI 96720-2975
This is a provider directory. Contact the office directly to schedule appointments.
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