Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mary Ann Santos Pefanco, MD

Individual provider Internal Medicine Physician · NPI 1780769703

Mary Ann Santos Pefanco, MD practises Geriatric Medicine in Hilo, Hawaii. Qualified in 1999, 27 years ago. Practices with King County Public Hospital District No 2, a 585-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Hawaii.

Years since qualifying
27
Licensed in
HI
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

1178B Kinoole St
Hilo, HI 96720-4133 Not confirmed with CMS for 18 years — call before visiting
Phone: (808) 969-1427
Fax: (808) 961-4909
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence MD13875 (HI)

Record details

NPI number1780769703
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 26, 2006
Last updated in NPPESMarch 20, 2008

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyGERIATRIC MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice King County Public Hospital District No 2 — 585 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients326
Services billed 1,513 a service is one billed item, such as a visit, a test or a procedure
Average patient age83

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at King County Public Hospital District No 2

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 585 clinicians in the practice; 12 are shown here.

Other providers in Hilo