Mariko Katherine Johnson, M.D.
Endocrinology, Diabetes & Metabolism Physician · Honolulu, HI
Mariko Katherine Johnson, M.D. is an endocrinology, diabetes & metabolism physician with a practice address in Honolulu, Hawaii, and NPI 1629279617, issued on May 29, 2007. Check the license (Hawaii MD-16098, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mariko Katherine Johnson
- Credential
- M.D.
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- MD-16098 HI
2005016358 MO
Self-reported in NPPES; status is on the state search - Practice location
- 1301 Punchbowl St, Honolulu, HI 96813
- Phone
- (808) 691-1000
- Enumerated
- May 29, 2007
- Record last updated
- Aug 21, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110913000115); accepts Medicare assignment
- Medical or professional school
- Columbia University College Of Physicians And Surgeons, 2005
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 1301 Punchbowl St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brenda Abbotnakandakari, RNDiabetes Educator Registered Nurse1760705248
- Janette AbramowitzPsychiatry Physician1275952335
- Natalie AdolfPhysician Assistant1396282414
- Hessam Afshari, MDEmergency Medicine Physician1811217573
- Cheryl Ann Afuso-Sumimoto, APRNOncology Clinical Nurse Specialist1750929253
- Kyan Renie AgbayaniInternal Medicine Physician1083101323
Verify Mariko Katherine Johnson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-16098Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
76% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
621 Medicare Part D claims for 138 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Levothyroxine Sodium246 claims
- Synthroid55 claims
- Alendronate Sodium30 claims
- Prolia28 claims
- Prednisone22 claims
- Risedronate Sodium20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Queens University Medical GroupHonolulu, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Hawaii
There are 24 endocrinology, diabetes & metabolism physician records in Hawaii.
Other endocrinology, diabetes & metabolism physician records in Hawaii
- Mehtap Berkmen, MDWailuku, HI1467481150
- Isabel Casimiro, M.D., PH.D.Honolulu, HI1942615596
- Sheri Chinen, M.D.Aiea, HI1487873600
- Diane Elegino-Steffens, MDTripler Army Medical Center, HI1912227356
- Cassandra Godar, MDTripler Amc, HI1053878827
- Till Hansen, M.D.Wailuku, HI1720173214
- Eric Lee, DO, MPH, MSHonolulu, HI1306308796
- Anna Melissa Lo, M.D.Honolulu, HI1417308685
- Jennifer Loh, MDHonolulu, HI1497919914
- Maureen Maguire, MDWailuku, HI1477653541
Common questions
What is Mariko Katherine Johnson, M.D.'s NPI number?
Mariko Katherine Johnson, M.D.'s National Provider Identifier (NPI) is 1629279617, issued on May 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mariko Katherine Johnson, M.D. located?
The NPPES record lists a practice address at 1301 Punchbowl St, Honolulu, HI, 96813. Phone: (808) 691-1000. Providers update this record themselves, so call before visiting.
How can I verify Mariko Katherine Johnson, M.D.'s license?
NPPES lists Hawaii license number MD-16098, as entered by the provider. Search the Hawaii Medical Board at https://cca.hawaii.gov/pvl/boards/medical/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mariko Katherine Johnson, M.D. prescribe under Medicare Part D?
In 2024, Mariko Katherine Johnson, M.D. had 621 Medicare Part D claims for 138 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.