DR. MARIKO KATHERINE JOHNSON M.D.
NPI 1629279617
Internal Medicine - Endocrinology, Diabetes & Metabolism in Honolulu, HI

Q: What is Mariko Johnson's NPI number?

The NPI number for Mariko Johnson is 1629279617. It was assigned to this individual provider in the NPPES registry on May 29, 2007.

Q: What is Mariko Johnson's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Q: When was this NPI record last updated?

The NPPES record for Mariko Johnson was last updated on August 21, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since May 29, 2007PECOS EnrolledAccepts Medicare Assignment

1301 PUNCHBOWL ST, HONOLULU, HI 96813(808) 691-1000 Get Directions Write a Review

NPPES record last updated: August 21, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

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About Dr. Mariko Katherine Johnson M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. MARIKO KATHERINE JOHNSON M.D. (NPI 1629279617) is an individual endocrinology, diabetes & metabolism provider in Honolulu, Hawaii, licensed in Hawaii (MD-16098) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with The Queens Medical Center, and is a graduate of Columbia University College Of Physicians And Surgeons (2005).

NPPES Registry Identity

NPI1629279617

Entity TypeIndividualFemale

Primary Taxonomy207RE0101X

Provider Legal NameDR. MARIKO KATHERINE JOHNSONCredential: M.D.

Location Address1301 PUNCHBOWL STHonolulu, HI 96813-2499

Mailing Address1301 Punchbowl StHonolulu, HI 96813-2499 · (808) 691-1000

Phone(808) 691-1000

Sole ProprietorYes

Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 2005

Enumeration DateMay 29, 2007

Last NPPES UpdateAugust 21, 2021

NPPES CertifiedAugust 21, 2021

✔ NPI 1629279617 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians

Taxonomy Code207RE0101X

License✔ Licensed in HI · MD-16098

Definition

An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.

Also ListedInternal MedicineTaxonomy 207R00000X · License 2005016358 (MO)

1301 PUNCHBOWL ST, Honolulu, HI 96813

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include HMSA.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Mariko Katherine Johnson M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9436320090

PECOS Enrollment IDI20110913000115

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Mariko Johnson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Queens University Medical Group

Same address

Multi-Specialty

1301 PUNCHBOWL ST
Honolulu, HI 96813

Reassigned Medicare billing, Hawaii enrollment
859 clinicians in this Medicare group

NPI 1891441382 (808) 691-1000

The Queen's Medical Center

Same address

General Acute Care Hospital

1301 PUNCHBOWL ST
Honolulu, HI 96813

Reassigned Medicare billing, Hawaii enrollment
Medicare enrollment name: The Queens Medical Center
809 clinicians in this Medicare group

NPI 1487693586 (808) 538-9011

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

186 services114 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

66 services12 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

34 services34 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

16 services16 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

The Queens Medical Center

Acute Care Hospitals · Honolulu, HI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number120001

Location1301 Punchbowl StHonolulu, HI 96813 · Honolulu County

Emergency services Birthing friendly

North Hawaii Community Hospital, Inc

Acute Care Hospitals · Kamuela, HI

2/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number120028

Location67 1125 Mamalahoa HighwayKamuela, HI 96743 · Hawaii County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96813 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$136.68 typical visit price

range $60.53 – $180.05

Typical copayment $34.17 (range $15.13 – $45.01)

Most-billed visit code 99204

Established Patient

$105.65 typical visit price

range $20.09 – $147.56

Typical copayment $26.41 (range $5.02 – $36.89)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

NISHAL BRAHMBHATT MD

Internal Medicine (Critical Care Medicine)