Christal Nishikawa, M.D.
Internal Medicine Physician · Honolulu, HI
Christal Nishikawa, M.D. is an internal medicine physician with a practice address in Honolulu, Hawaii, and NPI 1629513924, issued on Dec 22, 2016. Check the license (Hawaii MDR-####, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Christal Nishikawa
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MDR-#### HI
Self-reported in NPPES; status is on the state search - Practice location
- 1356 Lusitana St, Honolulu, HI 96813
- Phone
- (808) 586-7482
- Enumerated
- Dec 22, 2016
- Record last updated
- Dec 22, 2016 (not updated in 10 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20211005001356); accepts Medicare assignment
- Medical or professional school
- Loma Linda University School Of Medicine, 2016
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Also registered at 1356 Lusitana St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Christal Nishikawa in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MDR-####Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
52% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,522 Medicare Part D claims for 141 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 24 claims were for opioids.
Most prescribed
- Atorvastatin Calcium68 claims
- Levothyroxine Sodium67 claims
- Lisinopril65 claims
- Losartan Potassium60 claims
- Amlodipine Besylate55 claims
- Mirtazapine53 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 73.3 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $97.70
1 payment: food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Orohealth Corporation A Non Profit Healthcare SystemOroville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Christal Nishikawa among 902 internal medicine physician records in Hawaii
Christal Nishikawa, M.D. is one of 902 internal medicine physician records with a practice address in Hawaii. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 73% of them.
- NPI issued2016 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 54% of these records are
- Graduated2016 · median 2001 among the 491 with a school on file
- Record last updated2016 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
579 internal medicine physician records list a practice address in Honolulu
They are 579 of the 12,408 NPPES records with a practice address in Honolulu, and 902 internal medicine physician records in Hawaii.
All 902 in Hawaii → Every provider in Honolulu → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Dominic Chow, M.D.Honolulu, HI 968131063464972
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Common questions
What is Christal Nishikawa, M.D.'s NPI number?
Christal Nishikawa, M.D.'s National Provider Identifier (NPI) is 1629513924, issued on Dec 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Christal Nishikawa, M.D. located?
The NPPES record lists a practice address at 1356 Lusitana St, Honolulu, HI, 96813. Phone: (808) 586-7482. Providers update this record themselves, so call before visiting.
How can I verify Christal Nishikawa, M.D.'s license?
NPPES lists Hawaii license number MDR-####, 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 Christal Nishikawa, M.D. prescribe under Medicare Part D?
In 2024, Christal Nishikawa, M.D. had 1,522 Medicare Part D claims for 141 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Christal Nishikawa, M.D.'s MIPS final score?
The 2023 MIPS final score is 73.3 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.