Katherine Ann Williams, M.D.
Internal Medicine Physician · Honolulu, HI
Katherine Ann Williams, M.D. is an internal medicine physician with a practice address in Honolulu, Hawaii, and NPI 1467527556, issued on Nov 22, 2006. Check the license (Hawaii MD-5257, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Katherine Ann Williams
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- MD-5257 HI
Self-reported in NPPES; status is on the state search - Practice location
- 888 S King St, Honolulu, HI 96813
- Phone
- (808) 522-4000
- Enumerated
- Nov 22, 2006
- Record last updated
- Mar 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (808) 522-4513
- Medicaid ID
- 022263 01 HI
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Also registered at 888 S King St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Ann Williams in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-5257Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% more Medicare Part D claims than the average internal medicine physician in 2024
4,853 Medicare Part D claims for 517 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 27 claims were for opioids.
Most prescribed
- Atorvastatin Calcium600 claims
- Losartan Potassium377 claims
- Amlodipine Besylate348 claims
- Levothyroxine Sodium192 claims
- Metformin Hcl158 claims
- Simvastatin152 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.
Katherine Ann Williams among 902 internal medicine physician records in Hawaii
Katherine Ann Williams, 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 2006, is newer than 4% of them.
- NPI issued2006 · 4% of these records are older, 55% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 54% of these records are
- Record last updated2012 · 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
- Justin Barratt, M.D.Honolulu, HI 968131861481574
- Dee-Ann Carpenter, MDHonolulu, HI 968131720080799
- Bo-Yin ChangHonolulu, HI 968131356314777
- Cleland Child, M.D.Honolulu, HI 968131548242076
- Dominic Chow, M.D.Honolulu, HI 968131063464972
- Michael Dung, MDHonolulu, HI 968131811963986
- Theodore Harada, MDHonolulu, HI 968131558324988
- Janet Kao, M.D.Honolulu, HI 968131467459131
Common questions
What is Katherine Ann Williams, M.D.'s NPI number?
Katherine Ann Williams, M.D.'s National Provider Identifier (NPI) is 1467527556, issued on Nov 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Ann Williams, M.D. located?
The NPPES record lists a practice address at 888 S King St, Honolulu, HI, 96813. Phone: (808) 522-4000. Providers update this record themselves, so call before visiting.
How can I verify Katherine Ann Williams, M.D.'s license?
NPPES lists Hawaii license number MD-5257, 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 Katherine Ann Williams, M.D. prescribe under Medicare Part D?
In 2024, Katherine Ann Williams, M.D. had 4,853 Medicare Part D claims for 517 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.