Mary Katherine Warren, M.D.
Adult Medicine Physician · Kailua Kona, HI
Mary Katherine Warren, M.D. is an adult medicine physician with a practice address in Kailua Kona, Hawaii, and NPI 1962544122, issued on Feb 13, 2007. Check the license (Hawaii 9630, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Mary Katherine Warren
- Credential
- M.D.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- 9630 HI
Self-reported in NPPES; status is on the state search - Practice location
- 75-5995 Kuakini Hwy, Kailua Kona, HI 96740
- Phone
- (808) 329-2500
- Enumerated
- Feb 13, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (808) 334-1808
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 12 in Hawaii → Look up another NPI →
Also registered at 75-5995 Kuakini Hwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Katherine Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license 9630Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
93% fewer Medicare Part D claims than the average adult medicine physician in 2024
225 Medicare Part D claims for 38 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Lorazepam24 claims
- Levothyroxine Sodium15 claims
- Azithromycin13 claims
- Losartan Potassium11 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.
Mary Katherine Warren among 12 adult medicine physician records in Hawaii
Mary Katherine Warren, M.D. is one of 12 adult medicine physician records with a practice address in Hawaii. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 42% of them.
- NPI issued2007 · 42% of these records are older, 42% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 58% of these records are
- Record last updated2007 · 75% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207QA0505X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in Hawaii
There are 12 adult medicine physician records in Hawaii.
All 12 in Hawaii → Every provider in Kailua Kona → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Joel AlbusKaneohe, HI 967441316664386
- Robert Bird, M.D.Kahului, HI 967321982790655
- Gayland Yee, M.D.Kihei, HI 967531083790653
- Hart Miller, MDPahoa, HI 967781831109933
- Jason Lam, MDWahiawa, HI 967861114033040
- Javaid Akhter, M.D.Wailuku, HI 967931376734806
- Jennifer Frank, MDHonolulu, HI 968131639158181
- Michelle Wong, MDHonolulu, HI 968141851618474
Common questions
What is Mary Katherine Warren, M.D.'s NPI number?
Mary Katherine Warren, M.D.'s National Provider Identifier (NPI) is 1962544122, issued on Feb 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Mary Katherine Warren, M.D. located?
The NPPES record lists a practice address at 75-5995 Kuakini Hwy, Kailua Kona, HI, 96740. Phone: (808) 329-2500. Providers update this record themselves, so call before visiting.
How can I verify Mary Katherine Warren, M.D.'s license?
NPPES lists Hawaii license number 9630, 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 Mary Katherine Warren, M.D. prescribe under Medicare Part D?
In 2024, Mary Katherine Warren, M.D. had 225 Medicare Part D claims for 38 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.