Paul W. Grandon, MD
Internal Medicine Physician · Wailuku, HI
Paul W. Grandon, MD is an internal medicine physician with a practice address in Wailuku, Hawaii, and NPI 1215908959, issued on Jan 31, 2006. Check the license (Hawaii MD-21227, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Paul W. Grandon
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- MD-21227 HI
017275 LA
Self-reported in NPPES; status is on the state search - Practice location
- 55 Maui Lani Pkwy, Wailuku, HI 96793
- Phone
- (808) 243-6050
- Enumerated
- Jan 31, 2006
- Record last updated
- Jul 25, 2022
- Medicaid ID
- 1364738 LA
- Medicare enrollment
- Enrolled (PECOS I20220330000593); accepts Medicare assignment
- Medical or professional school
- Louisiana State University School Of Medicine In New Orleans, 1983
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 902 in Hawaii → Look up another NPI →
Also registered at 55 Maui Lani Pkwy
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Karen Barretto, MDPediatrics Physician1689761231
- Deeva BereraInternal Medicine Physician1902268246
- Malte Breitlow, PHARMD.Pharmacist1619277316
- Errol Buntuyan, MDFamily Medicine Physician1316930548
Verify Paul W. Grandon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-21227Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.8 times the Medicare Part D claims of the average internal medicine physician in 2024
8,880 Medicare Part D claims for 933 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 296 claims were for opioids.
Most prescribed
- Atorvastatin Calcium943 claims
- Amlodipine Besylate388 claims
- Losartan Potassium384 claims
- Lisinopril375 claims
- Tamsulosin Hcl252 claims
- Albuterol Sulfate Hfa246 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
- Hawaii Permanente Medical Group IncWailuku, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Paul W. Grandon among 902 internal medicine physician records in Hawaii
Paul W. Grandon, MD 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 fileYes · 54% of these records are
- Graduated1983 · median 2001 among the 491 with a school on file
- Record last updated2022 · 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).
39 internal medicine physician records list a practice address in Wailuku
They are 39 of the 1,087 NPPES records with a practice address in Wailuku, and 902 internal medicine physician records in Hawaii.
All 902 in Hawaii → Every provider in Wailuku → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Nolan Arruda, M.D.Wailuku, HI 967931043242209
- Victoria Babushkina, MDWailuku, HI 967931972568483
- Daniel Garcia, M.D.Wailuku, HI 967931689699449
- Russell Garn, M.D.Wailuku, HI 967931033134804
- Arpana Gupta, MDWailuku, HI 967931285668624
- Kristen Gutermuth, M.D.Wailuku, HI 967931558386243
- Heather Haynes, M.D.Wailuku, HI 967931487664587
- Anna Hom, MDWailuku, HI 967931063421733
Common questions
What is Paul W. Grandon, MD's NPI number?
Paul W. Grandon, MD's National Provider Identifier (NPI) is 1215908959, issued on Jan 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Paul W. Grandon, MD located?
The NPPES record lists a practice address at 55 Maui Lani Pkwy, Wailuku, HI, 96793. Phone: (808) 243-6050. Providers update this record themselves, so call before visiting.
How can I verify Paul W. Grandon, MD's license?
NPPES lists Hawaii license number MD-21227, 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 Paul W. Grandon, MD prescribe under Medicare Part D?
In 2024, Paul W. Grandon, MD had 8,880 Medicare Part D claims for 933 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.