Grant S. Keefer, MPAS, PA-C
Physician Assistant · Lahaina, HI
Grant S. Keefer, MPAS, PA-C is a physician assistant with a practice address in Lahaina, Hawaii, and NPI 1437739703, issued on Apr 12, 2021. Check the license with the Hawaii board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Grant S. Keefer
- Credential
- MPAS, PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 3350 Lower Honoapiilani RD Ste 211, Lahaina, HI 96761
- Phone
- (808) 667-7676
- Enumerated
- Apr 12, 2021
- Record last updated
- May 27, 2026
- Medicare enrollment
- Enrolled (PECOS I20220816002940); may accept Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 387 in Hawaii → Look up another NPI →
Also registered at 3350 Lower Honoapiilani RD Ste 211
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Vincent Fussell, MDFamily Medicine Physician1326606781
- Catherine Scott, PA - CPhysician Assistant1518549815
Verify Grant S. Keefer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Hawaii board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
28% fewer Medicare Part D claims than the average physician assistant in 2024
600 Medicare Part D claims for 347 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 22 claims were for opioids.
Most prescribed
- Methylprednisolone61 claims
- Albuterol Sulfate Hfa48 claims
- Amoxicillin-Clavulanate Potass37 claims
- Meloxicam37 claims
- Mupirocin37 claims
- Paxlovid36 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.
Industry payments in 2024: $81.23
4 payments; by number, the most common kind was food and beverage; the largest payer was Pfizer Inc. The 64,719 providers of this specialty with any payment received $841.65 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
- Kaanapali Medical Services IncLahaina, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grant S. Keefer among 387 physician assistant records in Hawaii
Grant S. Keefer, MPAS, PA-C is one of 387 physician assistant records with a practice address in Hawaii. 64% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 71% of them.
- NPI issued2021 · 71% of these records are older, 21% newer
- In a Medicare fileYes · 64% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2021 · median 2017 among the 196 with a school on file
- Record last updated2026 · 38% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 physician assistant records list a practice address in Lahaina
They are 3 of the 195 NPPES records with a practice address in Lahaina, and 387 physician assistant records in Hawaii.
All 387 in Hawaii → Every provider in Lahaina → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Kylie FlickingerLahaina, HI 967611699653147
- Catherine Scott, PA - CLahaina, HI 967611518549815
- Theresa Faust, PALihue, HI 967661952829293
- Terrie Johnson, PALihue, HI 967661316017510
- Jeanne Obert, NP, PALihue, HI 967661558401141
- Ryan Wada, PA-CKoloa, HI 967561225302995
- Donna Banal-Byrnes, PAMakawao, HI 967681144234857
- Shannon Ray, PA-CMakawao, HI 967681366492860
Common questions
What is Grant S. Keefer, MPAS, PA-C's NPI number?
Grant S. Keefer, MPAS, PA-C's National Provider Identifier (NPI) is 1437739703, issued on Apr 12, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Grant S. Keefer, MPAS, PA-C located?
The NPPES record lists a practice address at 3350 Lower Honoapiilani RD Ste 211, Lahaina, HI, 96761. Phone: (808) 667-7676. Providers update this record themselves, so call before visiting.
How can I verify Grant S. Keefer, MPAS, PA-C's license?
Search the Hawaii board that licenses this profession; the NPPES record confirms identity only.
How much does Grant S. Keefer, MPAS, PA-C prescribe under Medicare Part D?
In 2024, Grant S. Keefer, MPAS, PA-C had 600 Medicare Part D claims for 347 beneficiaries; the average among physician assistant prescribers was 830. 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.