Gregory Paul Calkins, M.D.
Emergency Medicine Physician · Kamuela, HI
Gregory Paul Calkins, M.D. is an emergency medicine physician with a practice address in Kamuela, Hawaii, and NPI 1043291206, issued on Nov 7, 2005. Check the license (Hawaii MD-6251, as entered in NPPES) on the Hawaii Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory Paul Calkins
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- MD-6251 HI
G200602 CA
01031005A IN
35-043792 OH
Self-reported in NPPES; status is on the state search - Practice location
- 65-1117 Ehiku PL, Kamuela, HI 96743
- Phone
- (513) 368-3602
- Enumerated
- Nov 7, 2005
- Record last updated
- Nov 14, 2025
- Medicare enrollment
- Enrolled (PECOS I20220308001575); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 370 in Hawaii → Look up another NPI →
Verify Gregory Paul Calkins in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersHawaii Medical Board
Search for license MD-6251Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average emergency medicine physician in 2024
64 Medicare Part D claims for 44 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D.
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
- Duerler IncKamuela, HI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Paul Calkins among 370 emergency medicine physician records in Hawaii
Gregory Paul Calkins, M.D. is one of 370 emergency medicine physician records with a practice address in Hawaii. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 97% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated1978 · median 2012 among the 202 with a school on file
- Record last updated2025 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Hawaii practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in Hawaii
There are 370 emergency medicine physician records in Hawaii.
All 370 in Hawaii → Every provider in Kamuela → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Marisa Hori, M.D.Kamuela, HI 967431801195359
- Yizheng LoganKamuela, HI 967431568356533
- Sharon Lowrie, M.D.Kaneohe, HI 967441679611289
- Warren Sparks, MDKalaheo, HI 967411023045440
- Eric Wortmann, M.D.Kalaheo, HI 967411457465577
- Barbara Kelly, M.D.Kaunakakai, HI 967481134204092
- James Power, MDKaunakakai, HI 967481164409546
- Jeffrey Gerton, MDKealakekua, HI 967501689719494
Common questions
What is Gregory Paul Calkins, M.D.'s NPI number?
Gregory Paul Calkins, M.D.'s National Provider Identifier (NPI) is 1043291206, issued on Nov 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Paul Calkins, M.D. located?
The NPPES record lists a practice address at 65-1117 Ehiku PL, Kamuela, HI, 96743. Phone: (513) 368-3602. Providers update this record themselves, so call before visiting.
How can I verify Gregory Paul Calkins, M.D.'s license?
NPPES lists Hawaii license number MD-6251, 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 Gregory Paul Calkins, M.D. prescribe under Medicare Part D?
In 2024, Gregory Paul Calkins, M.D. had 64 Medicare Part D claims for 44 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.