Dr. Gregory Paul Calkins, MD
- Medicare services, 2020
- 12
- Part D claims, 2024
- 64
- Industry payments
- $124
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 641032 Mamalahoa Hwy, Kamuela, HI 96743
- Practice phone
- Call (808) 769-5010
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mango Medical
Multi-specialty group site · Kamuela, Hawaii
Find Dr. Calkins' professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Gregory Paul Calkins is an emergency medicine physician in Kamuela, Hawaii
Dr. Calkins practices at Mango Medical in Kamuela, Hawaii.
Dr. Calkins' NPI, 1043291206, was assigned on November 7, 2005. Dr. Calkins holds Indiana license 01031005A.
- NPI
- 1043291206NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426077645
- NPI enumeration date
- November 7, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (808) 769-5010
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory Paul Calkins practices at Mango Medical in Kamuela, Hawaii
Dr. Calkins' primary practice is Mango Medical, at 641032 Mamalahoa Hwy, Kamuela, HI 96743. The practice phone is (808) 769-5010.
- Mango Medical641032 Mamalahoa Hwy, Kamuela, HI 96743Phone(808) 769-5010
Source: Dmand AI Affiliation Data
Dr. Gregory Paul Calkins is affiliated with 1 site of care and 1 medical group
Dr. Calkins' primary practice is Mango Medical in Kamuela, Hawaii. The medical group on file is Mango Medical.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory Paul Calkins' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Calkins practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mango Medical | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory Paul Calkins is one of 393 emergency medicine physicians in Hawaii
Emergency medicine is Dr. Calkins' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dmand AI has Dr. Calkins' licenses on file in 2 states: Indiana and Ohio.
Specialties and state licenses
- Emergency medicine, IndianaPrimary
- Ohio license
Emergency medicine physicians near Dr. Calkins
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Gregory Paul Calkins billed Medicare for 12 services in 2020
CMS data shows 12 Medicare services from Dr. Calkins across 1 procedure code in 2020. Medicare paid $613 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Calkins' Medicare services by type, 2019 to 2020
- 2019
- 2020
- Office and hospital visits
- 2019: 862020: 1286%
Dr. Calkins compared with the Hawaii median for emergency medicine physicians, 2020
- Dr. Calkins
- Hawaii median
- Medicare services
- 12vs 22995% below
- Part D claims
- 25vs 7265% below
Medians across 378 emergency medicine physicians in Hawaii with Dmand AI profiles that report each measure.
Dr. Calkins' most billed Medicare procedure codes, 2020
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Calkins?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Calkins and other emergency medicine physicians in Hawaii.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory Paul Calkins' patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Calkins' median patient age at 59, with 53% women.
Dr. Calkins' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women53%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Gregory Paul Calkins wrote 64 Medicare Part D claims in 2024
In 2024, Dr. Calkins wrote 64 Medicare Part D claims for 44 patients. 84% of them were for generic drugs. CMS names the drug for 25 of them, across 2 drugs with 11 or more claims each, at $225 in total drug cost. In 2018, CMS named 103 claims across 7 drugs.
Dr. Calkins' Part D claims by kind of drug, 2024
- Generic54 claims84%
- Brand-name and other10 claims16%
Dr. Calkins' most prescribed drugs by claims, 2019
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Calkins' Part D claims, 2024
- Antibiotics50%32 of 64 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1032019: 2576%
Drugs named by CMS: 2 in 2019, 7 in 2018.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Gregory Paul Calkins takes part in Medicare
Dr. Calkins accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gregory Paul Calkins received $124 in industry payments in 2017
CMS Open Payments shows 1 general payment to Dr. Calkins from 1 drug or device company in 2017. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $124.
Companies that paid Dr. Calkins the most, 2017 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Gregory Paul Calkins's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gregory Paul Calkins
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Gregory Paul Calkins' NPI number?
Dr. Gregory Paul Calkins' NPI number is 1043291206. It was assigned on November 7, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory Paul Calkins?
Dr. Gregory Paul Calkins is an emergency medicine physician in Kamuela, Hawaii. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Gregory Paul Calkins practice?
Dr. Calkins practices at 641032 Mamalahoa Hwy, Kamuela, HI 96743. Dr. Calkins' primary practice is Mango Medical in Kamuela, Hawaii.
What is Dr. Gregory Paul Calkins' office phone number?
The practice phone on file for Dr. Calkins is (808) 769-5010.
What is Dr. Gregory Paul Calkins' medical license number?
Dr. Calkins holds Indiana license 01031005A, one of the licenses on file in 2 states.
Which states has Dr. Gregory Paul Calkins been licensed in?
Dmand AI has state licenses on file for Dr. Calkins in Indiana and Ohio.
What medical group is Dr. Gregory Paul Calkins part of?
Dr. Calkins is linked to Mango Medical.
Does Dr. Gregory Paul Calkins accept Medicare?
Yes. CMS data shows Dr. Calkins billed Medicare for 12 services in 2020, and Dr. Calkins accepts Medicare assignment.
What services does Dr. Gregory Paul Calkins bill to Medicare?
In 2020, Dr. Calkins' most billed Medicare services were emergency department visit (99284).
What drugs does Dr. Gregory Paul Calkins prescribe most?
In 2019 Medicare Part D data, Dr. Calkins' most prescribed drugs by claims were Amoxicillin-Clavulanate Potass and Prednisone.
Has Dr. Gregory Paul Calkins received payments from drug or device companies?
CMS Open Payments shows $124 in general payments to Dr. Calkins from 1 company from 2017 to 2017. The largest total came from Pfizer Inc.
How long has Dr. Gregory Paul Calkins been practicing?
Dr. Calkins graduated from medical school in 1978, 48 years ago.
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