Review of prehospital sodium bicarbonate use for cyclic antidepressant overdose (opens in a new tab)
Emerg Med J
Allied Health PersonnelAntidepressive AgentsAntidotes
Dr. Thomas Robert Calkins, MD
NPI1720037518
- Medicare services, 2024
- 689
- Medicare patients, 2024
- 535
- Part D claims, 2024
- 314
- Publications
- 2
- Hospital affiliations
- 1
- Practice address
- 27700 Medical Center Rd, Mission Viejo, CA 92691
- Practice phone
- Call (949) 365-2447
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mission Hospital - Unit
Acute Care Hospital-Unit · Mission Viejo, California
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Dr. Thomas Robert Calkins is an emergency medicine physician in Mission Viejo, California
Dr. Calkins practices at Mission Hospital - Unit in Mission Viejo, California.
Dr. Calkins' NPI, 1720037518, was assigned on May 9, 2006. Dr. Calkins graduated from UC Irvine School of Medicine in 2000. Dr. Calkins holds California license A77312.
NPI and contact details
- NPI
- 1720037518NPI Registry (opens in a new tab)
- NPI enumeration date
- May 9, 2006
- NPI status
- Active
- Practice phone
- (949) 365-2447
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 52
- Medical school graduation
- 2000
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Thomas Robert Calkins practices at Mission Hospital - Unit in Mission Viejo, California
Dr. Calkins' primary practice is Mission Hospital - Unit, at 27700 Medical Center Rd, Mission Viejo, CA 92691 in Orange County. The practice phone is (949) 365-2447.
- Mission Hospital - Unit27700 Medical Center Rd, Mission Viejo, CA 92691 · Orange CountyPhone(949) 365-2447
Source: Dmand AI Affiliation Data
Dr. Thomas Robert Calkins is affiliated with 1 site of care and 3 medical groups
Dr. Calkins' primary practice is Mission Hospital - Unit in Mission Viejo, California. The medical group on file is Emergency Medicine Physicians. Dmand AI also links Dr. Calkins to 2 more medical groups, each named with a free account.
Mission Hospital - UnitPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Thomas Robert 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 |
|---|---|
| Mission Hospital - Unit | Available with a free account |
| +2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Thomas Robert Calkins is one of 7,423 emergency medicine physicians in California
Emergency medicine is Dr. Calkins' primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Calkins is board certified in emergency medicine by the American Board of Emergency Medicine. Dmand AI has Dr. Calkins' licenses on file in 2 states: California and Idaho.
Specialties and state licenses
- Emergency medicine, CaliforniaPrimary
- Idaho 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. Thomas Robert Calkins billed Medicare for 689 services in 2024
CMS data shows 689 Medicare services from Dr. Calkins across 4 procedure codes in 2024, for 535 Medicare patients. Medicare paid $85,091 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 2024689
Medicare patients535
Paid by Medicare$85,091
Procedure codes4
Dr. Calkins' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4332024: 54726%
- Tests and treatments
- 2023: 582024: 142145%
Dr. Calkins compared with the California median for emergency medicine physicians, 2024
- Dr. Calkins
- California median
- Medicare services
- 689vs 2652.6 times
- Medicare patients
- 535vs 2432.2 times
- Part D claims
- 166vs 622.7 times
Medians across 7,079 emergency medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Calkins' most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Calkins and other emergency medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Thomas Robert Calkins treated 535 Medicare patients in 2024, average age 79
CMS counts 535 Medicare patients who saw Dr. Calkins in 2024. The largest group is 75 to 84, with 210 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.92, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Calkins' median patient age at 53, with 57% women.
Medicare patients, 2024535
Average age79
Average risk score1.92
Also on Medicaid17%
Dr. Calkins' Medicare patients by age, 2024
Dr. Calkins' Medicare patients by sex, 2024
- Women28553%
- Men25047%
Chronic conditions among Dr. Calkins' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Ischemic heart disease42%
- Atrial fibrillation38%
- Anxiety36%
- Mood disorders36%
- Depression34%
Share of Medicare patients with each condition. A patient can have several.
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 53
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Thomas Robert Calkins wrote 314 Medicare Part D claims in 2024
In 2024, Dr. Calkins wrote 314 Medicare Part D claims for 214 patients. 94% of them were for generic drugs. CMS names the drug for 166 of them, across 8 drugs with 11 or more claims each, at $774 in total drug cost. In 2023, CMS named 79 claims across 4 drugs.
Part D claims, 2024314
Drugs named by CMS8
Total drug cost$774
Part D patients214
Dr. Calkins' Part D claims by kind of drug, 2024
- Generic295 claims94%
- Brand-name19 claims6%
Dr. Calkins' most prescribed drugs by claims, 2024
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
- Opioids12%37 of 314 claims
- Antibiotics36%112 of 314 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, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 792024: 166110%
Drugs named by CMS: 8 in 2024, 4 in 2023.
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
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Dr. Thomas Robert Calkins has 2 publications on record
Dmand AI links 2 papers to Dr. Calkins. The most frequent topics are California and Emergency Medical Services. Dr. Calkins' most frequent co-authors are Richard F. Clark, MD, Mark I. Langdorf, MD and Gary M. Vilke, MD.
Papers2
Topics Dr. Calkins writes about most
- California
- Emergency Medical Services
Dr. Calkins' most frequent co-authors
Recent publications by Dr. Calkins
Prehosp Disaster Med
CaliforniaEmergency Medical ServicesIntubation, Intratracheal
See who Dr. Calkins researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Calkins works with, so you can find a warm path to the right emergency medicine physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Thomas Robert Calkins received $191 in industry payments from 2017 to 2019
CMS Open Payments shows 4 general payments to Dr. Calkins from 3 drug and device companies from 2017 to 2019. Food and beverage make up the largest share, 100% of the total. Edwards Lifesciences Corporation paid the most, $147.
General payments to Dr. Calkins by program year, 2017 to 2019
Companies that paid Dr. Calkins the most, 2017 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Thomas Robert Calkins graduated from UC Irvine School of Medicine
Dr. Calkins graduated from UC Irvine School of Medicine in 2000.
- Medical school
- Board certified in emergency medicine
Source: Dmand AI Professional Profile Data
Dr. Thomas Robert Calkins accepts plans from 1 insurance carrier
Dr. Calkins is in network with 1 carrier, including Excellus BlueCross BlueShield. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Excellus BlueCross BlueShield
Plan types Dr. Calkins accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
- PPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Thomas Robert 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| 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. Thomas Robert 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. Thomas Robert Calkins' NPI number?
Dr. Thomas Robert Calkins' NPI number is 1720037518. It was assigned on May 9, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Thomas Robert Calkins?
Dr. Thomas Robert Calkins is an emergency medicine physician in Mission Viejo, California. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Thomas Robert Calkins practice?
Dr. Calkins practices at 27700 Medical Center Rd, Mission Viejo, CA 92691. Dr. Calkins' primary practice is Mission Hospital - Unit in Mission Viejo, California. Dmand AI also links Dr. Calkins to 2 medical groups.
What is Dr. Thomas Robert Calkins' office phone number?
The practice phone on file for Dr. Calkins is (949) 365-2447.
What is Dr. Thomas Robert Calkins' medical license number?
Dr. Calkins holds California license A77312, one of the licenses on file in 2 states.
Which states has Dr. Thomas Robert Calkins been licensed in?
Dmand AI has state licenses on file for Dr. Calkins in California (2001 to 2027) and Idaho (2025 to 2026).
What medical group is Dr. Thomas Robert Calkins part of?
Dr. Calkins is linked to Emergency Medicine Physicians. Dmand AI links Dr. Calkins to 2 more medical groups.
Does Dr. Thomas Robert Calkins accept Medicare?
Yes. CMS data shows Dr. Calkins billed Medicare for 689 services in 2024.
How many Medicare patients does Dr. Thomas Robert Calkins see?
CMS counts 535 Medicare patients who saw Dr. Calkins in 2024, with an average age of 79.
Is Dr. Thomas Robert Calkins board certified?
Yes. Dr. Calkins is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 8 more questionsShow fewer questions
What services does Dr. Thomas Robert Calkins bill to Medicare?
In 2024, Dr. Calkins' most billed Medicare services were critical care (99291), emergency department visit (99285) and heart test or procedure (93010).
Where did Dr. Thomas Robert Calkins go to medical school?
Dr. Calkins graduated from UC Irvine School of Medicine in 2000.
What drugs does Dr. Thomas Robert Calkins prescribe most?
In 2024 Medicare Part D data, Dr. Calkins' most prescribed drugs by claims were Cephalexin, Hydrocodone-Acetaminophen and Prednisone.
Has Dr. Thomas Robert Calkins received payments from drug or device companies?
CMS Open Payments shows $191 in general payments to Dr. Calkins from 3 companies from 2017 to 2019. The largest total came from Edwards Lifesciences Corporation.
How long has Dr. Thomas Robert Calkins been practicing?
Dr. Calkins graduated from medical school in 2000, 26 years ago.
Does Dr. Thomas Robert Calkins do research?
Dmand AI links 2 publications to Dr. Calkins.
Who does Dr. Thomas Robert Calkins publish with?
Dr. Calkins' most frequent co-authors are Richard F. Clark, MD (1 shared paper), Mark I. Langdorf, MD (1 shared paper) and Gary M. Vilke, MD (1 shared paper).
What insurance does Dr. Thomas Robert Calkins accept?
Dr. Calkins is in network with 1 carrier, including Excellus BlueCross BlueShield. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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