Dr. Gay J. Canaris, MD
- Medicare services, 2024
- 767
- Medicare patients, 2024
- 409
- Part D claims, 2024
- 3,458
- Hospital affiliations
- 3
- Medical group
- 1
- Practice address
- 2800 10th Ave N, Billings, MT 59101
- Practice phone
- Call (406) 657-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Gay J. Canaris is an internist in Billings, Montana
Dr. Canaris practices at Billings Clinic Hospital in Billings, Montana, part of Billings Clinic.
Dr. Canaris' NPI, 1851358147, was assigned on April 28, 2006. Dr. Canaris graduated from Southwest School of Medicine and Hospital in 1987. Dr. Canaris holds Nebraska license 20200.
- NPI
- 1851358147NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7719029180
- NPI enumeration date
- April 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 657-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gay J. Canaris practices at Billings Clinic Hospital in Billings, Montana
Dr. Canaris' primary practice is Billings Clinic Hospital, at 2800 10th Ave N, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 657-4000.
- Billings Clinic Hospital2800 10th Ave N, Billings, MT 59101 · Yellowstone CountyPhone(406) 657-4000
Source: Dmand AI Affiliation Data
Dr. Gay J. Canaris is affiliated with 4 sites of care and 1 medical group
Dr. Canaris' primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dr. Canaris is also affiliated with Sheridan Memorial Hospital. The medical group on file is Billings Clinic. Dmand AI also links Dr. Canaris to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gay J. Canaris' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Canaris practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Billings Clinic Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gay J. Canaris is one of 311 internists in Montana
Internal medicine is Dr. Canaris' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Canaris is licensed in Nebraska.
Specialties and state licenses
- Internal medicine, NebraskaPrimary
Internists near Dr. Canaris
Counts of internists 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. Gay J. Canaris billed Medicare for 767 services in 2024
CMS data shows 767 Medicare services from Dr. Canaris across 5 procedure codes in 2024, for 409 Medicare patients. Medicare paid $27,001 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Canaris' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4902024: 5114%
- Other services
- 2023: 02024: 256
Dr. Canaris compared with the Montana median for internists, 2024
- Dr. Canaris
- Montana median
- Medicare services
- 767vs 47661% above
- Medicare patients
- 409vs 25362% above
- Part D claims
- 2,911vs 14320.4 times
Medians across 340 internists in Montana with Dmand AI profiles that report each measure.
Dr. Canaris' 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. Canaris and other internists in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gay J. Canaris treated 409 Medicare patients in 2024, average age 74
CMS counts 409 Medicare patients who saw Dr. Canaris in 2024. The largest group is 65 to 74, with 188 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 13% are also on Medicaid. Their average risk score is 1.15, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Canaris' median patient age at 72, with 65% women.
Dr. Canaris' Medicare patients by age, 2024
Dr. Canaris' Medicare patients by sex, 2024
- Women28068%
- Men12932%
Chronic conditions among Dr. Canaris' Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis46%
- Mood disorders33%
- Anxiety30%
- Depression30%
- Diabetes29%
- Chronic kidney disease23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Canaris' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women65%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gay J. Canaris wrote 3,458 Medicare Part D claims in 2024
In 2024, Dr. Canaris wrote 3,458 Medicare Part D claims for 302 patients. 89% of them were for generic drugs. CMS names the drug for 2,911 of them, across 65 drugs with 11 or more claims each, at $118,769 in total drug cost. In 2023, CMS named 2,644 claims across 61 drugs.
Dr. Canaris' Part D claims by kind of drug, 2024
- Generic3,069 claims89%
- Brand-name372 claims11%
- Other17 claims0%
Dr. Canaris' 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. Canaris' Part D claims, 2024
- Opioids1%45 of 3,458 claims
- Antibiotics2%53 of 3,458 claims
- Antipsychotics, patients 65 and over0%11 of 3,458 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: 2,6442024: 2,91110%
Drugs named by CMS: 65 in 2024, 61 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
How Dr. Gay J. Canaris takes part in Medicare
Dr. Canaris 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. Gay J. Canaris graduated from Southwest School of Medicine and Hospital
Dr. Canaris graduated from Southwest School of Medicine and Hospital in 1987.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gay J. Canaris'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 DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Gay J. Canaris
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. Gay J. Canaris' NPI number?
Dr. Gay J. Canaris' NPI number is 1851358147. It was assigned on April 28, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gay J. Canaris?
Dr. Gay J. Canaris is an internist in Billings, Montana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gay J. Canaris practice?
Dr. Canaris practices at 2800 10th Ave N, Billings, MT 59101. Dr. Canaris' primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dmand AI also links Dr. Canaris to 1 hospital and 1 group practice or clinic.
What is Dr. Gay J. Canaris' office phone number?
The practice phone on file for Dr. Canaris is (406) 657-4000.
What is Dr. Gay J. Canaris' medical license number?
Dr. Canaris holds Nebraska license 20200.
Which hospitals is Dr. Gay J. Canaris affiliated with?
Dr. Canaris practices at Billings Clinic Hospital in Billings, Montana. Dr. Canaris is also affiliated with Sheridan Memorial Hospital. Dmand AI links Dr. Canaris to 1 more hospital.
What medical group is Dr. Gay J. Canaris part of?
Dr. Canaris is linked to Billings Clinic.
Does Dr. Gay J. Canaris accept Medicare?
Yes. CMS data shows Dr. Canaris billed Medicare for 767 services in 2024, and Dr. Canaris accepts Medicare assignment.
How many Medicare patients does Dr. Gay J. Canaris see?
CMS counts 409 Medicare patients who saw Dr. Canaris in 2024, with an average age of 74.
What services does Dr. Gay J. Canaris bill to Medicare?
In 2024, Dr. Canaris' most billed Medicare services were office visit, established patient (99214), medicare service (G2211) and office visit, established patient (99215).
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Where did Dr. Gay J. Canaris go to medical school?
Dr. Canaris graduated from Southwest School of Medicine and Hospital in 1987.
What drugs does Dr. Gay J. Canaris prescribe most?
In 2024 Medicare Part D data, Dr. Canaris' most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Levothyroxine Sodium.
How long has Dr. Gay J. Canaris been practicing?
Dr. Canaris graduated from medical school in 1987, 39 years ago.
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