Dr. Douglas M. Guy, MD
- Medicare services, 2024
- 1,652
- Medicare patients, 2024
- 827
- Part D claims, 2024
- 1,486
- Hospital affiliations
- 5
- Industry payments
- $1,680
- Practice address
- 1233 N 30th St, Billings, MT 59101
- Practice phone
- Call (406) 237-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Healthcare
Billings, Montana
Find Dr. Guy's 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. Douglas M. Guy is a cardiologist in Billings, Montana
Dr. Guy practices at St Vincent Healthcare in Billings, Montana.
Dr. Guy's NPI, 1508827692, was assigned on March 29, 2006. Dr. Guy graduated from UNMC in 1984. Dr. Guy holds Nebraska license 16729.
- NPI
- 1508827692NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830094135
- NPI enumeration date
- March 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 237-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 68
- Medical school graduation
- 1984
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Douglas M. Guy practices at St Vincent Healthcare in Billings, Montana
Dr. Guy's primary practice is St Vincent Healthcare, at 1233 N 30th St, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 237-7000.
- St Vincent Healthcare1233 N 30th St, Billings, MT 59101 · Yellowstone CountyPhone(406) 237-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Douglas M. Guy is affiliated with 10 sites of care and 7 medical groups
Dr. Guy's primary practice is St Vincent Healthcare in Billings, Montana. Dr. Guy is also affiliated with St. Vincent Regional Hospital. The medical group on file is SCL Health Medical Group. Dmand AI also links Dr. Guy to 4 more hospitals, 6 medical groups and 4 group practices and clinics, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Douglas M. Guy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guy practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Healthcare | Available with a free account |
| +9 more sites and 6 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Douglas M. Guy is one of 81 cardiologists in Montana
Cardiovascular disease is Dr. Guy's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Guy is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Guy's licenses on file in 4 states: Nebraska, Iowa, Montana and Arkansas.
Specialties and state licenses
- Cardiovascular disease, NebraskaPrimary
- Iowa license
- Montana license
- Arkansas license
Clinical focus
Dmand AI lists aneurysm, atrial fibrillation and flutter, cardiomyopathy, chronic hypertension, coronary artery disease, heart blockage, heart failure and heart valve disorders among the conditions Dr. Guy treats.
Cardiologists near Dr. Guy
Counts of cardiologists 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. Douglas M. Guy billed Medicare for 1,652 services in 2024
CMS data shows 1,652 Medicare services from Dr. Guy across 21 procedure codes in 2024, for 827 Medicare patients. Medicare paid $92,072 for them.
Dr. Guy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7202024: 84117%
- Tests and treatments
- 2023: 5082024: 70038%
- Imaging
- 2023: 452024: 6340%
- Surgery
- 2023: 532024: 489%
Where Dr. Guy's Medicare services took place, 2024
- In an office41525%
- In a facility1,23775%
Dr. Guy compared with the Montana median for cardiologists, 2024
- Dr. Guy
- Montana median
- Medicare services
- 1,652vs 1,08353% above
- Medicare patients
- 827vs 73213% above
- Part D claims
- 1,248vs 1,1776% above
Medians across 82 cardiologists in Montana with Dmand AI profiles that report each measure.
Dr. Guy's 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.
Need commercial claims for Dr. Guy?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Guy and other cardiologists in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Douglas M. Guy treated 827 Medicare patients in 2024, average age 77
CMS counts 827 Medicare patients who saw Dr. Guy in 2024. The largest group is 75 to 84, with 324 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.68, 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. Guy's median patient age at 74, with 51% women.
Dr. Guy's Medicare patients by age, 2024
Dr. Guy's Medicare patients by sex, 2024
- Women37746%
- Men45054%
Chronic conditions among Dr. Guy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease57%
- Arthritis52%
- Atrial fibrillation48%
- Heart failure45%
- Chronic kidney disease44%
- Diabetes41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Guy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Douglas M. Guy wrote 1,486 Medicare Part D claims in 2024
In 2024, Dr. Guy wrote 1,486 Medicare Part D claims for 250 patients. 87% of them were for generic drugs. CMS names the drug for 1,248 of them, across 31 drugs with 11 or more claims each, at $191,037 in total drug cost. In 2023, CMS named 738 claims across 27 drugs.
Dr. Guy's Part D claims by kind of drug, 2024
- Generic1,288 claims87%
- Brand-name198 claims13%
Dr. Guy's 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. Guy's Part D claims, 2024
- Antibiotics1%14 of 1,486 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: 7382024: 1,24869%
Drugs named by CMS: 31 in 2024, 27 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. Douglas M. Guy takes part in Medicare
Dr. Guy accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Pacemaker insertion or repair: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Douglas M. Guy received $1,680 in industry payments from 2018 to 2025
CMS Open Payments shows 13 general payments to Dr. Guy from 5 drug and device companies from 2018 to 2025. Travel and lodging make up the largest share, 81% of the total. Medtronic, Inc. paid the most, $1,493.
General payments to Dr. Guy by program year, 2018 to 2025
General payments to Dr. Guy by kind, 2018 to 2025
- Travel and lodging$1,35681%
- Food and beverage$22513%
- Education$996%
Companies that paid Dr. Guy the most, 2018 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Douglas M. Guy has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Guy.
Awards and honors for Dr. Guy
- Undated
- ACC Fellow
- Fellow
Source: Dmand AI Professional Profile Data
Dr. Douglas M. Guy graduated from UNMC
Dr. Guy graduated from UNMC in 1984. Dr. Guy is a member of ACC and SCAI.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Douglas M. Guy accepts plans from 17 insurance carriers
Dr. Guy is in network with 17 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- HCSC
- Medica
- Alliant Health Plans
- Aspirus Health Plan
- +9 more carriersWith a free account
Plan types Dr. Guy accepts, by number of carriers
- PPO13
- HMO9
- Medicare8
- POS5
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Douglas M. Guy'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand 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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Douglas M. Guy
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. Douglas M. Guy's NPI number?
Dr. Douglas M. Guy's NPI number is 1508827692. It was assigned on March 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Douglas M. Guy?
Dr. Douglas M. Guy is a cardiologist in Billings, Montana. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Douglas M. Guy practice?
Dr. Guy practices at 1233 N 30th St, Billings, MT 59101. Dr. Guy's primary practice is St Vincent Healthcare in Billings, Montana. Dmand AI also links Dr. Guy to 4 hospitals, 6 medical groups and 4 group practices and clinics.
What is Dr. Douglas M. Guy's office phone number?
The practice phone on file for Dr. Guy is (406) 237-7000.
What is Dr. Douglas M. Guy's medical license number?
Dr. Guy holds Nebraska license 16729, one of the licenses on file in 4 states.
Which states has Dr. Douglas M. Guy been licensed in?
Dmand AI has state licenses on file for Dr. Guy in Nebraska (1984 to 2026), Iowa (1991 to 2026), Montana (2020 to 2026) and Arkansas (2002 to 2003).
Which hospitals is Dr. Douglas M. Guy affiliated with?
Dr. Guy is affiliated with St. Vincent Regional Hospital. Dmand AI links Dr. Guy to 4 more hospitals.
What medical group is Dr. Douglas M. Guy part of?
Dr. Guy is linked to SCL Health Medical Group. Dmand AI links Dr. Guy to 6 more medical groups.
Does Dr. Douglas M. Guy accept Medicare?
Yes. CMS data shows Dr. Guy billed Medicare for 1,652 services in 2024, and Dr. Guy accepts Medicare assignment.
How many Medicare patients does Dr. Douglas M. Guy see?
CMS counts 827 Medicare patients who saw Dr. Guy in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
Is Dr. Douglas M. Guy board certified?
Yes. Dr. Guy is board certified in cardiovascular disease by the American Board of Internal Medicine.
What services does Dr. Douglas M. Guy bill to Medicare?
In 2024, Dr. Guy's most billed Medicare services were hospital inpatient care (99232), heart test or procedure (93306) and office visit, established patient (99214).
Where did Dr. Douglas M. Guy go to medical school?
Dr. Guy graduated from UNMC in 1984.
What drugs does Dr. Douglas M. Guy prescribe most?
In 2024 Medicare Part D data, Dr. Guy's most prescribed drugs by claims were Metoprolol Succinate, Eliquis and Amlodipine Besylate.
Has Dr. Douglas M. Guy received payments from drug or device companies?
CMS Open Payments shows $1,680 in general payments to Dr. Guy from 5 companies from 2018 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Douglas M. Guy been practicing?
Dr. Guy graduated from medical school in 1984, 42 years ago.
What insurance does Dr. Douglas M. Guy accept?
Dr. Guy is in network with 17 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 13. Check the plan with the practice before a visit.
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