Dr. John R. Gregory, MD
- Medicare services, 2024
- 96
- Medicare patients, 2024
- 115
- Part D claims, 2019
- 23
- Hospital affiliations
- 1
- Industry payments
- $3,244
- 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. John R. Gregory is a general surgeon in Billings, Montana
Dr. Gregory practices at Billings Clinic Hospital in Billings, Montana, part of Billings Clinic.
Dr. Gregory's NPI, 1861504847, was assigned on August 31, 2006. Dr. Gregory graduated from University of Colorado School of Medicine, Denver in 1975. Dr. Gregory holds Montana license 4284.
- NPI
- 1861504847NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709921455
- NPI enumeration date
- August 31, 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
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John R. Gregory practices at Billings Clinic Hospital in Billings, Montana
Dr. Gregory's 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. John R. Gregory is affiliated with 2 sites of care and 1 medical group
Dr. Gregory's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. The medical group on file is Billings Clinic. Dmand AI also links Dr. Gregory to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John R. Gregory's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gregory practices, 2 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 |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across Billings Clinic and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John R. Gregory is one of 111 general surgeons in Montana
Surgery is Dr. Gregory's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Gregory is licensed in Montana.
Specialties and state licenses
- Surgery, MontanaPrimary
General surgeons near Dr. Gregory
Counts of general surgeons 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. John R. Gregory billed Medicare for 96 services in 2024
CMS data shows 96 Medicare services from Dr. Gregory across 5 procedure codes in 2024, for 115 Medicare patients. Medicare paid $16,842 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gregory's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1092024: 8027%
- Surgery
- 2023: 112024: 1645%
Dr. Gregory compared with the Montana median for general surgeons, 2024
- Dr. Gregory
- Montana median
- Medicare services
- 96vs 13529% below
- Medicare patients
- 115vs 1237% below
- Part D claims
- 23vs 4245% below
Medians across 121 general surgeons in Montana with Dmand AI profiles that report each measure.
Dr. Gregory'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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John R. Gregory treated 115 Medicare patients in 2024, average age 73
CMS counts 115 Medicare patients who saw Dr. Gregory in 2024. The largest group is 65 to 74, with 59 patients. 70% of them have high blood pressure, and 57% have high cholesterol. 12% are also on Medicaid. Their average risk score is 1.35, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Gregory's median patient age at 72, with 48% women.
Dr. Gregory's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gregory's Medicare patients by sex, 2024
- Women5447%
- Men6153%
Chronic conditions among Dr. Gregory's Medicare patients, 2024
- High blood pressure70%
- High cholesterol57%
- Arthritis47%
- Cancer38%
- Mood disorders35%
- Depression34%
- COPD33%
- Ischemic heart disease27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gregory's 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
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John R. Gregory wrote 23 Medicare Part D claims in 2019
In 2019, Dr. Gregory wrote 23 Medicare Part D claims. They cover 1 drug, with $4,476 in total drug cost. In 2018, CMS named 54 claims across 4 drugs.
Dr. Gregory's 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.
Part D claims for drugs CMS names, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 542019: 2357%
Drugs named by CMS: 1 in 2019, 4 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. John R. Gregory ranks in the 29th percentile for spinal fusion in Medicare
Dr. Gregory accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 12 procedures of spinal fusion by Dr. Gregory, more than 29% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Gregory ranks in Medicare procedure volume
- Spinal fusion
- 29th percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John R. Gregory received $3,244 in industry payments from 2016 to 2024
CMS Open Payments shows 37 general payments to Dr. Gregory from 11 drug and device companies from 2016 to 2024. Travel and lodging make up the largest share, 53% of the total. Intuitive Surgical, Inc. paid the most, $1,722.
General payments to Dr. Gregory by program year, 2016 to 2024
General payments to Dr. Gregory by kind, 2016 to 2024
- Travel and lodging$1,72353%
- Food and beverage$1,47646%
- Education$451%
Companies that paid Dr. Gregory the most, 2016 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John R. Gregory graduated from University of Colorado School of Medicine, Denver
Dr. Gregory graduated from University of Colorado School of Medicine, Denver in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John R. Gregory'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) |
| 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) |
| 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. John R. Gregory
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. John R. Gregory's NPI number?
Dr. John R. Gregory's NPI number is 1861504847. It was assigned on August 31, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John R. Gregory?
Dr. John R. Gregory is a general surgeon in Billings, Montana. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. John R. Gregory practice?
Dr. Gregory practices at 2800 10th Ave N, Billings, MT 59101. Dr. Gregory's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dmand AI also links Dr. Gregory to 1 group practice or clinic.
What is Dr. John R. Gregory's office phone number?
The practice phone on file for Dr. Gregory is (406) 657-4000.
What is Dr. John R. Gregory's medical license number?
Dr. Gregory holds Montana license 4284.
Which hospitals is Dr. John R. Gregory affiliated with?
Dr. Gregory practices at Billings Clinic Hospital in Billings, Montana.
What medical group is Dr. John R. Gregory part of?
Dr. Gregory is linked to Billings Clinic.
Does Dr. John R. Gregory accept Medicare?
Yes. CMS data shows Dr. Gregory billed Medicare for 96 services in 2024, and Dr. Gregory accepts Medicare assignment.
How many Medicare patients does Dr. John R. Gregory see?
CMS counts 115 Medicare patients who saw Dr. Gregory in 2024, with an average age of 73.
What services does Dr. John R. Gregory bill to Medicare?
In 2024, Dr. Gregory's most billed Medicare services were office visit, established patient (99213), office visit, established patient (99214) and office visit, new patient (99204).
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Where did Dr. John R. Gregory go to medical school?
Dr. Gregory graduated from University of Colorado School of Medicine, Denver in 1975.
What drugs does Dr. John R. Gregory prescribe most?
In 2019 Medicare Part D data, Dr. Gregory's most prescribed drugs by claims were Neupro.
Has Dr. John R. Gregory received payments from drug or device companies?
CMS Open Payments shows $3,244 in general payments to Dr. Gregory from 11 companies from 2016 to 2024. The largest total came from Intuitive Surgical, Inc.
How long has Dr. John R. Gregory been practicing?
Dr. Gregory graduated from medical school in 1975, 51 years ago.
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