Physician Profile
Unclaimed ProfileAbout GREGORY
Based in Billings, MT, John R. Gregory, MD is listed in the NPI registry under general surgery. John graduated from University of Colorado School of Medicine, Denver in 1975. John is also listed as specialising in surgery.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. Gregory?
Dr. Gregory is a general surgeon in Billings, MT. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “GENERAL SURGERY”.
NPI registry
What is Dr. Gregory's address?
Dr. Gregory is listed at 801 N 29TH ST, Billings, MT 59101. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Gregory?
The number on file is (406) 238-2500. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Dr. Gregory?
Dr. Gregory's National Provider Identifier is 1861504847. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Gregory train?
Dr. Gregory attended University of Colorado School of Medicine, Denver, graduating in 1975. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Gregory have?
Dr. Gregory has 51 years experience. Calculated from a graduation year of 1975, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Gregory perform?
According to Medicare billing data, Dr. Gregory performs procedures including fusion of lower spine bone through abdomen with partial removal of disc, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Gregory's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Gregory. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (406) 238-2500
- Email not available
Practice Locations
801 N 29TH ST
Billings, MT 59101
Procedures Most Often Billed to Medicare
96 services · 90 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Fusion of lower spine bone through abdomen with partial removal of disc | Procedure | 22558 |
16 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
29 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
20 |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
19 |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
12 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other general surgeons at this location 1
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other general surgeons in Billings 7
Same specialty, same city.
More connections — 21 related providers in 3 groups
Trained at University of Colorado School of Medicine, Denver 8
Other providers in the same specialty who trained at the same institution.
Class of 1975 at University of Colorado School of Medicine, Denver 6
Providers who graduated from the same medical school in the same year.
Also performs Fusion of lower spine bone through abdomen with partial removal of disc 7
Providers in MT who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.