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Edit this profileAt a glance
- 801 N 29Th St, Billings, MT 59101
About Dr. 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 specializing in surgery. Medicare claims data shows John provided 96 services to 90 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and new patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more. NPI 1861504847 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (406) 238-2500
- Email not available
Practice Locations
801 N 29TH ST
Billings, MT 59101
Conditions Commonly Evaluated or Treated
Within General Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Anorectal
Appendix, bowel, and emergency
Gallbladder and biliary
Hernia and abdominal wall
Skin and soft tissue
Abdominal
Abdominal wall
Breast
Colorectal
Digestive
- Acid reflux
- Acute pancreatitis
- Bleeding Stomach Ulcer
- Bowel Fistula
- Gastroparesis
- Swallowing difficulties
Emergency surgery
Endocrine
Gastrointestinal
Hernia
Infections
Lymphatic
Oncology
Procedures & services
Most searched procedures
Bowel and emergency abdominal
- Colon resection
- Exploratory laparoscopy
- Exploratory laparotomy
- Repair of perforated peptic ulcer
- Small-bowel resection
- Surgery for bowel obstruction
- Surgical drainage of abdominal abscess
- Surgical lysis of adhesions
Gallbladder and appendix
Hernia repair
Skin and soft tissue
Abdominal surgery
Abdominal wall
Access and nutrition
Anorectal
- Anal fistula surgery
- Drainage of anal abscess
- Hemorrhoid removal
- Rubber-band ligation of hemorrhoids
- Surgery for chronic anal fissure
Biopsy
Breast surgery
- Axillary lymph-node dissection
- Excisional biopsy of a breast mass
- Mastectomy
- Sentinel lymph-node biopsy
Breast Surgery
Colorectal
Colorectal surgery
Digestive procedures
Endocrine surgery
Gastrointestinal
Hernia surgery
Skin & Soft Tissue
Surgical Oncology
Surgical procedures
Vascular Access
Wound care
Procedures Most Often Billed to Medicare
96 services · 90 patients · 5 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Fusion of lower spine bone through abdomen with partial removal of disc | Procedure | 22558 |
16 | Less often than most peers in General Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
29 | As often as other peers in General Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
20 | Less often than most peers in General Surgery |
| 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 | Less often than most peers in General Surgery |
| 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 | Less often than most peers in General Surgery |
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 — 16 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 2
Providers in MT who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Gregory?
Dr. Gregory is a general surgeon in Billings, MT. That is the designation recorded for this NPI in the federal registry, where it is listed 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. Contact the office directly to confirm availability and scheduling.
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.
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