DR. FREDERICK O'NEAL GREGG D.O.
Prescription History 1952523607
Orthopaedic Surgery in Hattiesburg, MS
What does Dr. Gregg prescribe?
In 2024, Dr. Gregg wrote 1,244 Medicare prescriptions for 15 medications. The most prescribed was Meloxicam, with 565 prescriptions for 250 patients.
Medicare Part D only. These are prescriptions filled by people with Medicare drug coverage in 2024, from the CMS data released in 2026, the most recent year available. CMS does not publish medications with fewer than 11 prescriptions, so this is not a full list of what Dr. Gregg prescribes.
Medications 15 medications
Prescriptions filled under Medicare Part D in 2024. Select a medication to see what it is used for and how it compares with other Mississippi prescribers.
What it is used for
Meloxicam is used to treat arthritis.
Compared with Mississippi prescribers
Dr. Gregg wrote 565 prescriptions for Meloxicam, about 7 times as often as the typical Mississippi prescriber of it (81). Medicare paid $2.79 per fill, versus $3.73 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Mississippi prescribers
Dr. Gregg wrote 219 prescriptions for Tramadol Hcl, about 3.7 times as often as the typical Mississippi prescriber of it (60). Medicare paid $2.14 per fill, versus $5.29 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to help relieve moderate to severe pain.
Compared with Mississippi prescribers
Dr. Gregg wrote 83 prescriptions for Oxycodone Hcl, about as often as the typical Mississippi prescriber of it (81). Medicare paid $3.77 per fill, versus $18.02 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is a nonsteroidal anti-inflammatory drug (NSAID), specifically a COX-2 inhibitor, which relieves pain and swelling (inflammation).
Compared with Mississippi prescribers
Dr. Gregg wrote 55 prescriptions for Celecoxib, about 1.2 times as often as the typical Mississippi prescriber of it (44). Medicare paid $24.03 per fill, versus $21.34 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
See also Warning section.
Compared with Mississippi prescribers
Dr. Gregg wrote 55 prescriptions for Diclofenac Sodium, about as often as the typical Mississippi prescriber of it (52). Medicare paid $23.64 per fill, versus $19.72 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Gabapentin is used with other medications to prevent and control seizures.
Compared with Mississippi prescribers
Dr. Gregg wrote 50 prescriptions for Gabapentin, about 37% as often as the typical Mississippi prescriber of it (136). Medicare paid $4.01 per fill, versus $12.25 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to relieve moderate to severe pain.
Compared with Mississippi prescribers
Dr. Gregg wrote 50 prescriptions for Hydrocodone-Acetaminophen, about half as often as the typical Mississippi prescriber of it (116). Medicare paid $5.02 per fill, versus $15.96 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Famotidine is used to treat ulcers of the stomach and intestines and to prevent intestinal ulcers from coming back after they have healed.
Compared with Mississippi prescribers
Dr. Gregg wrote 31 prescriptions for Famotidine, about 38% as often as the typical Mississippi prescriber of it (82). Medicare paid $0.44 per fill, versus $9.86 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a wide variety of bacterial infections.
Compared with Mississippi prescribers
Dr. Gregg wrote 26 prescriptions for Cephalexin, about 83% as often as the typical Mississippi prescriber of it (31). Medicare paid $2.81 per fill, versus $5.89 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with Mississippi prescribers
Dr. Gregg wrote 26 prescriptions for Ondansetron Hcl, about 76% as often as the typical Mississippi prescriber of it (34). Medicare paid $3.28 per fill, versus $9.53 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used alone or with other medications to prevent nausea and vomiting caused by cancer drug treatment (chemotherapy) and radiation therapy.
Compared with Mississippi prescribers
Dr. Gregg wrote 25 prescriptions for Ondansetron Odt, about 81% as often as the typical Mississippi prescriber of it (31). Medicare paid $9.39 per fill, versus $11.96 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat a variety of bacterial infections.
Compared with Mississippi prescribers
Dr. Gregg wrote 22 prescriptions for Ciprofloxacin Hcl, about 70% as often as the typical Mississippi prescriber of it (32). Medicare paid $22.43 per fill, versus $6.27 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
Amoxicillin is used to treat a wide variety of bacterial infections.
Compared with Mississippi prescribers
Dr. Gregg wrote 15 prescriptions for Amoxicillin, about 37% as often as the typical Mississippi prescriber of it (41). Medicare paid $0.75 per fill, versus $2.99 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This medication is used to treat certain conditions of the stomach and intestines.
Compared with Mississippi prescribers
Dr. Gregg wrote 11 prescriptions for Metoclopramide Hcl, about 37% as often as the typical Mississippi prescriber of it (29). Medicare paid $0.45 per fill, versus $8.32 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
What it is used for
This combination medication is used to help relieve moderate to severe pain.
Compared with Mississippi prescribers
Dr. Gregg wrote 11 prescriptions for Oxycodone-Acetaminophen, about 10% as often as the typical Mississippi prescriber of it (113). Medicare paid $3.85 per fill, versus $25.61 statewide.
Volume reflects how many Medicare patients a practice sees as well as prescribing habits. It is not a measure of quality.
Questions about Dr. Gregg’s prescriptions
What does Dr. Gregg prescribe most?
In 2024 Medicare Part D data, Dr. Gregg's most prescribed medications were Meloxicam (565), Tramadol Hcl (219) and Oxycodone Hcl (83).
How does Dr. Gregg's prescribing compare with other Mississippi prescribers?
Of the 15 medications with a state comparison, Dr. Gregg prescribes 2 more often than the typical Mississippi prescriber, 6 about as often and 7 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Gregg prescribes?
No. It covers prescriptions filled by people with Medicare Part D drug coverage in 2024, and CMS leaves out any medication with fewer than 11 prescriptions.
About this data
This page shows one provider’s slice of public Medicare files. NPI Profile does not receive prescriptions or patient records.
| Source | What it provides here | Data year |
|---|---|---|
| CMS Medicare Part D Prescribers by Provider and Drug | Each medication, prescriptions, patients, 30-day fills, days of medication and cost. State comparisons average the Mississippi prescribers of the same medication and form, where at least five wrote it. | 2024 (released 2026, the most recent available) |
| CMS Medicare Part D Drug Spending Dashboard | What each medication is used for. | 2024 |
- Only prescriptions filled by people with Medicare Part D drug coverage are counted. Private insurance, Medicaid and cash purchases are not.
- CMS leaves out medications with fewer than 11 prescriptions and hides patient counts under 11.
- Cost per fill is what the plan and the patient paid the pharmacy together, not what you pay at the counter.
- Medication descriptions are summaries from CMS. They are not medical advice; ask a health care professional about any medication.
