JOHN GUNN LEE MD
Prescription History 1487734521
Internal Medicine - Gastroenterology in Orange, CA
What does Dr. Lee prescribe?
In 2024, Dr. Lee wrote 397 Medicare prescriptions for 6 medications. The most prescribed was Gavilyte-G (peg3350/sod sulf,bicarb,cl/kcl), with 156 prescriptions for 140 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. Lee prescribes.
Medications 6 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 California prescribers.
What it is used for
PEG (polyethylene glycol) with electrolyte is used to clean out the intestines before certain bowel exam procedures such as colonoscopy or barium enema X-rays.
Compared with California prescribers
Dr. Lee wrote 156 prescriptions for Gavilyte-G, about 2.3 times as often as the typical California prescriber of it (68). Medicare paid $14.64 per fill, versus $15.40 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
PEG (polyethylene glycol) with electrolyte is used to clean out the intestines before certain bowel exam procedures such as colonoscopy or barium enema X-rays.
Compared with California prescribers
Dr. Lee wrote 61 prescriptions for Peg-3350 And Electrolytes, about 1.5 times as often as the typical California prescriber of it (41). Medicare paid $15.28 per fill, versus $16.03 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
Sodium/potassium/magnesium sulfate solution is used to clean out the intestines before a certain bowel exam procedure (colonoscopy).
Compared with California prescribers
Dr. Lee wrote 60 prescriptions for Sod Sulf-Potass Sulf-Mag Sulf, about half as often as the typical California prescriber of it (102). Medicare paid $56.02 per fill, versus $62.73 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
This medication is used to treat a variety of bacterial infections.
Compared with California prescribers
Dr. Lee wrote 59 prescriptions for Ciprofloxacin Hcl, about 2 times as often as the typical California prescriber of it (30). Medicare paid $3.52 per fill, versus $6.32 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
Omeprazole is used to treat certain stomach and esophagus problems (such as acid reflux, ulcers).
Compared with California prescribers
Dr. Lee wrote 32 prescriptions for Omeprazole, about 41% as often as the typical California prescriber of it (78). Medicare paid $10.75 per fill, versus $11.26 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
PEG (polyethylene glycol) with electrolyte is used to clean out the intestines before certain bowel exam procedures such as colonoscopy or barium enema X-rays.
Compared with California prescribers
Dr. Lee wrote 29 prescriptions for Peg 3350-Electrolyte, about half as often as the typical California prescriber of it (59). Medicare paid $21.91 per fill, versus $21.31 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. Lee’s prescriptions
What does Dr. Lee prescribe most?
In 2024 Medicare Part D data, Dr. Lee's most prescribed medications were Gavilyte-G (156), Peg-3350 And Electrolytes (61) and Sod Sulf-Potass Sulf-Mag Sulf (60).
How does Dr. Lee's prescribing compare with other California prescribers?
Of the 6 medications with a state comparison, Dr. Lee prescribes 3 more often than the typical California prescriber and 3 less often. Volume reflects practice size as well as prescribing habits.
Does this list show every medication Dr. Lee 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 California 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.
