Doctor profile · Federal record
Dr. Mark Fleisher
Gastroenterology Physician (CMS: Gastroenterology) · Jacksonville, FL
- NPI 1134125891
- Accepts Medicare
- MIPS 77.2 / 100 · 2023
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
836 Prudential Dr, Suite 801
Jacksonville, FL 322078334
(904) 288-0433
fax (904) 288-8996 - Mailing address
-
4800 Belfort RD
Jacksonville, FL 322566004
Credentials & registration
- NPI registered
- June 2005 — 21 yrs on file
- Profile last updated
- May 23, 2011
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Florida #ME 0076032
- Medicaid
- FL #257218400
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1134125891. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
787
Distinct HCPCS
10
Medicare allowed
$104,233
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 210 | 128 | $126 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 190 | 134 | $89 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 106 | 97 | $116 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 78 | 78 | $181 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 48 | 27 | $176 | |
G0105 |
Colorectal cancer screening; colonoscopy on individual at high risk | 35 | 35 | $183 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 34 | 34 | $107 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 24 | 24 | $167 | |
45378 |
Diagnostic exam of large bowel using a flexible endoscope | 18 | 18 | $187 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 16 | 15 | $257 |
In context: peer comparison
Among 44 peers in Jacksonville Gastroenterology Physician, average services per provider: 115. This provider delivers 6.8× the peer median.Open Payments
Industry payments received
All-time total
$878
Transactions
38
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 7 | $159.00 | |
| Aimmune Therapeutics, INC. | 6 | $134.86 | |
| Genzyme Corporation | 5 | $98.85 | |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | 4 | $80.49 | |
| Janssen Biotech, INC. | 3 | $68.34 | |
| Ardelyx, INC. | 2 | $48.86 | |
| Ironwood Pharmaceuticals, INC | 2 | $44.88 | |
| Celgene Corporation | 2 | $41.87 | |
| Madrigal Pharmaceuticals | 1 | $31.90 | |
| Phathom Pharmaceuticals, INC. | 1 | $28.43 | |
| Alnylam Pharmaceuticals INC. | 1 | $25.76 | |
| Lilly USA, LLC | 1 | $25.12 | |
| Gilead Sciences, INC. | 1 | $25.03 | |
| Ipsen Biopharmaceuticals, INC | 1 | $24.79 | |
| Teva Pharmaceuticals USA, INC. | 1 | $23.84 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,395
Patients
574
Total drug cost
$1,053,209
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 635 | 282 | $20,679 |
| Dicyclomine Hcl | Generic | 239 | 91 | $6,993 |
| Omeprazole | Generic | 143 | 50 | $3,895 |
| Famotidine | Generic | 81 | 38 | $2,780 |
| Linzess (Linaclotide) | Brand | 62 | 29 | $79,157 |
| Colesevelam Hcl | Generic | 40 | 14 | $5,862 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 32 | 30 | $441 |
| Lubiprostone | Generic | 27 | 0 | $13,399 |
| Mesalamine | Generic | 25 | 0 | $8,660 |
| Metronidazole | Generic | 23 | 20 | $624 |
Hospital affiliations
Frequently asked questions
What is Dr. Mark Fleisher's medical specialty?
Dr. Mark Fleisher practices Gastroenterology Physician in Jacksonville, FL.
Where does Dr. Mark Fleisher practice?
Dr. Mark Fleisher practices at 836 Prudential Dr, Jacksonville, FL 322078334. Office phone: 9042880433.
What is Dr. Mark Fleisher's NPI?
Dr. Mark Fleisher's National Provider Identifier (NPI) is 1134125891, issued by NPPES.
Does Dr. Mark Fleisher accept Medicare assignment?
Yes. Dr. Mark Fleisher accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Fleisher commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (HCPCS 43239). Source: CMS Medicare Physician & Other Practitioners file.