Doctor profile · Federal record
Dr. Jeremy Fields, MD
Gastroenterology Physician (CMS: Gastroenterology) · Ames, IA
- NPI 1285844142
- Accepts Medicare
- 18 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1215 Duff Avenue, McFarland Clinic. PC
Ames, IA 500103014
(515) 239-4450
fax (515) 956-4080
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- November 11, 2020
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Iowa #37948
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1285844142. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,564
Distinct HCPCS
10
Medicare allowed
$133,747
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
G0500 |
Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 485 | 439 | $5 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 223 | 222 | $232 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 97 | 77 | $85 | |
36415 |
Insertion of needle into vein for collection of blood sample | 79 | 52 | $8 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 73 | 45 | $47 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 71 | 64 | $123 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 60 | 58 | $80 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 54 | 33 | $8 | |
80053 |
Blood test, comprehensive group of blood chemicals | 53 | 32 | $10 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 53 | 51 | $121 |
In context: peer comparison
Among 1 peers in Ames Gastroenterology Physician, average services per provider: 71. This provider delivers 22× the peer median.Open Payments
Industry payments received
All-time total
$64
Transactions
4
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbvie INC. | 2 | $52.10 | |
| Micro-Tech Endoscopy USA, INC. | 2 | $11.57 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
1,162
Patients
475
Total drug cost
$142,764
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 306 | 68 | $4,148 |
| Sod Sulf-Potass Sulf-Mag Sulf (Sodium, Potassium,Mag Sulfates) | Brand | 228 | 219 | $19,096 |
| Pantoprazole Sodium | Generic | 82 | 19 | $1,895 |
| Mesalamine | Generic | 71 | 14 | $61,341 |
| Balsalazide Disodium | Generic | 67 | 13 | $8,784 |
| Clenpiq (Sod Picosulf/Mag Ox/Citric Ac) | Brand | 62 | 62 | $11,030 |
| Colestipol Hcl | Generic | 62 | 14 | $8,973 |
| Azathioprine | Generic | 56 | 0 | $2,903 |
| Ursodiol | Generic | 38 | 0 | $8,531 |
| Gavilyte-G (Peg3350/Sod Sulf,Bicarb,Cl/Kcl) | Brand | 35 | 34 | $655 |
Hospital affiliations
Frequently asked questions
What is Dr. Jeremy Fields's medical specialty?
Dr. Jeremy Fields practices Gastroenterology Physician in Ames, IA.
Where does Dr. Jeremy Fields practice?
Dr. Jeremy Fields practices at 1215 Duff Avenue, Ames, IA 500103014. Office phone: 5152394450.
What is Dr. Jeremy Fields's NPI?
Dr. Jeremy Fields's National Provider Identifier (NPI) is 1285844142, issued by NPPES.
Does Dr. Jeremy Fields accept Medicare assignment?
Yes. Dr. Jeremy Fields accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Jeremy Fields commonly perform?
Top Medicare-reported procedures in 2023: Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (HCPCS G0500); Removal of polyps or growths of large bowel using an endoscope with mechanical snare (HCPCS 45385); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.