Jeremy Fields, MD
NPI 1285844142 · Gastroenterology Physician · Ames, IA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jeremy Fields, MD is a Gastroenterology Physician provider in Ames, IA (NPI 1285844142).
Provider details
- NPI number
- 1285844142
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 37948 (IA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,866 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| 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 MonitoG0500 | 597 | $5 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 278 | $221 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 97 | $118 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 90 | $9 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 66 | $165 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 400 | 390 |
| Omeprazole | 271 | 64 |
| Balsalazide Disodium | 81 | 15 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 81 | 79 |
| Colestipol Hcl | 71 | 17 |
| Mesalamine | 63 | 17 |
| Budesonidebrand: Budesonide Dr | 54 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$64 across 4 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-22
- Last updated
- 2020-11-11
- Certified
- 2020-11-11
Frequently asked questions
- What is Jeremy Fields's NPI number?
- Jeremy Fields's National Provider Identifier (NPI) is 1285844142, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jeremy Fields's specialty?
- Jeremy Fields is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Jeremy Fields located?
- Jeremy Fields's practice location on file with NPPES is 1215 Duff Avenue, Ames, IA 50010-3014.
- What is Jeremy Fields's phone number?
- The practice phone number listed in the NPPES registry for Jeremy Fields is (515) 239-4450.
- Does Jeremy Fields accept Medicare?
- Jeremy Fields is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jeremy Fields's NPI active?
- Yes — Jeremy Fields's NPI (1285844142) is active in the NPPES registry as of the last update on 2020-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.