William Peterson, M.D.
NPI 1174623854 · Gastroenterology Physician · Springfield, IL
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Peterson, M.D. is a Gastroenterology Physician provider in Springfield, IL (NPI 1174623854).
Provider details
- NPI number
- 1174623854
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036-082538 (IL)
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
1,706 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 253 | $16 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 247 | $123 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 242 | $78 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 232 | $8 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 128 | $249 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 929 | 270 |
| Famotidine | 620 | 209 |
| Omeprazole | 335 | 103 |
| Mesalamine | 226 | 52 |
| Dicyclomine Hcl | 181 | 63 |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine | 156 | 51 |
| Mesalaminebrand: Mesalamine Er | 136 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,439 across 49 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
- 2006-09-23
- Last updated
- 2020-05-21
- Certified
- 2020-05-21
Frequently asked questions
- What is William Peterson's NPI number?
- William Peterson's National Provider Identifier (NPI) is 1174623854, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Peterson's specialty?
- William Peterson is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Peterson located?
- William Peterson's practice location on file with NPPES is 1025 S 6th St, Springfield, IL 62703-2403.
- What is William Peterson's phone number?
- The practice phone number listed in the NPPES registry for William Peterson is (217) 528-7541.
- Does William Peterson accept Medicare?
- William Peterson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Peterson's NPI active?
- Yes — William Peterson's NPI (1174623854) is active in the NPPES registry as of the last update on 2020-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.