William Dierenfeldt, MD
NPI 1477591634 · Gastroenterology Physician · Manhattan, KS
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Dierenfeldt, MD is a Gastroenterology Physician provider in Manhattan, KS (NPI 1477591634).
Provider details
- NPI number
- 1477591634
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 04-28673 (KS)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
973 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 270 | $224 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 254 | $77 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 98 | $165 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 86 | $117 |
| Balloon Dilation of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope, Less Than 3.0 Cm43249 | 73 | $125 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Pantoprazole Sodium | 340 | 93 |
| Omeprazole | 140 | 31 |
| Famotidine | 25 | — |
| Budesonidebrand: Budesonide Dr | 21 | — |
| Dicyclomine Hcl | 21 | — |
| Sucralfate | 20 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 18 | 17 |
Practice location
Mailing address
Additional practice locations (1)
- 1102 Saint Marys RdJunction City, KS 66441-4139Phone: (785) 238-0325Fax: (785) 576-1113
Registry dates
- Enumerated
- 2006-06-02
- Last updated
- 2026-01-05
- Certified
- 2026-01-05
Frequently asked questions
- What is William Dierenfeldt's NPI number?
- William Dierenfeldt's National Provider Identifier (NPI) is 1477591634, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Dierenfeldt's specialty?
- William Dierenfeldt is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Dierenfeldt located?
- William Dierenfeldt's practice location on file with NPPES is 1325 Research Park Dr, Manhattan, KS 66502-5000.
- What is William Dierenfeldt's phone number?
- The practice phone number listed in the NPPES registry for William Dierenfeldt is (785) 537-2651.
- Does William Dierenfeldt accept Medicare?
- William Dierenfeldt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Dierenfeldt's NPI active?
- Yes — William Dierenfeldt's NPI (1477591634) is active in the NPPES registry as of the last update on 2026-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.