William Stern, M.D.
NPI 1265439475 · Gastroenterology Physician · Rockville, MD
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Stern, M.D. is a Gastroenterology Physician provider in Rockville, MD (NPI 1265439475).
Provider details
- NPI number
- 1265439475
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- D0022865 (MD)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
625 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 151 | $137 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 105 | $103 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 71 | $96 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 65 | $262 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 58 | $99 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Rabeprazole Sodium | 110 | 46 |
| Famotidine | 69 | 28 |
| Sod Picosulf/Mag Ox/Citric Acbrand: Clenpiq | 67 | 67 |
| Pantoprazole Sodium | 67 | 23 |
| Colestipol Hcl | 45 | 18 |
| Omeprazole | 36 | 21 |
| Linaclotidebrand: Linzess | 29 | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$393 across 18 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
Additional practice locations (2)
- 9420 Key West AvenueSuite 202Rockville, MD 20850-6288Phone: (301) 251-9555Fax: (301) 309-0765
- 15501 Shady Grove RoadSuite 300Rockville, MD 20850Phone: (301) 340-3252Fax: (301) 340-1423
Registry dates
- Enumerated
- 2005-07-01
- Last updated
- 2021-01-04
- Certified
- 2020-12-30
Frequently asked questions
- What is William Stern's NPI number?
- William Stern's National Provider Identifier (NPI) is 1265439475, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Stern's specialty?
- William Stern is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is William Stern located?
- William Stern's practice location on file with NPPES is 15001 Shady Grove Rd Ste 300, Rockville, MD 20850-6353.
- What is William Stern's phone number?
- The practice phone number listed in the NPPES registry for William Stern is (301) 340-3252.
- Does William Stern accept Medicare?
- William Stern is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Stern's NPI active?
- Yes — William Stern's NPI (1265439475) is active in the NPPES registry as of the last update on 2021-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.