Sean Spencer, MD, PHD
NPI 1235518176 · Gastroenterology Physician · Stanford, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sean Spencer, MD, PHD is a Gastroenterology Physician provider in Stanford, CA (NPI 1235518176).
Provider details
- NPI number
- 1235518176
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- L-263354 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
203 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 53 | $193 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 33 | $194 |
| 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 | 27 | $19 |
| 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 | 23 | $6 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 21 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium Chloride/Nahco3/Kcl/Pegbrand: Peg 3350-Electrolyte | 33 | 33 |
| Esomeprazole Magnesium | 28 | — |
| Prucalopride Succinatebrand: Motegrity | 19 | — |
| Omeprazole | 19 | — |
| Plecanatidebrand: Trulance | 16 | — |
| Rifaximinbrand: Xifaxan | 12 | — |
| Diphenoxylate Hcl/Atropinebrand: Diphenoxylate-Atropine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,907 across 9 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 (1)
- Massachusetts General Hospital55 Fruit StreetBoston, MA 02114Phone: (617) 726-5820
Registry dates
- Enumerated
- 2015-05-26
- Last updated
- 2024-04-17
- Certified
- 2024-04-17
Frequently asked questions
- What is Sean Spencer's NPI number?
- Sean Spencer's National Provider Identifier (NPI) is 1235518176, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sean Spencer's specialty?
- Sean Spencer is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Sean Spencer located?
- Sean Spencer's practice location on file with NPPES is 300 Pasteur Dr, Stanford, CA 94305-2200.
- What is Sean Spencer's phone number?
- The practice phone number listed in the NPPES registry for Sean Spencer is (650) 723-4000.
- Does Sean Spencer accept Medicare?
- Sean Spencer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sean Spencer's NPI active?
- Yes — Sean Spencer's NPI (1235518176) is active in the NPPES registry as of the last update on 2024-04-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.