Ghassan Alzayer, MD
NPI 1396144804 · Gastroenterology Physician · Washington, DC
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ghassan Alzayer, MD is a Gastroenterology Physician provider in Washington, DC (NPI 1396144804).
Provider details
- NPI number
- 1396144804
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
12 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
461 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) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 101 | $147 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 83 | $146 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 66 | $113 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 45 | $191 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 40 | $154 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 121 | 46 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 74 | 67 |
| Pantoprazole Sodium | 58 | 29 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 29 | 26 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 17 | 16 |
| Lansoprazole | 12 | — |
| Metronidazole |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$171 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
Additional practice locations (1)
- 3800 Reservoir Rd NwWashington, DC 20007Phone: (202) 444-2000
Registry dates
- Enumerated
- 2014-08-20
- Last updated
- 2022-11-09
- Certified
- 2022-11-09
Frequently asked questions
- What is Ghassan Alzayer's NPI number?
- Ghassan Alzayer's National Provider Identifier (NPI) is 1396144804, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ghassan Alzayer's specialty?
- Ghassan Alzayer is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Ghassan Alzayer located?
- Ghassan Alzayer's practice location on file with NPPES is 110 Irving St Nw Ste 205, Washington, DC 20010-3017.
- What is Ghassan Alzayer's phone number?
- The practice phone number listed in the NPPES registry for Ghassan Alzayer is (202) 877-7108.
- Does Ghassan Alzayer accept Medicare?
- Ghassan Alzayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ghassan Alzayer's NPI active?
- Yes — Ghassan Alzayer's NPI (1396144804) is active in the NPPES registry as of the last update on 2022-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.