Leon Michael Kogan, M.D.
Gastroenterology · Internal Medicine (CMS) · Babylon, NY
At a glance
400 W Main St Ste 300, Babylon, NY 11702-3019
Published activity: Colonoscopy · Upper gastrointestinal (GI) endoscopy for acid reflux. View counts and coverage
NPPES record updated Oct 25, 2024. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
400 W Main St Ste 300Babylon, NY 11702-3019
Additional reported practice locations
580 St. Johnsbury Rd.Littleton, NH 03561
Phone: 6032597798
Fax: 2019861871 1945 State Route 33
Neptune, NJ 077534859
Phone: 7328972770
Fax: 7328973970
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2002
- CMS specialties
- Gastroenterology · Internal Medicine
Practice groups
Reported hospital affiliations
- Good Samaritan Hospital Medical Center West Islip, NY
- St Catherine Of Siena Hospital Smithtown, NY
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
| Procedure category | Published Medicare activity |
|---|---|
| Colonoscopy | 127 |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 146 |
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
Includes reported transfers of value, such as meals, travel, or consulting. Payments do not establish improper conduct or quality of care. Research funding and ownership values are excluded from this total.
See payment purposes and reporting companies
Reported purposes
| Purpose | Amount |
|---|---|
| Food and beverage | $847.21 |
Reporting companies
| Company | Amount |
|---|---|
| ABBVIE INC. | $339.80 |
| ARDELYX, INC. | $78.69 |
| ORGANON LLC | $78.42 |
| GENZYME CORPORATION | $63.61 |
| TAKEDA PHARMACEUTICALS U.S.A., INC. | $57.77 |
| JANSSEN BIOTECH, INC. | $46.24 |
| SALIX PHARMACEUTICALS, A DIVISION OF BAUSCH HEALTH US, LLC | $44.44 |
| INTERCEPT PHARMACEUTICALS, INC. | $35.89 |
| Other reporting companies | $102.35 |
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Gastroenterology · Internal Medicine (CMS)
- Taxonomy code
- 207RG0100X
- Enumeration date
- Sep 30, 2008
- Record updated
- Oct 25, 2024
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- M.D.
Reported taxonomies and licenses
207RG0100X
License reported: 15962 NH
207RG0100X
License reported: NJ 25MA09015600 NJ
207RG0100X · Primary
License reported: 240404 NY
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
400 W Main St Ste 300Babylon, NY 11702-3019
- Phone
- (631) 321-6400
- Fax
- (631) 321-2969
Mailing address
331 NEWMAN SPRINGS RD STE 220RED BANK, NJ 077015792
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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