Mark Liss, MD
NPI 1902906142 · Specialist · New Rochelle, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Liss, MD is a Specialist provider in New Rochelle, NY (NPI 1902906142).
Provider details
- NPI number
- 1902906142
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 137170 (NY)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
476 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 96 | $191 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 88 | $136 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 73 | $145 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 72 | $102 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 47 | $233 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 112 | 34 |
| Famotidine | 91 | 25 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 63 | 60 |
| Pantoprazole Sodium | 60 | 18 |
| Linaclotidebrand: Linzess | 44 | 13 |
| Mesalamine | 41 | — |
| Sucralfate | 26 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$111 across 5 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
Registry dates
- Enumerated
- 2006-09-25
- Last updated
- 2010-12-13
Frequently asked questions
- What is Mark Liss's NPI number?
- Mark Liss's National Provider Identifier (NPI) is 1902906142, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Liss's specialty?
- Mark Liss is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mark Liss located?
- Mark Liss's practice location on file with NPPES is 140 Lockwood Ave, New Rochelle, NY 10801-4915.
- What is Mark Liss's phone number?
- The practice phone number listed in the NPPES registry for Mark Liss is (914) 633-0888.
- Does Mark Liss accept Medicare?
- Mark Liss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Liss's NPI active?
- Yes — Mark Liss's NPI (1902906142) is active in the NPPES registry as of the last update on 2010-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.