Mark Epstein, M.D.
NPI 1891760005 · Specialist · Concord, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Epstein, M.D. is a Specialist provider in Concord, MA (NPI 1891760005).
Provider details
- NPI number
- 1891760005
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 157680 (MA)
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
20 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
510 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 | 158 | $138 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 60 | $261 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 57 | $140 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 44 | $147 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High RiskG0105 | 42 | $182 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetron Hcl | 118 | 114 |
| Omeprazole | 100 | 51 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 48 | 48 |
| Famotidine | 43 | 15 |
| Sucralfate | 38 | 14 |
| Cholestyramine (with Sugar)brand: Cholestyramine | 28 | 11 |
| Dicyclomine Hcl | 24 | — |
| Mesalamine |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,631 across 77 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
- 2006-02-21
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Epstein's NPI number?
- Mark Epstein's National Provider Identifier (NPI) is 1891760005, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Epstein's specialty?
- Mark Epstein is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Mark Epstein located?
- Mark Epstein's practice location on file with NPPES is 131 Ornac, Concord, MA 01742.
- What is Mark Epstein's phone number?
- The practice phone number listed in the NPPES registry for Mark Epstein is (978) 371-1551.
- Does Mark Epstein accept Medicare?
- Mark Epstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Epstein's NPI active?
- Yes — Mark Epstein's NPI (1891760005) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.