Charles Bliss, MD
NPI 1740266477 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Charles Bliss, MD is a Gastroenterology Physician provider in Boston, MA (NPI 1740266477).
Provider details
- NPI number
- 1740266477
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 74783 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
192 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 40 | $261 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 38 | $181 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 36 | $102 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 29 | $69 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 14 | $130 |
| Colorectal Cancer Screening; Colonoscopy on Individual at High Risk |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 72 | 23 |
| Omeprazole | 68 | 21 |
| Pantoprazole Sodium | 65 | 17 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 51 | 51 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 43 | 42 |
| Dicyclomine Hcl | 33 | — |
| Loperamide Hclbrand: Loperamide | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-15
- Last updated
- 2021-05-03
- Certified
- 2021-05-03
Frequently asked questions
- What is Charles Bliss's NPI number?
- Charles Bliss's National Provider Identifier (NPI) is 1740266477, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Charles Bliss's specialty?
- Charles Bliss is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Charles Bliss located?
- Charles Bliss's practice location on file with NPPES is 830 Harrison Avenue, Boston, MA 02118-2905.
- What is Charles Bliss's phone number?
- The practice phone number listed in the NPPES registry for Charles Bliss is (617) 638-6525.
- Does Charles Bliss accept Medicare?
- Charles Bliss is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Charles Bliss's NPI active?
- Yes — Charles Bliss's NPI (1740266477) is active in the NPPES registry as of the last update on 2021-05-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.