Esperance Schaefer, M.D., ,M.P.H.
NPI 1588791917 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Esperance Schaefer, M.D., ,M.P.H. is a Gastroenterology Physician provider in Boston, MA (NPI 1588791917).
Provider details
- NPI number
- 1588791917
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., ,M.P.H.
- Sex
- Female
- Sole proprietor
- No
- License
- L-228690 (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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
625 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 101 | $121 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 92 | $135 |
| Moderate Sedation Services Provided By the Same Physician Or Other Qualified Health Care Professional Performing a Gastrointestinal Endoscopic Service That Sedation Supports, Requiring the Presence of an Independent Trained Observer to Assist in the MonitoG0500 | 65 | $6 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 63 | $179 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 56 | $258 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 68 | 30 |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 39 | 38 |
| Famotidine | 23 | — |
| Carvedilol | 16 | — |
| Furosemide | 15 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- 55 Fruit Street, Blake 4Massachusetts General Hospital, Gi UnitBoston, MA 02114Phone: (617) 724-6007Fax: (617) 724-6832
Registry dates
- Enumerated
- 2007-02-27
- Last updated
- 2023-08-31
- Certified
- 2023-08-31
Frequently asked questions
- What is Esperance Schaefer's NPI number?
- Esperance Schaefer's National Provider Identifier (NPI) is 1588791917, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Esperance Schaefer's specialty?
- Esperance Schaefer is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Esperance Schaefer located?
- Esperance Schaefer's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Esperance Schaefer's phone number?
- The practice phone number listed in the NPPES registry for Esperance Schaefer is (617) 732-5500.
- Does Esperance Schaefer accept Medicare?
- Esperance Schaefer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Esperance Schaefer's NPI active?
- Yes — Esperance Schaefer's NPI (1588791917) is active in the NPPES registry as of the last update on 2023-08-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.