Sarah Flier, M.D.
NPI 1902939119 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sarah Flier, M.D. is a Gastroenterology Physician provider in Boston, MA (NPI 1902939119).
Provider details
- NPI number
- 1902939119
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 240579 (MA)
Specialties & taxonomies
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
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
265 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 82 | $108 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 61 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 28 | $102 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 26 | $158 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 25 | $109 |
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 |
|---|---|---|
| Ustekinumabbrand: Stelara | 123 | 23 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 92 | 88 |
| Pantoprazole Sodium | 41 | 15 |
| Mesalamine | 37 | 16 |
| Omeprazole | 29 | 14 |
| Adalimumabbrand: Humira(cf) Pen | 28 | — |
| Balsalazide Disodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-14
- Last updated
- 2009-08-28
Frequently asked questions
- What is Sarah Flier's NPI number?
- Sarah Flier's National Provider Identifier (NPI) is 1902939119, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sarah Flier's specialty?
- Sarah Flier is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Sarah Flier located?
- Sarah Flier's practice location on file with NPPES is 330 Brookline Ave, Boston, MA 02215-5400.
- What is Sarah Flier's phone number?
- The practice phone number listed in the NPPES registry for Sarah Flier is (617) 667-2136.
- Does Sarah Flier accept Medicare?
- Sarah Flier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sarah Flier's NPI active?
- Yes — Sarah Flier's NPI (1902939119) is active in the NPPES registry as of the last update on 2009-08-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.