Steven Shields, MD
NPI 1336235324 · Gastroenterology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Steven Shields, MD is a Gastroenterology Physician provider in Boston, MA (NPI 1336235324).
Provider details
- NPI number
- 1336235324
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 60021 (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
830 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 | 213 | $485 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 142 | $118 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 69 | $211 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 39 | $263 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 39 | $181 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-C | 124 | 118 |
| Omeprazole | 101 | 31 |
| Peg3350/Sod Sul/Nacl/Kcl/Asb/Cbrand: Peg3350-Sod Sul-Nacl-Kcl-Asb-C | 41 | 41 |
| Mesalamine | 34 | 11 |
| Pantoprazole Sodium | 29 | — |
| Mesalaminebrand: Mesalamine Er | 25 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-05
- Last updated
- 2021-02-25
- Certified
- 2021-02-25
Frequently asked questions
- What is Steven Shields's NPI number?
- Steven Shields's National Provider Identifier (NPI) is 1336235324, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Steven Shields's specialty?
- Steven Shields is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Steven Shields located?
- Steven Shields's practice location on file with NPPES is 133 Brookline Ave, Boston, MA 02215-3904.
- What is Steven Shields's phone number?
- The practice phone number listed in the NPPES registry for Steven Shields is (617) 421-1091.
- Does Steven Shields accept Medicare?
- Steven Shields is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Steven Shields's NPI active?
- Yes — Steven Shields's NPI (1336235324) is active in the NPPES registry as of the last update on 2021-02-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.