Antonia Stephen, MD
NPI 1386626679 · Surgery Physician · Boston, MA
Enrolled with Medicare as Practitioner - Surgical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Antonia Stephen, MD is a Surgery Physician provider in Boston, MA (NPI 1386626679).
Provider details
- NPI number
- 1386626679
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 160829 (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
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
388 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) |
|---|---|---|
| Ultrasonic Guidance During Surgery76998 | 118 | $48 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 89 | $138 |
| Removal Or Exploration of Parathyroid Glands60500 | 67 | $971 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 56 | $102 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 25 | $102 |
| Removal of Thyroid Lobe on Side of Neck60220 | 20 | $706 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-14
- Last updated
- 2012-07-30
Frequently asked questions
- What is Antonia Stephen's NPI number?
- Antonia Stephen's National Provider Identifier (NPI) is 1386626679, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Antonia Stephen's specialty?
- Antonia Stephen is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Antonia Stephen located?
- Antonia Stephen's practice location on file with NPPES is 55 Fruit St, Boston, MA 02114-2621.
- What is Antonia Stephen's phone number?
- The practice phone number listed in the NPPES registry for Antonia Stephen is (617) 726-0531.
- Does Antonia Stephen accept Medicare?
- Antonia Stephen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Antonia Stephen's NPI active?
- Yes — Antonia Stephen's NPI (1386626679) is active in the NPPES registry as of the last update on 2012-07-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.