Mark Fairweather, MD
NPI 1437391232 · Surgery Physician · Boston, MA
Enrolled with Medicare as Practitioner - Surgical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Fairweather, MD is a Surgery Physician provider in Boston, MA (NPI 1437391232).
Provider details
- NPI number
- 1437391232
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 250373 (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
17 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
130 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) |
|---|---|---|
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 34 | $190 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 34 | $190 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 23 | $82 |
| Ultrasonic Guidance During Surgery76998 | 14 | $47 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 14 | $140 |
| Repair of Abdomen Using Abdominal Lining Graft49905 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-03-25
- Last updated
- 2018-06-18
Frequently asked questions
- What is Mark Fairweather's NPI number?
- Mark Fairweather's National Provider Identifier (NPI) is 1437391232, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Fairweather's specialty?
- Mark Fairweather is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Fairweather located?
- Mark Fairweather's practice location on file with NPPES is 75 Francis St, Boston, MA 02115.
- What is Mark Fairweather's phone number?
- The practice phone number listed in the NPPES registry for Mark Fairweather is (617) 732-6861.
- Does Mark Fairweather accept Medicare?
- Mark Fairweather is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Fairweather's NPI active?
- Yes — Mark Fairweather's NPI (1437391232) is active in the NPPES registry as of the last update on 2018-06-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.