Gearoid Mcmahon, MB BCH BAO
NPI 1992025274 · Nephrology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gearoid Mcmahon, MB BCH BAO is a Nephrology Physician provider in Boston, MA (NPI 1992025274).
Provider details
- NPI number
- 1992025274
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MB BCH BAO
- Sex
- Male
- Sole proprietor
- No
- License
- 244817 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,353 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 35 Minutes99232 | 471 | $82 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 327 | $123 |
| Dialysis Procedure Including 1 Evaluation90945 | 194 | $90 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 121 | $100 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 78 | $180 |
| Hemodialysis Procedure With Physician Evaluation90935 | 62 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Empagliflozinbrand: Jardiance | 33 | 12 |
| Calcitriol | 31 | 11 |
| Lisinopril | 18 | — |
| Hydrochlorothiazide | 17 | — |
| Dapagliflozin Propanediolbrand: Farxiga | 15 | — |
| Amlodipine Besylate | 13 | — |
| Allopurinol | 11 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$5 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-09
- Last updated
- 2021-05-05
- Certified
- 2021-05-05
Frequently asked questions
- What is Gearoid Mcmahon's NPI number?
- Gearoid Mcmahon's National Provider Identifier (NPI) is 1992025274, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gearoid Mcmahon's specialty?
- Gearoid Mcmahon is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is Gearoid Mcmahon located?
- Gearoid Mcmahon's practice location on file with NPPES is 75 Francis St, Boston, MA 02115-6110.
- What is Gearoid Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Gearoid Mcmahon is (617) 732-5500.
- Does Gearoid Mcmahon accept Medicare?
- Gearoid Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gearoid Mcmahon's NPI active?
- Yes — Gearoid Mcmahon's NPI (1992025274) is active in the NPPES registry as of the last update on 2021-05-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.