Thomas Mcmahon, MD
NPI 1558399709 · Surgery Physician · Anaconda, MT
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Mcmahon, MD is a Surgery Physician provider in Anaconda, MT (NPI 1558399709).
Provider details
- NPI number
- 1558399709
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 8098 (MT)
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
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
5 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
37 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) |
|---|---|---|
| Insertion of Cage Or Mesh Device to Spine Bone and Disc Space During Spine Fusion22853 | 23 | $40 |
| Fusion of Lower Spine Bone Through Abdomen With Partial Removal of Disc22558 | 14 | $876 |
Typical Medicare-allowed amounts for these services range $40–$876 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$111 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
Additional practice locations (4)
- 2827 Fort Missoula RdMissoula, MT 59804-7408Phone: (406) 728-4100
- 710 Birchwood Ave Ste 101Bellingham, WA 98225-1720Phone: (360) 676-0922
- 2901 Squalicum PkwyBellingham, WA 98225-1851Phone: (360) 734-5400
- 520 N 4th AvePasco, WA 99301-5257Phone: (509) 547-7704
Registry dates
- Enumerated
- 2006-06-28
- Last updated
- 2024-01-12
- Certified
- 2024-01-12
Frequently asked questions
- What is Thomas Mcmahon's NPI number?
- Thomas Mcmahon's National Provider Identifier (NPI) is 1558399709, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Mcmahon's specialty?
- Thomas Mcmahon is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Mcmahon located?
- Thomas Mcmahon's practice location on file with NPPES is 305 W Pennsylvania Ave, Anaconda, MT 59711-1900.
- What is Thomas Mcmahon's phone number?
- The practice phone number listed in the NPPES registry for Thomas Mcmahon is (406) 563-8571.
- Does Thomas Mcmahon accept Medicare?
- Thomas Mcmahon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Mcmahon's NPI active?
- Yes — Thomas Mcmahon's NPI (1558399709) is active in the NPPES registry as of the last update on 2024-01-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.