Thomas Bak, MD
NPI 1457445785 · Transplant Surgery Physician · Aurora, CO
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Bak, MD is a Transplant Surgery Physician provider in Aurora, CO (NPI 1457445785).
Provider details
- NPI number
- 1457445785
- Entity type
- Individual
- Primary specialty
- Transplant Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 33648 (CO)
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
35 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) |
|---|---|---|
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 24 | $49 |
| Removal of Kidney From Living Donor Using an Endoscope50547 | 11 | $1,589 |
Typical Medicare-allowed amounts for these services range $49–$1,589 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-10-03
- Last updated
- 2012-09-17
Frequently asked questions
- What is Thomas Bak's NPI number?
- Thomas Bak's National Provider Identifier (NPI) is 1457445785, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Bak's specialty?
- Thomas Bak is listed in the NPPES registry with a primary specialty of Transplant Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Bak located?
- Thomas Bak's practice location on file with NPPES is 12605 E 16th Ave, Aurora, CO 80045-2545.
- What is Thomas Bak's phone number?
- The practice phone number listed in the NPPES registry for Thomas Bak is (720) 848-0000.
- Does Thomas Bak accept Medicare?
- Thomas Bak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Bak's NPI active?
- Yes — Thomas Bak's NPI (1457445785) is active in the NPPES registry as of the last update on 2012-09-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.