Quick answers
- Does Lief A. Sorensen accept Medicare assignment?
- Yes. Medicare's clinician data says Lief A. Sorensen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Lief A. Sorensen see?
- In 2024, CMS data shows 101 Original Medicare patients and 354 services for Lief A. Sorensen. This counts Original Medicare only and measures volume, not quality.
- What is Lief A. Sorensen's NPI number?
- 1770639452. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Lief A. Sorensen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 101 |
|---|---|
| Services billed to Medicare | 354 |
| Different services or procedures | 24 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)75 services
- Injection of substance into lower spine canal using imaging guidance (62323)48 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)40 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)31 services
- Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)26 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Arthritis75%
- High cholesterol73%
- High blood pressure55%
- Ischemic heart disease29%
- Anxiety28%
- Osteoporosis28%
Hospitals where Lief A. Sorensen works
Medicare's Facility Affiliation Data lists Lief A. Sorensen at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- AdventHealth AvistaLouisville, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: not listed by Medicare · CCN 060103
Practice locations
Addresses where Lief A. Sorensen is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Health Park DrLouisville, CO 80027 (303) 643‑1159
- 2535 S Downing StDenver, CO 80210 (303) 778‑5797
- 80 Health Park Dr, Suite 270Louisville, CO 80027
Group practices
Medicare enrollment lists Lief A. Sorensen as a member of this group (CMS data updated October 2, 2026).
- Portercare Adventist Health System774 clinicians in the group
Specialties
- Anesthesiologyprimary
- Pain Managementalso
Other anesthesiologists in Louisville
Clinicians with the same Medicare primary specialty in Louisville, CO — not a recommendation.
Other clinicians in Portercare Adventist Health System
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Loma Linda University School Of Medicine |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770639452 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians