Quick answers
- Does David J. Andorsky accept Medicare assignment?
- Yes. Medicare's clinician data says David J. Andorsky 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 David J. Andorsky see?
- In 2024, CMS data shows 607 Original Medicare patients and 100,367 services for David J. Andorsky. This counts Original Medicare only and measures volume, not quality.
- What is David J. Andorsky's NPI number?
- 1609061837. 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 David J. Andorsky, 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 | 607 |
|---|---|
| Services billed to Medicare | 100,367 |
| Different services or procedures | 153 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, daratumumab, 10 mg and hyaluronidase-fihj (J9144)16,560 services
- Injection, pembrolizumab, 1 mg (J9271)11,600 services
- Injection, fosaprepitant, 1 mg (J1453)6,900 services
- Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mg (J1568)3,960 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)1,452 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).
- High cholesterol58%
- High blood pressure53%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)44%
- Arthritis43%
- Ischemic heart disease28%
- Osteoporosis24%
Hospitals where David J. Andorsky works
Medicare's Facility Affiliation Data lists David J. Andorsky 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
- Boulder Community HealthBoulder, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060027
- Longs Peak HospitalLongmont, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060128
Practice locations
Addresses where David J. Andorsky is enrolled with Medicare (CMS data updated October 2, 2026).
- 4715 Arapahoe AveBoulder, CO 80303 (303) 385‑2000
Group practices
Medicare enrollment lists David J. Andorsky as a member of this group (CMS data updated October 2, 2026).
- Rocky Mountain Cancer Centers LLP132 clinicians in the group
Specialties
- Hematology/Oncologyprimary
Other hematologist-oncologists in Colorado
Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.
Other clinicians in Rocky Mountain Cancer Centers LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Harvard Medical School |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1609061837 |
| 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