Quick answers
- Does Irving Posalski accept Medicare assignment?
- Yes. Medicare's clinician data says Irving Posalski 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 Irving Posalski see?
- In 2024, CMS data shows 433 Original Medicare patients and 1,994 services for Irving Posalski. This counts Original Medicare only and measures volume, not quality.
- What is Irving Posalski's NPI number?
- 1336172378. 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 Irving Posalski, 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 | 433 |
|---|---|
| Services billed to Medicare | 1,994 |
| Different services or procedures | 30 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)801 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)234 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)214 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)176 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)172 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 blood pressure75%
- High cholesterol75%
- Arthritis66%
- Ischemic heart disease54%
- Chronic kidney disease42%
- Heart failure41%
Hospitals where Irving Posalski works
Medicare's Facility Affiliation Data lists Irving Posalski 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.
- Cedars-Sinai Medical CenterLos Angeles, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050625
- Providence Cedars Sinai Tarzana Medical CenterTarzana, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 050761
Practice locations
Addresses where Irving Posalski is enrolled with Medicare (CMS data updated October 2, 2026).
- 8635 W 3rd St, Suite 1185Los Angeles, CA 90048 (310) 855‑1960
Group practices
Medicare enrollment lists Irving Posalski as a member of this group (CMS data updated October 2, 2026).
- Comprehensive Care Id Medical Group4 clinicians in the group
Specialties
- Infectious Diseaseprimary
Other infectious disease doctors in Los Angeles
Clinicians with the same Medicare primary specialty in Los Angeles, CA — not a recommendation.
Other clinicians in Comprehensive Care Id Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1973 (53 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) | 1336172378 |
| 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