Quick answers
- Does George H. Grifka accept Medicare assignment?
- Yes. Medicare's clinician data says George H. Grifka 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 George H. Grifka see?
- In 2024, CMS data shows 713 Original Medicare patients and 5,391 services for George H. Grifka. This counts Original Medicare only and measures volume, not quality.
- What is George H. Grifka's NPI number?
- 1326189580. 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 George H. Grifka, 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 | 713 |
|---|---|
| Services billed to Medicare | 5,391 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 78 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,109 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)574 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)460 services
- Rubidium rb-82, diagnostic, per study dose, up to 60 millicuries (A9555)360 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)291 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%
- Ischemic heart disease75%
- Arthritis50%
- Atrial fibrillation49%
- Diabetes32%
Hospitals where George H. Grifka works
Medicare's Facility Affiliation Data lists George H. Grifka 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.
- Saint John's Health CenterSanta Monica, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050290
Practice locations
Addresses where George H. Grifka is enrolled with Medicare (CMS data updated October 2, 2026).
- 2001 Santa Monica Blvd, 670wSanta Monica, CA 90404
- 2001 Santa Monica Blvd, Suite 670wSanta Monica, CA 90404 (310) 828‑3001
Specialties
- Cardiac Surgeryprimary
Other cardiac surgeons in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, Geffen School Of Medicine |
| Graduation year | 1977 (49 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326189580 |
| 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