Quick answers
- Does Omkar S. Marathe accept Medicare assignment?
- Yes. Medicare's clinician data says Omkar S. Marathe 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 Omkar S. Marathe see?
- In 2024, CMS data shows 258 Original Medicare patients and 32,025 services for Omkar S. Marathe. This counts Original Medicare only and measures volume, not quality.
- What is Omkar S. Marathe's NPI number?
- 1982989836. 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 Omkar S. Marathe, 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 | 258 |
|---|---|
| Services billed to Medicare | 32,025 |
| Different services or procedures | 86 |
| Participating Medicare provider | Yes |
| Average age of these patients | 70 |
Most frequent services
- Injection, ondansetron hydrochloride, per 1 mg (J2405)1,156 services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)700 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)232 services
- Telephone medical discussion with physician, 11-20 minutes (99442)108 services
- Enhancing oncology model (eom) monthly enhanced oncology services (meos) payment for eom enhanced services (M0010)106 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 cholesterol72%
- Diabetes55%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)48%
- Arthritis39%
- Chronic kidney disease38%
Hospitals where Omkar S. Marathe works
Medicare's Facility Affiliation Data lists Omkar S. Marathe 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.
- Martin Luther King, Jr. Community HospitalLos Angeles, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050779
- Memorialcare Long Beach Medical CenterLong Beach, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: not listed by Medicare · CCN 050485
- Saint Francis Medical CenterLynwood, CA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: not listed by Medicare · CCN 050104
- St Mary Medical CenterLong Beach, CA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 050191
- UCI Health-OrangeOrange, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050348
Practice locations
Addresses where Omkar S. Marathe is enrolled with Medicare (CMS data updated October 2, 2026).
- 3300 E S St, Suite 304Lakewood, CA 90805 (562) 232‑0550
- 3851 Katella Ave, Suite 355Los Alamitos, CA 90720 (562) 264‑5154
Group practices
Medicare enrollment lists Omkar S. Marathe as a member of this group (CMS data updated October 2, 2026).
- The Oncology Institute Ca, a Professional Corporation113 clinicians in the group
Specialties
- Hematology/Oncologyprimary
- Internal Medicinealso
Other hematologist-oncologists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in The Oncology Institute Ca, a Professional Corporation
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2010 (16 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) | 1982989836 |
| 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