Quick answers
- Does Sean W. Welsh accept Medicare assignment?
- Yes. Medicare's clinician data says Sean W. Welsh 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 Sean W. Welsh see?
- In 2024, CMS data shows 202 Original Medicare patients and 680 services for Sean W. Welsh. This counts Original Medicare only and measures volume, not quality.
- What is Sean W. Welsh's NPI number?
- 1619232493. 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 Sean W. Welsh, 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 | 202 |
|---|---|
| Services billed to Medicare | 680 |
| Different services or procedures | 31 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)339 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)21 services
- Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)11 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%
- Arthritis50%
- Diabetes41%
- Ischemic heart disease23%
- Osteoporosis22%
Practice locations
Addresses where Sean W. Welsh is enrolled with Medicare (CMS data updated October 2, 2026).
- 7624 Painter Ave, Suite 100Whittier, CA 90602 (562) 945‑9333
Group practices
Medicare enrollment lists Sean W. Welsh as a member of this group (CMS data updated October 2, 2026).
- Maguire and Welsh Medical Group4 clinicians in the group
Specialties
- Preventive Medicineprimary
Other preventive medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Maguire and Welsh Medical Group
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| 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) | 1619232493 |
| 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
- 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