Quick answers
- Does Lia K. Zappala accept Medicare assignment?
- Yes. Medicare's clinician data says Lia K. Zappala 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 Lia K. Zappala see?
- In 2024, CMS data shows 136 Original Medicare patients and 360 services for Lia K. Zappala. This counts Original Medicare only and measures volume, not quality.
- What is Lia K. Zappala's NPI number?
- 1851998579. 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 Lia K. Zappala, 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 | 136 |
|---|---|
| Services billed to Medicare | 360 |
| Different services or procedures | 28 |
| 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)94 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)86 services
- Urinalysis, manual test (81002)51 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)13 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%
- Arthritis43%
- Chronic kidney disease42%
- Diabetes40%
- Ischemic heart disease32%
Hospitals where Lia K. Zappala works
Medicare's Facility Affiliation Data lists Lia K. Zappala 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.
- PIH Health Hospital-WhittierWhittier, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050169
Practice locations
Addresses where Lia K. Zappala is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 6; the Medicare profile lists all.
- 11500 Brookshire AveDowney, CA 90241 (562) 904‑5000
- 12401 Washington BlvdWhittier, CA 90602 (562) 698‑0811
- 12401 Washington Blvd, Suite 100Whittier, CA 90602 (562) 967‑2885
- 12675 La Mirada Blvd, Suite 201and401La Mirada, CA 90638 (562) 903‑7339
- 14350 Whittier Blvd, Suite 100Whittier, CA 90605 (562) 907‑7600
Group practices
Medicare enrollment lists Lia K. Zappala as a member of this group (CMS data updated October 2, 2026).
- PIH Health Physicians622 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Downey
Clinicians with the same Medicare primary specialty in Downey, CA — not a recommendation.
Other clinicians in PIH Health Physicians
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2020 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851998579 |
| 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