Quick answers
- Does Cynthia M. Sieto accept Medicare assignment?
- Yes. Medicare's clinician data says Cynthia M. Sieto 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 Cynthia M. Sieto see?
- In 2024, CMS data shows 138 Original Medicare patients and 402 services for Cynthia M. Sieto. This counts Original Medicare only and measures volume, not quality.
- What is Cynthia M. Sieto's NPI number?
- 1518963487. 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 Cynthia M. Sieto, 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 | 138 |
|---|---|
| Services billed to Medicare | 402 |
| Different services or procedures | 7 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)341 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)31 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 cholesterol75%
- Depression75%
- Anxiety75%
- High blood pressure69%
- Arthritis48%
- Chronic kidney disease36%
Hospitals where Cynthia M. Sieto works
Medicare's Facility Affiliation Data lists Cynthia M. Sieto 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.
- St Lukes HospitalBethlehem, PA · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 390049
Practice locations
Addresses where Cynthia M. Sieto is enrolled with Medicare (CMS data updated October 2, 2026).
- 421 Chew StAllentown, PA 18102
- 421 W Chew StAllentown, PA 18102 (610) 776‑4959
- 451 Chew StAllentown, PA 18102
- 451 Chew St, Suite 400Allentown, PA 18102
- 801 Ostrm StBethlehem, PA 18015
Group practices
Medicare enrollment lists Cynthia M. Sieto as a member of this group (CMS data updated October 2, 2026).
- St Lukes Physician Group Inc2,198 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Allentown
Clinicians with the same Medicare primary specialty in Allentown, PA — not a recommendation.
Other clinicians in St Lukes Physician Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1518963487 |
| 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