Quick answers
- Does Leah K. Calderon accept Medicare assignment?
- Yes. Medicare's clinician data says Leah K. Calderon 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 Leah K. Calderon see?
- In 2024, CMS data shows 362 Original Medicare patients and 817 services for Leah K. Calderon. This counts Original Medicare only and measures volume, not quality.
- What is Leah K. Calderon's NPI number?
- 1285373175. 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 Leah K. Calderon, 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 | 362 |
|---|---|
| Services billed to Medicare | 817 |
| Different services or procedures | 46 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)279 services
- Detection test by immunoassay with direct visual observation for severe acute respiratory syndrome coronavirus 2 (covid-19) (87811)109 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)98 services
- Automated urinalysis test (81003)62 services
- Detection test by immunoassay with direct visual observation for influenza virus (87804)40 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%
- High blood pressure68%
- Arthritis43%
- Diabetes29%
- Anxiety22%
- Ischemic heart disease21%
Practice locations
Addresses where Leah K. Calderon is enrolled with Medicare (CMS data updated October 2, 2026).
- 1730 Merritt BlvdDundalk, MD 21222 (410) 650‑4730
- 25 Kent Town MarketChester, MD 21619 (667) 343‑9501
Group practices
Medicare enrollment lists Leah K. Calderon as a member of this group (CMS data updated October 2, 2026).
- Umms Ambulatory Care LLC53 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Dundalk
Clinicians with the same Medicare primary specialty in Dundalk, MD — not a recommendation.
Other clinicians in Umms Ambulatory Care LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2022 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1285373175 |
| 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