Quick answers
- Does Mary Ann Howerton accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Ann Howerton 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 Mary Ann Howerton see?
- In 2024, CMS data shows 274 Original Medicare patients and 542 services for Mary Ann Howerton. This counts Original Medicare only and measures volume, not quality.
- What is Mary Ann Howerton's NPI number?
- 1568714632. 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 Mary Ann Howerton, 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 | 274 |
|---|---|
| Services billed to Medicare | 542 |
| Different services or procedures | 17 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Removal of impacted ear wax (69210)154 services
- Exam of ear using a microscope (92504)115 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)94 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)68 services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)36 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 pressure70%
- Arthritis51%
- Diabetes27%
- Ischemic heart disease24%
- Anxiety22%
Hospitals where Mary Ann Howerton works
Medicare's Facility Affiliation Data lists Mary Ann Howerton 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.
- MUSC Medical CenterCharleston, SC · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 420004
Practice locations
Addresses where Mary Ann Howerton is enrolled with Medicare (CMS data updated October 2, 2026).
- 167 Ashley AveCharleston, SC 29425 (843) 792‑1414
- 171 Ashley AveCharleston, SC 29425 (843) 792‑1414
- 8992 University Blvd, Suite 100North Charleston, SC 29406 (843) 876‑2722
Group practices
Medicare enrollment lists Mary Ann Howerton as a member of this group (CMS data updated October 2, 2026).
- University Medical Associates of the Medical University of South Carol1,668 clinicians in the group
Specialties
- Physician Assistantprimary
Find other clinicians: Physician Assistant, South Carolina →
Other physician assistants in Charleston
Clinicians with the same Medicare primary specialty in Charleston, SC — not a recommendation.
Other clinicians in University Medical Associates of the Medical University of South Carol
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Graduation year | 2012 |
|---|---|
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568714632 |
| 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