Quick answers
- Does Mary Ann A. Serian accept Medicare assignment?
- Yes. Medicare's clinician data says Mary Ann A. Serian 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 A. Serian see?
- In 2024, CMS data shows 81 Original Medicare patients and 83 services for Mary Ann A. Serian. This counts Original Medicare only and measures volume, not quality.
- What is Mary Ann A. Serian's NPI number?
- 1780614321. 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 A. Serian, 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 | 81 |
|---|---|
| Services billed to Medicare | 83 |
| Different services or procedures | 4 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Anesthesia for other procedure on large bowel using an endoscope (00811)39 services
- Anesthesia for exam of colon using an endoscope (00812)26 services
- Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope (00731)14 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 pressure52%
- Arthritis35%
- Osteoporosis23%
- Anxiety17%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)17%
Practice locations
Addresses where Mary Ann A. Serian is enrolled with Medicare (CMS data updated October 2, 2026).
- 45 A Discovery WayActon, MA 01720 (617) 936‑7683
Group practices
Medicare enrollment lists Mary Ann A. Serian as a member of this group (CMS data updated October 2, 2026).
- Gbaa Holdings PLLC21 clinicians in the group
Specialties
Find other clinicians: Certified Registered Nurse Anesthetist (CRNA), Massachusetts →
Other nurse anesthetists in Massachusetts
Clinicians with the same Medicare primary specialty in Massachusetts — not a recommendation.
Other clinicians in Gbaa Holdings PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | CNA |
|---|---|
| Graduation year | 1980 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780614321 |
| 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