Quick answers
- Does Alasdair S. Donald accept Medicare assignment?
- Yes. Medicare's clinician data says Alasdair S. Donald 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 Alasdair S. Donald see?
- In 2024, CMS data shows 232 Original Medicare patients and 1,831 services for Alasdair S. Donald. This counts Original Medicare only and measures volume, not quality.
- What is Alasdair S. Donald's NPI number?
- 1821028309. 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 Alasdair S. Donald, 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 | 232 |
|---|---|
| Services billed to Medicare | 1,831 |
| Different services or procedures | 5 |
| Participating Medicare provider | Yes |
| Average age of these patients | 56 |
Most frequent services
- Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes (99231)1,780 services
- Psychiatric diagnostic evaluation with medical services (90792)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).
- Depression75%
- Anxiety75%
- High cholesterol65%
- High blood pressure62%
- Diabetes32%
- Arthritis30%
Practice locations
Addresses where Alasdair S. Donald is enrolled with Medicare (CMS data updated October 2, 2026).
- 49 Robinwood AveBoston, MA 02130 (617) 522‑4400
- 76 Summer StHaverhill, MA 01830 (978) 556‑6286
Group practices
Medicare enrollment lists Alasdair S. Donald as a member of these groups (CMS data updated October 2, 2026).
- Arbour Inc19 clinicians in the group
- WP Acquisition Sub LLC10 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Other clinicians in Arbour Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1984 (42 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1821028309 |
| 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