Aaron Spicer, MD, MAS
Anesthesiology · Critical Care (Intensivists) · Pediatric Medicine (CMS) · Boston, MA
At a glance
300 Longwood Ave, Boston, MA 02115
NPPES record updated Aug 15, 2019. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
Insurance participation is not established by these public records. Ask the practice and your insurer about your specific plan and this location.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
300 Longwood AveBoston, MA 02115
Additional reported practice locations
300 Longwood AveBoston, MA 02115
Phone: 6173557737
Education & affiliations
- Medical / professional school
- Not reported in this file
- Graduation year
- 2008
- CMS specialties
- Anesthesiology · Critical Care (Intensivists) · Pediatric Medicine
Practice groups
Reported hospital affiliations
- Boston Children's Hospital Boston, MA
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Source: CMS Facility Affiliation Data · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Service-mix comparison is unavailable for this NPI in the imported Medicare service file.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Anesthesiology · Critical Care (Intensivists) · Pediatric Medicine (CMS)
- Taxonomy code
- 2080P0203X
- Enumeration date
- Jun 29, 2008
- Record updated
- Aug 15, 2019
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- MD, MAS
Reported taxonomies and licenses
207LP3000X
License reported: 262506 MA
207L00000X
License reported: 262506 MA
208000000X
License reported: 262506 MA
2080P0203X
License reported: A116860 CA
2080P0203X · Primary
License reported: 262506 MA
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
300 Longwood AveBoston, MA 02115
- Phone
- (617) 355-7737
Mailing address
300 LONGWOOD AVEBOSTON, MA 021155724
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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