Alyson Larsen, PA-C
NPI 1417516162 · Physician Assistant · Boston, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alyson Larsen, PA-C is a Physician Assistant provider in Boston, MA (NPI 1417516162).
Provider details
- NPI number
- 1417516162
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
7 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
28 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 15 | $15 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 13 | $59 |
Typical Medicare-allowed amounts for these services range $15–$59 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 42 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 104 | 34 |
| Losartan Potassium | 75 | 22 |
| Lisinopril | 67 | 22 |
| Atorvastatin Calcium | 66 | 19 |
| Allopurinol | 61 | 21 |
| Dapagliflozin Propanediolbrand: Farxiga | 56 | 14 |
| Calcitriol | 53 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2019-06-06
- Last updated
- 2023-01-05
- Certified
- 2023-01-05
Frequently asked questions
- What is Alyson Larsen's NPI number?
- Alyson Larsen's National Provider Identifier (NPI) is 1417516162, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alyson Larsen's specialty?
- Alyson Larsen is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Alyson Larsen located?
- Alyson Larsen's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Alyson Larsen's phone number?
- The practice phone number listed in the NPPES registry for Alyson Larsen is (617) 636-5000.
- Does Alyson Larsen accept Medicare?
- Alyson Larsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alyson Larsen's NPI active?
- Yes — Alyson Larsen's NPI (1417516162) is active in the NPPES registry as of the last update on 2023-01-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.