Arissa Opalacz
NPI 1396410700 · Physician Assistant · Boston, MA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Arissa Opalacz is a Physician Assistant provider in Boston, MA (NPI 1396410700).
Provider details
- NPI number
- 1396410700
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- 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
4 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
162 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 86 | $85 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 32 | $129 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 23 | $119 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 21 | $117 |
Typical Medicare-allowed amounts for these services range $85–$129 (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 · 17 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 194 | 75 |
| Famotidine | 150 | 58 |
| Pantoprazole Sodium | 64 | 33 |
| Linaclotidebrand: Linzess | 46 | 20 |
| Esomeprazole Magnesium | 42 | — |
| Dicyclomine Hcl | 38 | 12 |
| Lipase/Protease/Amylasebrand: Creon | 37 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-08-09
- Last updated
- 2023-06-22
- Certified
- 2022-01-05
Frequently asked questions
- What is Arissa Opalacz's NPI number?
- Arissa Opalacz's National Provider Identifier (NPI) is 1396410700, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Arissa Opalacz's specialty?
- Arissa Opalacz is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Arissa Opalacz located?
- Arissa Opalacz's practice location on file with NPPES is 45 Francis St, Boston, MA 02115-6105.
- What is Arissa Opalacz's phone number?
- The practice phone number listed in the NPPES registry for Arissa Opalacz is (617) 732-6389.
- Does Arissa Opalacz accept Medicare?
- Arissa Opalacz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Arissa Opalacz's NPI active?
- Yes — Arissa Opalacz's NPI (1396410700) is active in the NPPES registry as of the last update on 2023-06-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.