Marybeth Zambella, APRN
NPI 1528397908 · Psychiatric/Mental Health Nurse Practitioner · Boston, MA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marybeth Zambella, APRN is a Psychiatric/Mental Health Nurse Practitioner provider in Boston, MA (NPI 1528397908).
Provider details
- NPI number
- 1528397908
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APRN
- Sex
- Female
- Sole proprietor
- No
- License
- RN155312 (MA)
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
16 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
165 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 | 108 | $81 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 32 | $119 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 25 | $116 |
Typical Medicare-allowed amounts for these services range $81–$119 (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 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 96 | 13 |
| Lorazepam | 84 | 12 |
| Dextroamphetamine/Amphetaminebrand: Dextroamphetamine-Amphetamine | 51 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 48 | — |
| Bupropion Hclbrand: Bupropion Xl | 42 | 12 |
| Fluoxetine Hcl | 38 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-12-15
- Last updated
- 2021-08-04
- Certified
- 2021-08-04
Frequently asked questions
- What is Marybeth Zambella's NPI number?
- Marybeth Zambella's National Provider Identifier (NPI) is 1528397908, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marybeth Zambella's specialty?
- Marybeth Zambella is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Marybeth Zambella located?
- Marybeth Zambella's practice location on file with NPPES is 800 Washington St, Boston, MA 02111-1552.
- What is Marybeth Zambella's phone number?
- The practice phone number listed in the NPPES registry for Marybeth Zambella is (617) 636-5400.
- Does Marybeth Zambella accept Medicare?
- Marybeth Zambella is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marybeth Zambella's NPI active?
- Yes — Marybeth Zambella's NPI (1528397908) is active in the NPPES registry as of the last update on 2021-08-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.