Kathryn Mazzarella, NP
NPI 1922522929 · Gerontology Nurse Practitioner · New York, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Mazzarella, NP is a Gerontology Nurse Practitioner provider in New York, NY (NPI 1922522929).
Provider details
- NPI number
- 1922522929
- Entity type
- Individual
- Primary specialty
- Gerontology Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 927502 (TX)
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
8 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
104 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 High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 87 | $140 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 17 | $100 |
Typical Medicare-allowed amounts for these services range $100–$140 (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 · 15 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ruxolitinib Phosphatebrand: Jakafi | 65 | 15 |
| Acyclovir | 52 | 19 |
| Prednisone | 31 | — |
| Letermovirbrand: Prevymis | 24 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 24 | — |
| Atovaquone | 22 | — |
| Filgrastim-Sndzbrand: Zarxio | 20 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-08-01
- Last updated
- 2018-11-09
Frequently asked questions
- What is Kathryn Mazzarella's NPI number?
- Kathryn Mazzarella's National Provider Identifier (NPI) is 1922522929, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Mazzarella's specialty?
- Kathryn Mazzarella is listed in the NPPES registry with a primary specialty of Gerontology Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Kathryn Mazzarella located?
- Kathryn Mazzarella's practice location on file with NPPES is 1275 York Ave, New York, NY 10065.
- What is Kathryn Mazzarella's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Mazzarella is (516) 647-2075.
- Does Kathryn Mazzarella accept Medicare?
- Kathryn Mazzarella is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Mazzarella's NPI active?
- Yes — Kathryn Mazzarella's NPI (1922522929) is active in the NPPES registry as of the last update on 2018-11-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.