Nathan Nazzise, D.O.
NPI 1891145793 · Emergency Medicine Physician · San Jose, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Nazzise, D.O. is a Emergency Medicine Physician provider in San Jose, CA (NPI 1891145793).
Provider details
- NPI number
- 1891145793
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 274346-441 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 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
15 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 15 | $186 |
Typical Medicare-allowed amounts for these services range $186–$186 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 37 | 37 |
| Famotidine | 25 | 25 |
| Cephalexin | 21 | 21 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 19 | 19 |
| Ciprofloxacin Hcl | 16 | 16 |
| Lidocaine | 16 | 16 |
| Prednisone | 15 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-21
- Last updated
- 2022-02-11
- Certified
- 2020-05-27
Frequently asked questions
- What is Nathan Nazzise's NPI number?
- Nathan Nazzise's National Provider Identifier (NPI) is 1891145793, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Nazzise's specialty?
- Nathan Nazzise is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Nazzise located?
- Nathan Nazzise's practice location on file with NPPES is 250 Hospital Pkwy, San Jose, CA 95119-1103.
- What is Nathan Nazzise's phone number?
- The practice phone number listed in the NPPES registry for Nathan Nazzise is (408) 972-3000.
- Does Nathan Nazzise accept Medicare?
- Nathan Nazzise is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Nazzise's NPI active?
- Yes — Nathan Nazzise's NPI (1891145793) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.