Nathaniel Defelice, M.D.
NPI 1366761496 · Critical Care Medicine (Internal Medicine) Physician · Sacramento, CA
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Defelice, M.D. is a Critical Care Medicine (Internal Medicine) Physician provider in Sacramento, CA (NPI 1366761496).
Provider details
- NPI number
- 1366761496
- Entity type
- Individual
- Primary specialty
- Critical Care Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 129005 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
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
360 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 156 | $118 |
| Critical Care, First 30-74 Minutes99291 | 148 | $211 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 33 | $169 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 23 | $80 |
Typical Medicare-allowed amounts for these services range $80–$211 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-05-28
- Last updated
- 2020-10-19
- Certified
- 2020-10-19
Frequently asked questions
- What is Nathaniel Defelice's NPI number?
- Nathaniel Defelice's National Provider Identifier (NPI) is 1366761496, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Defelice's specialty?
- Nathaniel Defelice is listed in the NPPES registry with a primary specialty of Critical Care Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Defelice located?
- Nathaniel Defelice's practice location on file with NPPES is 1508 Alhambra Blvd Ste 200, Sacramento, CA 95816-6510.
- What is Nathaniel Defelice's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Defelice is (916) 679-3590.
- Does Nathaniel Defelice accept Medicare?
- Nathaniel Defelice is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Defelice's NPI active?
- Yes — Nathaniel Defelice's NPI (1366761496) is active in the NPPES registry as of the last update on 2020-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.