Nathaniel Fung, M.D.
NPI 1245686195 · Surgical Critical Care Physician · Moreno Valley, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Fung, M.D. is a Surgical Critical Care Physician provider in Moreno Valley, CA (NPI 1245686195).
Provider details
- NPI number
- 1245686195
- Entity type
- Individual
- Primary specialty
- Surgical Critical Care PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A179922 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
10 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
246 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 35 Minutes99232 | 60 | $79 |
| Critical Care, First 30-74 Minutes99291 | 47 | $211 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 39 | $118 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 29 | $173 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 28 | $49 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 18 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$50 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-05-10
- Last updated
- 2023-01-27
- Certified
- 2023-01-27
Frequently asked questions
- What is Nathaniel Fung's NPI number?
- Nathaniel Fung's National Provider Identifier (NPI) is 1245686195, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Fung's specialty?
- Nathaniel Fung is listed in the NPPES registry with a primary specialty of Surgical Critical Care Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Fung located?
- Nathaniel Fung's practice location on file with NPPES is 26520 Cactus Ave, Moreno Valley, CA 92555-3927.
- What is Nathaniel Fung's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Fung is (951) 486-5177.
- Does Nathaniel Fung accept Medicare?
- Nathaniel Fung is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Fung's NPI active?
- Yes — Nathaniel Fung's NPI (1245686195) is active in the NPPES registry as of the last update on 2023-01-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.