Subbu Nagappan, MD
NPI 1285616185 · Surgery Physician · Riverside, CA
Enrolled with Medicare as Practitioner - General Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Subbu Nagappan, MD is a Surgery Physician provider in Riverside, CA (NPI 1285616185).
Provider details
- NPI number
- 1285616185
- Entity type
- Individual
- Primary specialty
- Surgery PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G70352 (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
20 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
308 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 35 Minutes99232 | 209 | $79 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 45 | $131 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 16 | $173 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 14 | $118 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 12 | $119 |
| Critical Care, First 30-74 Minutes99291 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-16
- Last updated
- 2010-12-29
Frequently asked questions
- What is Subbu Nagappan's NPI number?
- Subbu Nagappan's National Provider Identifier (NPI) is 1285616185, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Subbu Nagappan's specialty?
- Subbu Nagappan is listed in the NPPES registry with a primary specialty of Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Subbu Nagappan located?
- Subbu Nagappan's practice location on file with NPPES is 7117 Brockton Ave, Riverside, CA 92506-2615.
- What is Subbu Nagappan's phone number?
- The practice phone number listed in the NPPES registry for Subbu Nagappan is (951) 782-3651.
- Does Subbu Nagappan accept Medicare?
- Subbu Nagappan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Subbu Nagappan's NPI active?
- Yes — Subbu Nagappan's NPI (1285616185) is active in the NPPES registry as of the last update on 2010-12-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.