Gary Rivas, RD, PA-C
NPI 1477895621 · Physician Assistant · El Monte, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Rivas, RD, PA-C is a Physician Assistant provider in El Monte, CA (NPI 1477895621).
Provider details
- NPI number
- 1477895621
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- RD, PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- 1057294 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Dietary & Nutritional Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
34 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 19 | $118 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $84 |
Typical Medicare-allowed amounts for these services range $84–$118 (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 · 80 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 289 | 138 |
| Metformin Hcl | 134 | 69 |
| Amlodipine Besylate | 124 | 55 |
| Losartan Potassium | 117 | 60 |
| Omeprazole | 115 | 60 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 109 | 50 |
Practice location
Mailing address
Additional practice locations (1)
- 1500 Duarte RdDuarte, CA 91010-3012Phone: (800) 826-4673
Registry dates
- Enumerated
- 2013-03-25
- Last updated
- 2026-06-03
- Certified
- 2026-06-03
Frequently asked questions
- What is Gary Rivas's NPI number?
- Gary Rivas's National Provider Identifier (NPI) is 1477895621, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Rivas's specialty?
- Gary Rivas is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gary Rivas located?
- Gary Rivas's practice location on file with NPPES is 3144 Santa Anita Ave, El Monte, CA 91733-1316.
- What is Gary Rivas's phone number?
- The practice phone number listed in the NPPES registry for Gary Rivas is (626) 444-0333.
- Does Gary Rivas accept Medicare?
- Gary Rivas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Rivas's NPI active?
- Yes — Gary Rivas's NPI (1477895621) is active in the NPPES registry as of the last update on 2026-06-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.