Ferrin Ruiz, MD
NPI 1477998870 · Specialist · Montebello, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ferrin Ruiz, MD is a Specialist provider in Montebello, CA (NPI 1477998870).
Provider details
- NPI number
- 1477998870
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A132956 (CA)
Specialties & taxonomies
Other 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
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
301 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 | 96 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 62 | $98 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 51 | $9 |
| Injection of Drug Or Substance Under Skin Or Into Muscle96372 | 39 | $16 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 17 | $21 |
| Administration of Influenza Virus VaccineG0008 | 13 | $35 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 81 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 317 | 129 |
| Amlodipine Besylate | 175 | 72 |
| Metformin Hcl | 173 | 80 |
| Losartan Potassium | 171 | 66 |
| Lisinopril | 145 | 60 |
| Omeprazole | 138 | 55 |
| Levothyroxine Sodium |
Practice location
Mailing address
Additional practice locations (2)
- 403 W F StOntario, CA 91762-3207Phone: (909) 988-3288Fax: (909) 988-6767
- 436 S Riverside AveRialto, CA 92376-6523Phone: (909) 877-8868Fax: (909) 877-0008
Registry dates
- Enumerated
- 2013-04-30
- Last updated
- 2019-01-16
Frequently asked questions
- What is Ferrin Ruiz's NPI number?
- Ferrin Ruiz's National Provider Identifier (NPI) is 1477998870, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ferrin Ruiz's specialty?
- Ferrin Ruiz is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Ferrin Ruiz located?
- Ferrin Ruiz's practice location on file with NPPES is 833 W Whittier Blvd, Montebello, CA 90640-4735.
- What is Ferrin Ruiz's phone number?
- The practice phone number listed in the NPPES registry for Ferrin Ruiz is (323) 712-4811.
- Does Ferrin Ruiz accept Medicare?
- Ferrin Ruiz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ferrin Ruiz's NPI active?
- Yes — Ferrin Ruiz's NPI (1477998870) is active in the NPPES registry as of the last update on 2019-01-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.