Ferrin Katarina Ruiz, MD
Specialist · Montebello, CA
Ferrin Katarina Ruiz, MD is a specialist with a practice address in Montebello, California, and NPI 1477998870, issued on Apr 30, 2013. Check the license (California A132956, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Ferrin Katarina Ruiz
- Credential
- MD
- Primary taxonomy
- Specialist 174400000X
- License number
- A132956 CA
Self-reported in NPPES; status is on the state search - Practice location
- 833 W Whittier Blvd, Montebello, CA 90640
- Phone
- (323) 712-4811
- Enumerated
- Apr 30, 2013
- Record last updated
- Jan 16, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (323) 544-6488
- Medicare enrollment
- Enrolled (PECOS I20170729000039); may accept Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 2013
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 833 W Whittier Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Trinh Bui, DDSDentist1568527760
- Rafael Centeno, FNPFamily Nurse Practitioner1629445226
- Leonid Glosman, DDSDentist1053420216
- Katherine Gochingco, FNP-CFamily Nurse Practitioner1235879784
- Joanne Guerrero, NP-CFamily Nurse Practitioner1023654779
- Robert Hoang, DDSDentist1114080694
Verify Ferrin Katarina Ruiz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A132956Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.9 times the Medicare Part D claims of the average specialist in 2024
4,067 Medicare Part D claims for 398 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 56 claims were for opioids.
Most prescribed
- Atorvastatin Calcium317 claims
- Amlodipine Besylate175 claims
- Metformin Hcl173 claims
- Losartan Potassium171 claims
- Lisinopril145 claims
- Omeprazole138 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- R. Ruiz MD A Professional CorporationMontebello, CA
- Ruben Ruiz M D A Medical CorporationOntario, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ferrin Katarina Ruiz among 5,749 specialist records in California
Ferrin Katarina Ruiz, MD is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 69% of them.
- NPI issued2013 · 69% of these records are older, 28% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated2013 · median 1989 among the 1,075 with a school on file
- Record last updated2019 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
10 specialist records list a practice address in Montebello
They are 10 of the 728 NPPES records with a practice address in Montebello, and 5,749 specialist records in California.
All 5,749 in California → Every provider in Montebello → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Shamik Bhadra, MDMontebello, CA 906401114910908
- Zoanne Clack, M.D.Montebello, CA 906401174582399
- Stephen Lee, M.D.,FACOGMontebello, CA 906401891772026
- Cecilia Lin, MDMontebello, CA 906401295746220
- Prabhat Manchanda, MDMontebello, CA 906401588618409
- John RiveraMontebello, CA 906401427279629
- Anjana Sura, M.D.Montebello, CA 906401972530418
- Christopher Thompson, M.D.Montebello, CA 906401689631178
Common questions
What is Ferrin Katarina Ruiz, MD's NPI number?
Ferrin Katarina Ruiz, MD's National Provider Identifier (NPI) is 1477998870, issued on Apr 30, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Ferrin Katarina Ruiz, MD located?
The NPPES record lists a practice address at 833 W Whittier Blvd, Montebello, CA, 90640. Phone: (323) 712-4811. Providers update this record themselves, so call before visiting.
How can I verify Ferrin Katarina Ruiz, MD's license?
NPPES lists California license number A132956, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Ferrin Katarina Ruiz, MD prescribe under Medicare Part D?
In 2024, Ferrin Katarina Ruiz, MD had 4,067 Medicare Part D claims for 398 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.