Ronald J. Ruby, MD
Endocrinology, Diabetes & Metabolism Physician · Manhattan Beach, CA
Ronald J. Ruby, MD is an endocrinology, diabetes & metabolism physician with a practice address in Manhattan Beach, California, and NPI 1568475044, issued on Aug 14, 2006. Check the license (California G34101, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald J. Ruby
- Credential
- MD
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License number
- G34101 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1101 N Sepulveda Blvd, Manhattan Beach, CA 90266
- Phone
- (310) 545-6627
- Enumerated
- Aug 14, 2006
- Record last updated
- Oct 22, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid IDs
- GR0064100 CA
00G341010 CA - Medicare enrollment
- Enrolled (PECOS I20040301001177); accepts Medicare assignment
- Medical or professional school
- University Of Texas Southwestern Medical School At Dallas, 1973
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 1,131 in California → Look up another NPI →
Also registered at 1101 N Sepulveda Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ronald J. Ruby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G34101Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% more Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
4,848 Medicare Part D claims for 403 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 22% of claims. 15 claims were for opioids.
Most prescribed
- Atorvastatin Calcium388 claims
- Levothyroxine Sodium350 claims
- Pioglitazone Hcl242 claims
- Rosuvastatin Calcium231 claims
- Metformin Hcl194 claims
- Mounjaro147 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.
Industry payments in 2024: $338.47
7 payments; by number, the most common kind was food and beverage; the largest payer was Ucb, Inc. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Providence Medical InstituteLaguna Niguel, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald J. Ruby among 1,131 endocrinology, diabetes & metabolism physician records in California
Ronald J. Ruby, MD is one of 1,131 endocrinology, diabetes & metabolism physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 54% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1973 · median 2003 among the 779 with a school on file
- Record last updated2007 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in California
There are 1,131 endocrinology, diabetes & metabolism physician records in California.
All 1,131 in California → Every provider in Manhattan Beach → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Geliann Kitsigianis, M.D.Malibu, CA 902631518082544
- Sylvia Shaw, MDLynwood, CA 902621093726663
- Gladys Palomeno, M.D.Rancho Palos Verdes, CA 902751164522116
- Jerry Gerson, MDRedondo Beach, CA 902771235295668
- Lubna Naqi, M.D.Redondo Beach, CA 902771992810642
- Lawrence Parker, M.D.Redondo Beach, CA 902771659463560
- Robert Rubin, MDRedondo Beach, CA 902771659910743
- Lydia Robles Gomez, M.D.South Gate, CA 902801073136495
Common questions
What is Ronald J. Ruby, MD's NPI number?
Ronald J. Ruby, MD's National Provider Identifier (NPI) is 1568475044, issued on Aug 14, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Ruby, MD located?
The NPPES record lists a practice address at 1101 N Sepulveda Blvd, Manhattan Beach, CA, 90266. Phone: (310) 545-6627. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Ruby, MD's license?
NPPES lists California license number G34101, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ronald J. Ruby, MD prescribe under Medicare Part D?
In 2024, Ronald J. Ruby, MD had 4,848 Medicare Part D claims for 403 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. 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.