John Ruddy, M.D.
Pulmonary Disease Physician · San Leandro, CA
John Ruddy, M.D. is a pulmonary disease physician with a practice address in San Leandro, California, and NPI 1902890130, issued on Sep 2, 2005. Check the license (California G58800, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Ruddy
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- G58800 CA
Self-reported in NPPES; status is on the state search - Practice location
- 13939 E 14TH St, San Leandro, CA 94578
- Phone
- (510) 263-3300
- Enumerated
- Sep 2, 2005
- Record last updated
- Mar 25, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (510) 263-3350
- Medicaid ID
- CA160376 CA
- Medicare enrollment
- Enrolled (PECOS I20150730011319); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 1980
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 13939 E 14TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Nelson MaPhysical Therapist1750828950
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Verify John Ruddy in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G58800Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average pulmonary disease physician in 2024
26 Medicare Part D claims for 11 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D.
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: $62.98
1 payment: food and beverage; the largest payer was Jazz Pharmaceuticals Inc. The 8,806 providers of this specialty with any payment received $5,159.88 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
- Puja Thakkar DO Medical CorporationSan Ramon, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
Other pulmonary disease physician records in California
- Manoochehr Abadian Sharifabad, M.D.Fountain Valley, CA1164655817
- Mahmoud Abdallah, DOGarden Grove, CA1871014027
- Mohamad Abdelfattah, MDFullerton, CA1134539711
- Loui Abdelghani, M.DStockton, CA1912161787
- Zainab Abdulsada, MBCHBSacramento, CA1144858333
- John Abe, MDTorrance, CA1578542569
- Moustapha Abidali, DOGlendora, CA1669810123
- Mohammed Abo Khamis, M.D.Modesto, CA1508098419
- Arin Aboulian, MDGlendale, CA1104038256
- Khader Abounasr, MDRancho Cucamonga, CA1780884015
Common questions
What is John Ruddy, M.D.'s NPI number?
John Ruddy, M.D.'s National Provider Identifier (NPI) is 1902890130, issued on Sep 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Ruddy, M.D. located?
The NPPES record lists a practice address at 13939 E 14TH St, San Leandro, CA, 94578. Phone: (510) 263-3300. Providers update this record themselves, so call before visiting.
How can I verify John Ruddy, M.D.'s license?
NPPES lists California license number G58800, 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 John Ruddy, M.D. prescribe under Medicare Part D?
In 2024, John Ruddy, M.D. had 26 Medicare Part D claims for 11 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. 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.