Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
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John Ruddy, MD

Individual provider Pulmonary Disease Physician · NPI 1902890130

John Ruddy, MD practises Sleep Medicine in San Leandro, California. Graduated from Georgetown University School of Medicine in 1980, 46 years ago. Practices with Puja Thakkar DO Medical Corporation, a 7-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
46
Trained at
Georgetown University School of Medicine
Licensed in
CA
In the registry since
2005
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

13939 E 14th St
San Leandro, CA 94578-2601
Phone: (510) 263-3300
Fax: (510) 263-3350
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence G58800 (CA)

Record details

NPI number1902890130
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 2, 2005
Last updated in NPPESMarch 25, 2021
Certification dateMarch 25, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtySLEEP MEDICINE
Medical schoolGEORGETOWN UNIVERSITY SCHOOL OF MEDICINE
Graduated 1980 (46 years in practice)
Group practice Puja Thakkar Do Medical Corporation — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients192
Services billed 473 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Puja Thakkar DO Medical Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 7 clinicians in the practice; 4 are shown here.

Other providers in San Leandro