JOHN RUDDY M.D.
NPI 1902890130
Internal Medicine - Pulmonary Disease in San Leandro, CA
About John Ruddy M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN RUDDY M.D. (NPI 1902890130) is an individual pulmonary disease provider in San Leandro, California, licensed in California (G58800) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS and is a graduate of Georgetown University School Of Medicine (1980).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John Ruddy M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show John Ruddy reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Danville, CA 94526
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Puja Thakkar Do Medical Corporation
- 7 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94578 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 15
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
SAN LEANDRO, CA 94578
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Ruddy's NPI number?
The NPI number for John Ruddy is 1902890130. It was assigned to this individual provider in the NPPES registry on September 2, 2005.
Where is John Ruddy located?
John Ruddy practices at 13939 E 14th St, San Leandro, CA 94578. The listed phone number is (510) 263-3300.
What is John Ruddy's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Pulmonary Disease, with taxonomy code 207RP1001X.
Is John Ruddy enrolled in Medicare?
Yes. John Ruddy is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for John Ruddy's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Ruddy reassigns Medicare benefits to Puja Thakkar, D.O., Medical Corporation (Danville, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Ruddy's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for John Ruddy was last updated on March 25, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John Ruddy, M.D. · NPI 1902890130
Pulmonary Disease physician in San Leandro, California. Individual provider, active in the CMS NPPES registry since September 2, 2005.
## Identity
- **NPI:** 1902890130 (Entity type: Individual)
- **Enumerated:** September 2, 2005
- **Primary specialty:** Internal Medicine - Pulmonary Disease · taxonomy 207RP1001X
- **State license:** G58800 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 13939 E 14TH ST, San Leandro, CA 94578-2601
- **Phone:** (510) 263-3300 · **Fax:** (510) 263-3350
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Puja Thakkar, D.O., Medical Corporation (NPI 1902345747, Danville, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Georgetown University School Of Medicine, class of 1980
## Record status
- **NPPES last updated:** March 25, 2021
- **Other identifiers:** Medicaid CA160376 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1902890130) · Data from the CMS NPPES public registry.