MR. DAVID NATHANSON
NPI 1013478676
Internal Medicine in Walnut Creek, CA
About Mr. David Nathanson NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MR. DAVID NATHANSON (NPI 1013478676) is an individual internal medicine provider in Walnut Creek, California, licensed in California (19491) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS and is a graduate of Other (2019).
NPPES Registry Identity
Specialties & Licenses 2
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
Mr. David Nathanson 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 David Nathanson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94598 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALNUT CREEK, CA 94598
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 David Nathanson's NPI number?
The NPI number for David Nathanson is 1013478676. It was assigned to this individual provider in the NPPES registry on March 27, 2019.
Where is David Nathanson located?
David Nathanson practices at 320 Lennon Ln, Walnut Creek, CA 94598. The listed phone number is (925) 906-2000.
What is David Nathanson's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is David Nathanson enrolled in Medicare?
Yes. David Nathanson 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 David Nathanson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Nathanson reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, 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 David Nathanson'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 David Nathanson was last updated on October 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.
# Mr. David Nathanson · NPI 1013478676
Internal Medicine physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since March 27, 2019.
## Identity
- **NPI:** 1013478676 (Entity type: Individual)
- **Enumerated:** March 27, 2019
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 19491 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 320 LENNON LN, Walnut Creek, CA 94598-2419
- **Phone:** (925) 906-2000
## 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:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** October 24, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1013478676) · Data from the CMS NPPES public registry.