FRANCISCUS MARIUS DELEN MD
NPI 1770563041
Internal Medicine - Critical Care Medicine in San Francisco, CA
About Franciscus Marius Delen Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
FRANCISCUS MARIUS DELEN MD (NPI 1770563041) is an individual critical care medicine provider in San Francisco, California, licensed in California (162151) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1992).
NPPES Registry Identity
Specialties & Licenses 3
Other Names 1
Other Identifiers 3
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
Franciscus Marius Delen Md 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 Franciscus Delen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Orinda, CA 94563
- Reassigned Medicare billing, California enrollment
- 4,479 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 2
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 94114 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.
SAN FRANCISCO, CA 94114
SAN FRANCISCO, CA 94114
SAN FRANCISCO, CA 94114
SAN FRANCISCO, CA 94114
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 Franciscus Delen's NPI number?
The NPI number for Franciscus Delen is 1770563041. It was assigned to this individual provider in the NPPES registry on January 20, 2006. The provider is also known as Frank M Delen MD.
Where is Franciscus Delen located?
Franciscus Delen practices at 45 Castro St 200, San Francisco, CA 94114. The listed phone number is (415) 252-1090.
What is Franciscus Delen's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Critical Care Medicine, with taxonomy code 207RC0200X.
Is Franciscus Delen enrolled in Medicare?
Yes. Franciscus Delen 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 Franciscus Delen's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Franciscus Delen reassigns Medicare benefits to Sutter Bay Medical Foundation (Orinda, 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 Franciscus Delen'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 Franciscus Delen was last updated on July 13, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Franciscus Marius Delen, MD · NPI 1770563041
Critical Care Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since January 20, 2006.
## Identity
- **NPI:** 1770563041 (Entity type: Individual)
- **Enumerated:** January 20, 2006
- **Primary specialty:** Internal Medicine - Critical Care Medicine · taxonomy 207RC0200X
- **State license:** 162151 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 45 CASTRO ST, 200, San Francisco, CA 94114-1010
- **Phone:** (415) 252-1090
## 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:** Sutter Bay Medical Foundation (NPI 1366898538, Orinda, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1992
## Record status
- **NPPES last updated:** July 13, 2007
- **Other identifiers:** Medicaid 00G775070 (CA); Medicare ID-Type Unspecified 00G775070; Medicare UPIN H04782
---
Source: [NPI Profile](https://npiprofile.com/npi/1770563041) · Data from the CMS NPPES public registry.