GRACE DAMMANN M.D.
NPI 1558406736
Internal Medicine in Mill Valley, CA
About Grace Dammann M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRACE DAMMANN M.D. (NPI 1558406736) is an individual internal medicine provider in Mill Valley, California, licensed in California (G63041) and active in the NPI registry since February 2007. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (1986).
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
Grace Dammann 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 Grace Dammann reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
San Francisco, CA 94133
- Reassigned Medicare billing, California enrollment
- 1,573 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 94941 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.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
MILL VALLEY, CA 94941
MILL VALLEY, CA 94941
MILL VALLEY, CA 94941
MILL VALLEY, CA 94941
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 Grace Dammann's NPI number?
The NPI number for Grace Dammann is 1558406736. It was assigned to this individual provider in the NPPES registry on February 21, 2007.
Where is Grace Dammann located?
Grace Dammann practices at 655 Redwood Hwy 200, Mill Valley, CA 94941. The listed phone number is (415) 383-6623.
What is Grace Dammann's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Grace Dammann enrolled in Medicare?
Yes. Grace Dammann 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 Grace Dammann's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grace Dammann reassigns Medicare benefits to City & County Of San Francisco (San Francisco, 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 Grace Dammann'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 Grace Dammann was last updated on July 8, 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.
# Grace Dammann, M.D. · NPI 1558406736
Internal Medicine physician in Mill Valley, California. Individual provider, active in the CMS NPPES registry since February 21, 2007.
## Identity
- **NPI:** 1558406736 (Entity type: Individual)
- **Enumerated:** February 21, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** G63041 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 655 REDWOOD HWY, 200, Mill Valley, CA 94941-3034
- **Phone:** (415) 383-6623
## 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:** City & County Of San Francisco (NPI 1023579356, San Francisco, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 1986
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicare UPIN E41443 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1558406736) · Data from the CMS NPPES public registry.