DR. NATHAN A TEISMANN M.D.
NPI 1548459282
Emergency Medicine in San Francisco, CA
About Dr. Nathan A Teismann M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. NATHAN A TEISMANN M.D. (NPI 1548459282) is an individual emergency medicine provider in San Francisco, California, licensed in California (A95888) and active in the NPI registry since October 2007. He is enrolled in Medicare PECOS and is a graduate of University Of Chicago, Pritzker School Of Medicine (2004).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Nathan A Teismann 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 Reassignments
5Medicare enrollment records show Nathan Teismann reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Francisco, CA 94143
- Reassigned Medicare billing, California enrollment
- 5,645 clinicians in this Medicare group
San Francisco, CA 94109
- Reassigned Medicare billing, California enrollment
- 155 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 842 clinicians in this Medicare group
Petaluma, CA 94954
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1720695547 (California)
- 30 clinicians in this Medicare group
Sonoma, CA 95476
- Reassigned Medicare billing, California enrollment
- 112 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 6
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 94143 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 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
SAN FRANCISCO, CA 94143
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 Nathan Teismann's NPI number?
The NPI number for Nathan Teismann is 1548459282. It was assigned to this individual provider in the NPPES registry on October 18, 2007.
Where is Nathan Teismann located?
Nathan Teismann practices at 505 Parnassus Ave Ucsf Dept Of Emergency Medicine L-126, San Francisco, CA 94143. The listed phone number is (415) 609-8195.
What is Nathan Teismann's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Nathan Teismann enrolled in Medicare?
Yes. Nathan Teismann 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 organizations bill Medicare for Nathan Teismann's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Nathan Teismann reassigns Medicare benefits to 5 organizations: University Of California San Francisco (San Francisco, CA), San Francisco Emergency Medical Associates (San Francisco, CA), University Of California Sfgh Medical Group (San Francisco, CA), Norcal Healthconnect LLC (Petaluma, CA) and Sonoma Valley Emergency Physicians Medical Group, Inc (Sonoma, CA). Each 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 Nathan Teismann'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 Nathan Teismann was last updated on January 13, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Dr. Nathan A Teismann, M.D. · NPI 1548459282
Emergency Medicine physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since October 18, 2007.
## Identity
- **NPI:** 1548459282 (Entity type: Individual)
- **Enumerated:** October 18, 2007
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A95888 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 505 PARNASSUS AVE, UCSF DEPT OF EMERGENCY MEDICINE L-126, San Francisco, CA 94143-0208
- **Phone:** (415) 609-8195
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); San Francisco Emergency Medical Associates (NPI 1134110661, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1174598296, San Francisco, CA); Norcal Healthconnect LLC (NPI 1235162645, Petaluma, CA); Sonoma Valley Emergency Physicians Medical Group, Inc (NPI 1710164629, Sonoma, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 2004
## Record status
- **NPPES last updated:** January 13, 2011
---
Source: [NPI Profile](https://npiprofile.com/npi/1548459282) · Data from the CMS NPPES public registry.