DR. AARON DANIEL TWARD M.D. PH.D.
NPI 1194921205
Otolaryngology in San Francisco, CA
About Dr. Aaron Daniel Tward M.d. Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. AARON DANIEL TWARD M.D. PH.D. (NPI 1194921205) is an individual otolaryngology provider in San Francisco, California, licensed in California (A133557) and active in the NPI registry since June 2007. He is enrolled in Medicare PECOS, maintains a secondary practice location in San Francisco, and is a graduate of University Of California, San Francisco School Of Medicine (2007).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Location 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
Dr. Aaron Daniel Tward M.d. Ph.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
3Medicare enrollment records show Aaron Tward reassigns Medicare billing to 3 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 94122
- Reassigned Medicare billing, California enrollment
- 5,544 clinicians in this Medicare group
San Francisco, CA 94110
- Reassigned Medicare billing, California enrollment
- 637 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 94115 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 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAN FRANCISCO, CA 94115
SAN FRANCISCO, CA 94115
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 Aaron Tward's NPI number?
The NPI number for Aaron Tward is 1194921205. It was assigned to this individual provider in the NPPES registry on June 25, 2007.
Where is Aaron Tward located?
Aaron Tward practices at 2233 Post St, San Francisco, CA 94115. The listed phone number is (617) 353-2757.
What is Aaron Tward's specialty?
The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.
Is Aaron Tward enrolled in Medicare?
Yes. Aaron Tward 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 Aaron Tward's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Tward reassigns Medicare benefits to 3 organizations: University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and University Of California Sfgh Medical Group (San Francisco, 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 Aaron Tward'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 Aaron Tward was last updated on June 22, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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. Aaron Daniel Tward, M.D. PH.D. · NPI 1194921205
Otolaryngology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since June 25, 2007.
## Identity
- **NPI:** 1194921205 (Entity type: Individual)
- **Enumerated:** June 25, 2007
- **Primary specialty:** Otolaryngology · taxonomy 207Y00000X
- **State license:** A133557 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 2233 POST ST, San Francisco, CA 94115-3470
- **Phone:** (617) 353-2757
## 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:** 3 organizations under Medicare reassignment (form CMS-855R): University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); University Of California Sfgh Medical Group (NPI 1356696215, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 2007
## Record status
- **NPPES last updated:** June 22, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1194921205) · Data from the CMS NPPES public registry.