AMAN CHAUHAN MD
NPI 1902193147
Internal Medicine - Medical Oncology in San Francisco, CA
About Aman Chauhan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMAN CHAUHAN MD (NPI 1902193147) is an individual medical oncology provider in San Francisco, California, licensed in California (C204071) and active in the NPI registry since July 2011. He is enrolled in Medicare PECOS and is a graduate of Other (2010).
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
Aman Chauhan 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 Reassignments
5Medicare enrollment records show Aman Chauhan 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
- 2,112 clinicians in this Medicare group
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
Lexington, KY 40517
- Reassigned Medicare billing, Kentucky enrollment
- 1,502 clinicians in this Medicare group
Naples, FL 34103
- Reassigned Medicare billing, Florida enrollment
- 3,639 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 4
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.
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 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
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 Aman Chauhan's NPI number?
The NPI number for Aman Chauhan is 1902193147. It was assigned to this individual provider in the NPPES registry on July 8, 2011.
Where is Aman Chauhan located?
Aman Chauhan practices at 1825 4th St Fl 4, San Francisco, CA 94143. The listed phone number is (415) 353-9888.
What is Aman Chauhan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Medical Oncology, with taxonomy code 207RX0202X.
Is Aman Chauhan enrolled in Medicare?
Yes. Aman Chauhan 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 Aman Chauhan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Aman Chauhan reassigns Medicare benefits to 5 organizations: Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA), Kentucky Medical Services Foundation, Inc (Lexington, KY) and University Of Miami (Naples, FL). 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 Aman Chauhan'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 Aman Chauhan was last updated on December 4, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.
# Aman Chauhan, MD · NPI 1902193147
Medical Oncology physician in San Francisco, California. Individual provider, active in the CMS NPPES registry since July 8, 2011.
## Identity
- **NPI:** 1902193147 (Entity type: Individual)
- **Enumerated:** July 8, 2011
- **Primary specialty:** Internal Medicine - Medical Oncology · taxonomy 207RX0202X
- **State license:** C204071 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1825 4TH ST FL 4, San Francisco, CA 94143-2350
- **Phone:** (415) 353-9888
## 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): Regents Of The University Of California (NPI 1235322348, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA); Kentucky Medical Services Foundation, Inc (NPI 1326091448, Lexington, KY); University Of Miami (NPI 1295279586, Naples, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** December 4, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1902193147) · Data from the CMS NPPES public registry.