AMMARA TARIQ GILL MD
NPI 1447482096
Internal Medicine - Hematology & Oncology in Walnut Creek, CA
About Ammara Tariq Gill Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMMARA TARIQ GILL MD (NPI 1447482096) is an individual hematology & oncology provider in Walnut Creek, California, licensed in California (A154333) and active in the NPI registry since August 2009. She is enrolled in Medicare PECOS, is affiliated with Box Butte General Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Locations 2
Accepted Insurance
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
Ammara Tariq Gill 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
6Medicare enrollment records show Ammara Gill reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Walnut Creek, CA 94597
- Reassigned Medicare billing, California enrollment
- 650 clinicians in this Medicare group
Napa, CA 94558
- Reassigned Medicare billing, California enrollment
- 1,699 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 2,570 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 918 clinicians in this Medicare group
Mitchell, NE 69357
- Reassigned Medicare billing, Nebraska and California enrollments
- Also billed through NPI 1306910534 (California)
- 208 clinicians in this Medicare group
Hemingford, NE 69348
- Reassigned Medicare billing, Nebraska enrollment
- Also billed through NPI 1811929060 (Nebraska)
- 104 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Box Butte General Hospital
Critical Access Hospitals · Alliance, NEPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94598 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 15
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
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 Ammara Gill's NPI number?
The NPI number for Ammara Gill is 1447482096. It was assigned to this individual provider in the NPPES registry on August 16, 2009. The provider is also known as Ammara Hassan Tahir.
Where is Ammara Gill located?
Ammara Gill practices at 177 La Casa Via Ste 390, Walnut Creek, CA 94598. The listed phone number is (925) 692-5610.
What is Ammara Gill's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Ammara Gill enrolled in Medicare?
Yes. Ammara Gill 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 Ammara Gill's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ammara Gill reassigns Medicare benefits to 6 organizations: John Muir Physician Network (Walnut Creek, CA), Providence Medical Foundation (Napa, CA), Regents Of The Univ Of Ca (Davis, CA), Regents Of The University Of California (Davis, CA), Regional West Physicians Clinic (Mitchell, NE) and 1 more organization, listed in the Medicare section above. 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 Ammara Gill's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Ammara Gill accept?
Health plans from Blue Cross and Blue Shield of Nebraska, Oscar Insurance Company and UnitedHealthcare list Ammara Gill as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Ammara Gill affiliated with any hospitals?
According to CMS data, Ammara Gill is affiliated with Box Butte General Hospital.
When was this NPI record last updated?
The NPPES record for Ammara Gill was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Ammara Tariq Gill, MD · NPI 1447482096
Hematology & Oncology physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since August 16, 2009.
## Identity
- **NPI:** 1447482096 (Entity type: Individual)
- **Enumerated:** August 16, 2009
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** A154333 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 177 LA CASA VIA STE 390, Walnut Creek, CA 94598-6101
- **Phone:** (925) 692-5610
## 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:** 6 organizations under Medicare reassignment (form CMS-855R): John Muir Physician Network (NPI 1841407665, Walnut Creek, CA); Providence Medical Foundation (NPI 1205131950, Napa, CA); Regents Of The Univ Of Ca (NPI 1053304071, Davis, CA); Regents Of The University Of California (NPI 1912987553, Davis, CA); Regional West Physicians Clinic (NPI 1992703425, Mitchell, NE); and 1 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** April 17, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1447482096) · Data from the CMS NPPES public registry.