AMMAR CHARESTAN M.D.
NPI 1295181543
Family Medicine in San Diego, CA
About Ammar Charestan M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
AMMAR CHARESTAN M.D. (NPI 1295181543) is an individual family medicine provider in San Diego, California, licensed in California (A166970) and active in the NPI registry since May 2016. He is enrolled in Medicare PECOS, maintains a secondary practice location in Detroit, and is a graduate of Other (2010).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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
Ammar Charestan 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
9Medicare enrollment records show Ammar Charestan reassigns Medicare billing to 9 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- 51 clinicians in this Medicare group
San Diego, CA 92108
- Reassigned Medicare billing, California enrollment
- 13,921 clinicians in this Medicare group
San Diego, CA 92123
- Reassigned Medicare billing, California enrollment
- 78 clinicians in this Medicare group
San Diego, CA 92111
- Reassigned Medicare billing, California enrollment
- 1,233 clinicians in this Medicare group
El Cajon, CA 92021
- Reassigned Medicare billing, California enrollment
- 4 clinicians in this Medicare group
Escondido, CA 92025
- Reassigned Medicare billing, California enrollment
- 332 clinicians in this Medicare group
Temecula, CA 92592
- Reassigned Medicare billing, California enrollment
- 2,584 clinicians in this Medicare group
Murrieta, CA 92563
- Reassigned Medicare billing, California enrollment
- 455 clinicians in this Medicare group
Detroit, MI 48234
- Reassigned Medicare billing, Michigan enrollment
- 5 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 5
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 92101 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Ammar Charestan's NPI number?
The NPI number for Ammar Charestan is 1295181543. It was assigned to this individual provider in the NPPES registry on May 5, 2016. The provider is also known as Ammar Abdulmassih Charestan M.D..
Where is Ammar Charestan located?
Ammar Charestan practices at 300 Fir St Fl 1, San Diego, CA 92101. The listed phone number is (619) 446-1575.
What is Ammar Charestan's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Ammar Charestan enrolled in Medicare?
Yes. Ammar Charestan 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 Ammar Charestan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ammar Charestan reassigns Medicare benefits to 9 organizations: San Diego American Indian Health Center (San Diego, CA), Southern California Permanente Medical Group (San Diego, CA), Focus On Health Inc (San Diego, CA), Sharp Rees-Stealy Medical Group, Inc (San Diego, CA), East County Urgent Care Industrial & Medical Clinic Inc (El Cajon, CA) and 4 more organizations, 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 Ammar Charestan'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 Ammar Charestan was last updated on August 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Ammar Charestan, M.D. · NPI 1295181543
Family Medicine physician in San Diego, California. Individual provider, active in the CMS NPPES registry since May 5, 2016.
## Identity
- **NPI:** 1295181543 (Entity type: Individual)
- **Enumerated:** May 5, 2016
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** A166970 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 FIR ST FL 1, San Diego, CA 92101-2393
- **Phone:** (619) 446-1575
## 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:** 9 organizations under Medicare reassignment (form CMS-855R): San Diego American Indian Health Center (NPI 1003902917, San Diego, CA); Southern California Permanente Medical Group (NPI 1023425972, San Diego, CA); Focus On Health Inc (NPI 1497450530, San Diego, CA); Sharp Rees-Stealy Medical Group, Inc (NPI 1285616177, San Diego, CA); East County Urgent Care Industrial & Medical Clinic Inc (NPI 1417988668, El Cajon, CA); and 4 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2010
## Record status
- **NPPES last updated:** August 13, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1295181543) · Data from the CMS NPPES public registry.