DR. TAMER ADEL OTHMAN M.D.
NPI 1316471980
Internal Medicine - Hematology in Irvine, CA
About Dr. Tamer Adel Othman M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. TAMER ADEL OTHMAN M.D. (NPI 1316471980) is an individual hematology provider in Irvine, California, licensed in California (A158324) and active in the NPI registry since April 2017. He is enrolled in Medicare PECOS, maintains a secondary practice location in Huntington Beach, and is a graduate of Rush Medical College Of Rush University (2017).
NPPES Registry Identity
Specialties & Licenses 2
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. Tamer Adel Othman 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
4Medicare enrollment records show Tamer Othman reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Duarte, CA 91010
- Reassigned Medicare billing, California enrollment
- 1,335 clinicians in this Medicare group
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
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92618 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.
IRVINE, CA 92618
IRVINE, CA 92618
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 Tamer Othman's NPI number?
The NPI number for Tamer Othman is 1316471980. It was assigned to this individual provider in the NPPES registry on April 20, 2017.
Where is Tamer Othman located?
Tamer Othman practices at 1000 Fivepoint, Irvine, CA 92618. The listed phone number is (800) 826-4673.
What is Tamer Othman's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology, with taxonomy code 207RH0000X.
Is Tamer Othman enrolled in Medicare?
Yes. Tamer Othman 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 Tamer Othman's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Tamer Othman reassigns Medicare benefits to 4 organizations: City Of Hope Medical Foundation (Duarte, CA), Regents Of The University Of California (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (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 Tamer Othman'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 Tamer Othman was last updated on November 3, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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. Tamer Adel Othman, M.D. · NPI 1316471980
Hematology physician in Irvine, California. Individual provider, active in the CMS NPPES registry since April 20, 2017.
## Identity
- **NPI:** 1316471980 (Entity type: Individual)
- **Enumerated:** April 20, 2017
- **Primary specialty:** Internal Medicine - Hematology · taxonomy 207RH0000X
- **State license:** A158324 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1000 FIVEPOINT, Irvine, CA 92618-2621
- **Phone:** (800) 826-4673
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): City Of Hope Medical Foundation (NPI 1871886366, Duarte, CA); Regents Of The University Of California (NPI 1376613943, San Francisco, CA); University Of California San Francisco (NPI 1346329380, San Francisco, CA); Ucsf Medical Group Business Services (NPI 1477624104, San Francisco, CA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Rush Medical College Of Rush University, class of 2017
## Record status
- **NPPES last updated:** November 3, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1316471980) · Data from the CMS NPPES public registry.