Khosrow Mahdavi, MD
NPI 1275536773 · Hematology & Oncology Physician · Costa Mesa, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Khosrow Mahdavi, MD is a Hematology & Oncology Physician provider in Costa Mesa, CA (NPI 1275536773).
Provider details
- NPI number
- 1275536773
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A33589 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Other Service Providers
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,943 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 1,244 | $205 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 383 | $18 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 140 | $146 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 45 | $250 |
| Biopsy and Aspiration of Bone Marrow Sample for Diagnosis38222 | 44 | $206 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 75 | 14 |
| Anastrozole | 51 | 17 |
| Tamoxifen Citrate | 40 | 13 |
| Letrozole | 29 | — |
| Warfarin Sodium | 27 | — |
| Acyclovir | 25 | — |
| Raloxifene Hcl | 25 | — |
| Lenalidomide | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$122 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 520 Superior Ave#315Newport Beach, CA 92663-3637Phone: (949) 642-8566Fax: (866) 235-0746
Registry dates
- Enumerated
- 2005-05-27
- Last updated
- 2023-11-15
- Certified
- 2023-11-15
Frequently asked questions
- What is Khosrow Mahdavi's NPI number?
- Khosrow Mahdavi's National Provider Identifier (NPI) is 1275536773, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Khosrow Mahdavi's specialty?
- Khosrow Mahdavi is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Khosrow Mahdavi located?
- Khosrow Mahdavi's practice location on file with NPPES is 1640 Newport Blvd Ste 400, Costa Mesa, CA 92627-3786.
- What is Khosrow Mahdavi's phone number?
- The practice phone number listed in the NPPES registry for Khosrow Mahdavi is (949) 999-2400.
- Does Khosrow Mahdavi accept Medicare?
- Khosrow Mahdavi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Khosrow Mahdavi's NPI active?
- Yes — Khosrow Mahdavi's NPI (1275536773) is active in the NPPES registry as of the last update on 2023-11-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.