Mark Ashkan, M.D.
NPI 1336375021 · Diagnostic Radiology Physician · Harbor City, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Ashkan, M.D. is a Diagnostic Radiology Physician provider in Harbor City, CA (NPI 1336375021).
Provider details
- NPI number
- 1336375021
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A128351 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
54 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| X-Ray of Chest, 1 View71045 | 42 | $9 |
| X-Ray of Chest, 2 Views71046 | 12 | $11 |
Typical Medicare-allowed amounts for these services range $9–$11 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-06-08
- Last updated
- 2021-12-06
Frequently asked questions
- What is Mark Ashkan's NPI number?
- Mark Ashkan's National Provider Identifier (NPI) is 1336375021, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Ashkan's specialty?
- Mark Ashkan is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Ashkan located?
- Mark Ashkan's practice location on file with NPPES is 25825 Vermont Ave, Harbor City, CA 90710-3518.
- What is Mark Ashkan's phone number?
- The practice phone number listed in the NPPES registry for Mark Ashkan is (510) 717-4999.
- Does Mark Ashkan accept Medicare?
- Mark Ashkan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Ashkan's NPI active?
- Yes — Mark Ashkan's NPI (1336375021) is active in the NPPES registry as of the last update on 2021-12-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.