Negar Knowles, MD
NPI 1528260411 · Diagnostic Radiology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Negar Knowles, MD is a Diagnostic Radiology Physician provider in San Diego, CA (NPI 1528260411).
Provider details
- NPI number
- 1528260411
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 4301091679 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
90 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 | 41 | $9 |
| X-Ray of Chest, 2 Views71046 | 21 | $11 |
| Ct Scan of Chest Without Contrast71250 | 15 | $52 |
| Ct Scan of Blood Vessels of Chest With Contrast71275 | 13 | $87 |
Typical Medicare-allowed amounts for these services range $9–$87 (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
- 2007-06-03
- Last updated
- 2021-11-29
Frequently asked questions
- What is Negar Knowles's NPI number?
- Negar Knowles's National Provider Identifier (NPI) is 1528260411, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Negar Knowles's specialty?
- Negar Knowles is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Negar Knowles located?
- Negar Knowles's practice location on file with NPPES is 4647 Zion Ave, San Diego, CA 92120-2507.
- What is Negar Knowles's phone number?
- The practice phone number listed in the NPPES registry for Negar Knowles is (619) 528-5000.
- Does Negar Knowles accept Medicare?
- Negar Knowles is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Negar Knowles's NPI active?
- Yes — Negar Knowles's NPI (1528260411) is active in the NPPES registry as of the last update on 2021-11-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.