Christina Ma, M.D.
NPI 1891052742 · Diagnostic Radiology Physician · Santa Ana, CA
Enrolled with Medicare as Practitioner - Diagnostic Radiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christina Ma, M.D. is a Diagnostic Radiology Physician provider in Santa Ana, CA (NPI 1891052742).
Provider details
- NPI number
- 1891052742
- Entity type
- Individual
- Primary specialty
- Diagnostic Radiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A129287 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,056 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) |
|---|---|---|
| Complete Ultrasound Scan of Abdomen76700 | 262 | $131 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 131 | $220 |
| Complete Ultrasound Scan Behind Abdominal Cavity76770 | 75 | $124 |
| Limited Ultrasound Scan Behind Abdominal Cavity76775 | 68 | $66 |
| Ct Scan of Chest Without Contrast71250 | 60 | $148 |
| Ct Scan of Abdomen and Pelvis Before and After Contrast74178 | 56 | $405 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 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
Registry dates
- Enumerated
- 2012-04-17
- Last updated
- 2025-11-17
- Certified
- 2025-11-17
Frequently asked questions
- What is Christina Ma's NPI number?
- Christina Ma's National Provider Identifier (NPI) is 1891052742, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christina Ma's specialty?
- Christina Ma is listed in the NPPES registry with a primary specialty of Diagnostic Radiology Physician (Allopathic & Osteopathic Physicians).
- Where is Christina Ma located?
- Christina Ma's practice location on file with NPPES is 1100 N Tustin Ave Ste E, Santa Ana, CA 92705-3509.
- What is Christina Ma's phone number?
- The practice phone number listed in the NPPES registry for Christina Ma is (310) 267-8797.
- Does Christina Ma accept Medicare?
- Christina Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christina Ma's NPI active?
- Yes — Christina Ma's NPI (1891052742) is active in the NPPES registry as of the last update on 2025-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.