Pei-Jing Ma, PA
NPI 1912989591 · Physician Assistant · Fullerton, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Pei-Jing Ma, PA is a Physician Assistant provider in Fullerton, CA (NPI 1912989591).
Provider details
- NPI number
- 1912989591
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Female
- Sole proprietor
- Yes
- License
- PA16930 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
377 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 272 | $150 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 65 | $104 |
| Critical Care, First 30-74 Minutes99291 | 40 | $184 |
Typical Medicare-allowed amounts for these services range $104–$184 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 28 | 26 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 27 | 27 |
| Ibuprofen | 26 | 25 |
| Ondansetronbrand: Ondansetron Odt | 25 | 24 |
| Cefdinir | 20 | 19 |
| Azithromycin | 20 | 20 |
| Tramadol Hcl | 16 | 16 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-11-18
- Last updated
- 2009-09-18
Frequently asked questions
- What is Pei-Jing Ma's NPI number?
- Pei-Jing Ma's National Provider Identifier (NPI) is 1912989591, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Pei-Jing Ma's specialty?
- Pei-Jing Ma is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Pei-Jing Ma located?
- Pei-Jing Ma's practice location on file with NPPES is 101 E Valencia Mesa Dr, Fullerton, CA 92835-3809.
- What is Pei-Jing Ma's phone number?
- The practice phone number listed in the NPPES registry for Pei-Jing Ma is (714) 992-3965.
- Does Pei-Jing Ma accept Medicare?
- Pei-Jing Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Pei-Jing Ma's NPI active?
- Yes — Pei-Jing Ma's NPI (1912989591) is active in the NPPES registry as of the last update on 2009-09-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.