Marc Ma, M.D.
NPI 1740500313 · Family Medicine Physician · Rowland Heights, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Ma, M.D. is a Family Medicine Physician provider in Rowland Heights, CA (NPI 1740500313).
Provider details
- NPI number
- 1740500313
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- BP10036754 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
16 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
312 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 218 | $138 |
| Advance Care Planning, First 30 Minutes99497 | 30 | $87 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 21 | $140 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $99 |
| Annual Wellness Visit; Includes a Personalized Prevention Plan of Service (pps), Initial VisitG0438 | 13 | $177 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 457 | 159 |
| Amlodipine Besylate | 150 | 46 |
| Losartan Potassium | 147 | 48 |
| Fluticasone Propionate | 125 | 57 |
| Alendronate Sodium | 113 | 43 |
| Famotidine | 84 | 39 |
| Metformin Hcl | 73 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$467 across 8 records (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
- 2010-06-07
- Last updated
- 2022-07-14
- Certified
- 2022-07-14
Frequently asked questions
- What is Marc Ma's NPI number?
- Marc Ma's National Provider Identifier (NPI) is 1740500313, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Ma's specialty?
- Marc Ma is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Ma located?
- Marc Ma's practice location on file with NPPES is 1818 Sierra Leone Ave Ste E, Rowland Heights, CA 91748-3696.
- What is Marc Ma's phone number?
- The practice phone number listed in the NPPES registry for Marc Ma is (626) 600-8066.
- Does Marc Ma accept Medicare?
- Marc Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Ma's NPI active?
- Yes — Marc Ma's NPI (1740500313) is active in the NPPES registry as of the last update on 2022-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.