Peter Ma, M.D.
NPI 1902831019 · Internal Medicine Physician · Arcadia, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Ma, M.D. is a Internal Medicine Physician provider in Arcadia, CA (NPI 1902831019).
Provider details
- NPI number
- 1902831019
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- A53050 (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
19 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
4,096 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) |
|---|---|---|
| Chronic Care Management Services for Two Or More Chronic Conditions, First 30 Minutes Provided Personally By Health Care Professional, Per Calendar Month99491 | 1,316 | $90 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 883 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 870 | $138 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 216 | $17 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 172 | $140 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 158 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 1,295 | 277 |
| Rosuvastatin Calcium | 1,273 | 313 |
| Atorvastatin Calcium | 982 | 259 |
| Losartan Potassium | 926 | 252 |
| Metformin Hcl | 741 | 179 |
| Olmesartan Medoxomil | 523 | 117 |
| Tamsulosin Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$575 across 28 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
- 2006-07-11
- Last updated
- 2023-06-01
- Certified
- 2023-06-01
Frequently asked questions
- What is Peter Ma's NPI number?
- Peter Ma's National Provider Identifier (NPI) is 1902831019, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Ma's specialty?
- Peter Ma is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Ma located?
- Peter Ma's practice location on file with NPPES is 624 W Duarte Rd Ste 208, Arcadia, CA 91007-7675.
- What is Peter Ma's phone number?
- The practice phone number listed in the NPPES registry for Peter Ma is (626) 294-9978.
- Does Peter Ma accept Medicare?
- Peter Ma is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Ma's NPI active?
- Yes — Peter Ma's NPI (1902831019) is active in the NPPES registry as of the last update on 2023-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.