Michael Cheng, DO
NPI 1003109513 · Rheumatology Physician · Orange, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Cheng, DO is a Rheumatology Physician provider in Orange, CA (NPI 1003109513).
Provider details
- NPI number
- 1003109513
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A12483 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
571 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 | 178 | $146 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 138 | $205 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 85 | $103 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 39 | $144 |
| 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 | 37 | $18 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 36 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 97 | 35 |
| Hydroxychloroquine Sulfate | 93 | 28 |
| Methotrexate Sodiumbrand: Methotrexate | 84 | 19 |
| Colchicine | 62 | 17 |
| Celecoxib | 60 | 12 |
| Meloxicam | 46 | 11 |
| Adalimumabbrand: Humira(cf) Pen | 44 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,038 across 5 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
Additional practice locations (1)
- 5572 Sweet Gum CtChino Hills, CA 91709-4584Phone: (909) 217-8423
Registry dates
- Enumerated
- 2011-05-17
- Last updated
- 2019-06-28
Frequently asked questions
- What is Michael Cheng's NPI number?
- Michael Cheng's National Provider Identifier (NPI) is 1003109513, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Cheng's specialty?
- Michael Cheng is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Cheng located?
- Michael Cheng's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Michael Cheng's phone number?
- The practice phone number listed in the NPPES registry for Michael Cheng is (714) 456-7110.
- Does Michael Cheng accept Medicare?
- Michael Cheng is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Cheng's NPI active?
- Yes — Michael Cheng's NPI (1003109513) is active in the NPPES registry as of the last update on 2019-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.