Tommy Chiou, MD
NPI 1023700242 · Internal Medicine Physician · Chicago, IL
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tommy Chiou, MD is a Internal Medicine Physician provider in Chicago, IL (NPI 1023700242).
Provider details
- NPI number
- 1023700242
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 125.082045 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 19 | — |
| Amlodipine Besylate | 17 | — |
| Atorvastatin Calcium | 16 | 11 |
| Rosuvastatin Calcium | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-05-25
- Last updated
- 2023-05-25
- Certified
- 2023-05-25
Frequently asked questions
- What is Tommy Chiou's NPI number?
- Tommy Chiou's National Provider Identifier (NPI) is 1023700242, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tommy Chiou's specialty?
- Tommy Chiou is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tommy Chiou located?
- Tommy Chiou's practice location on file with NPPES is 5841 S Maryland Ave Ste Mc7082, Chicago, IL 60637-1465.
- What is Tommy Chiou's phone number?
- The practice phone number listed in the NPPES registry for Tommy Chiou is (773) 702-6840.
- Does Tommy Chiou accept Medicare?
- Tommy Chiou is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tommy Chiou's NPI active?
- Yes — Tommy Chiou's NPI (1023700242) is active in the NPPES registry as of the last update on 2023-05-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.