Michael Chyu, M.D.
NPI 1558522425 · Internal Medicine Physician · Allentown, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Michael Chyu, M.D. is a Internal Medicine Physician provider in Allentown, PA (NPI 1558522425).
Provider details
- NPI number
- 1558522425
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- MD446388 (PA)
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
18 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
304 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) |
|---|---|---|
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 109 | $24 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 101 | $106 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 52 | $164 |
| Advance Care Planning, First 30 Minutes99497 | 42 | $71 |
Typical Medicare-allowed amounts for these services range $24–$164 (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 · 64 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 240 | 39 |
| Furosemide | 159 | 27 |
| Gabapentin | 156 | 20 |
| Amlodipine Besylate | 151 | 22 |
| Apixabanbrand: Eliquis | 118 | 18 |
| Famotidine | 110 | 17 |
| Metoprolol Tartrate | 99 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$13 across 1 record (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 (2)
- 2166 S 12th StAllentown, PA 18103-8701Phone: (610) 969-0100Fax: (610) 969-0101
- 2500 Bernville RdReading, PA 19605-9453Phone: (610) 378-2000Fax: (610) 378-2799
Registry dates
- Enumerated
- 2008-06-23
- Last updated
- 2023-12-21
- Certified
- 2023-12-21
Frequently asked questions
- What is Michael Chyu's NPI number?
- Michael Chyu's National Provider Identifier (NPI) is 1558522425, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Michael Chyu's specialty?
- Michael Chyu is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Michael Chyu located?
- Michael Chyu's practice location on file with NPPES is 1605 N Cedar Crest Blvd Ste 110b, Allentown, PA 18104-2351.
- What is Michael Chyu's phone number?
- The practice phone number listed in the NPPES registry for Michael Chyu is (610) 973-1410.
- Does Michael Chyu accept Medicare?
- Michael Chyu is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Michael Chyu's NPI active?
- Yes — Michael Chyu's NPI (1558522425) is active in the NPPES registry as of the last update on 2023-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.