Yongxin Chen, M.D.
Yongxin Chen, M.D. is an Allergy & Immunology Physician in Katy, TX, registered under NPI 1801899737.
Getting there
The practice address on file is 21820 KINGSLAND BLVD #110, Katy, TX 77450. We have not yet mapped what surrounds this office — parking, transit, and nearby pharmacies are added as our data collection reaches each location.
Credentials and Medicare
| Licence | State | Specialty |
|---|---|---|
| K8070 | TX | Allergy & Immunology Physician primary |
This provider holds licence K8070 issued in TX. A licence number in NPPES reflects what was filed at registration — it does not confirm the licence is still active today.
- Status
- Approved
- Provider type
- Practitioner - Allergy/immunology
- PAC ID
- 6608846969
Medicare enrolment is recorded as approved under the provider type Practitioner - Allergy/immunology. This means the provider is enrolled to bill Medicare, though it does not tell you whether they are currently accepting new Medicare patients. Call the office to confirm.
What Allergy & Immunology covers
An allergist-immunologist is trained in evaluation, physical and laboratory diagnosis, and management of disorders involving the immune system. Selected examples of such conditions include asthma, anaphylaxis, rhinitis, eczema, and adverse reactions to drugs, foods, and insect stings as well as immune deficiency diseases (both acquired and congenital), defects in host defense, and problems related to autoimmune disease, organ transplantation, or malignancies of the immune system. NUCC Health Care Provider Taxonomy, code 207K00000X
The taxonomy records how the provider classifies their own practice. It does not confirm which conditions they currently treat, whether they are accepting new patients, or which insurance they take — call the office for that.
Full NPPES record
An NPI-1 identifies a single person. It stays with the clinician for life, even if they move practice or change state, which is why the address on file can lag behind where they actually work today.
| NPI | 1801899737 valid check digit |
|---|---|
| Entity type | Individual (NPI-1) |
| Enumeration date | May 24, 2005 |
| Last updated | Apr 23, 2019 |
| Status | Active |
| Sole proprietor | No |
| Credential | M.D. |
| Practice address |
21820 KINGSLAND BLVD #110 Katy, TX 77450 (281) 578-7922 Fax (281) 578-3175 |
| Mailing address |
12606 W HOUSTON CENTER BLVD STE 260 Houston, TX 77082 |
| Other identifiers |
4206496
· BLE LINK (TX) 7501007 · AETNA PPO (TX) 2220589 · AETNA HMO (TX) 7583192010 · CIGNA HMO (TX) 044758301 (TX) 030004687 · R.R. MEDICARE (TX) 7583192009 · CIGNA PPO (TX) |
Number check
How the check works, step by step
Every NPI carries a Luhn check digit — the same scheme used on credit cards. CMS prefixes the number with 80840 before computing it, which marks it as a US health identifier.
| Digit | 8 | 0 | 8 | 4 | 0 | 1 | 8 | 0 | 1 | 8 | 9 | 9 | 7 | 3 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubled? | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 | — | ×2 |
| Value | 8 | 0 | 8 | 8 | 0 | 2 | 8 | 0 | 1 | 7 | 9 | 9 | 7 | 6 |
Sum = 73 · next multiple of 10 = 80 · check digit = 7 · actual last digit = 7
A valid check digit only means the number is well-formed. It does not mean the provider is licensed, active, or in good standing — those are separate questions answered by the sections above.