Dr. Mark G. Birkmann, O.D.
Dr. Mark G. Birkmann is a Optometrist provider (Optometrist) practicing in Georgetown, TX, registered in the NPPES registry with NPI 1609880889 since 2006. The credential OD stands for Doctor of Optometry.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1609880889 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Mark G. Birkmann |
| Credential | O.D. |
| Sex | Male |
| Practice address | Georgetown, TX, 78628 |
| Phone | 5128698821 |
| Fax | 5128698849 |
| Enumeration date | 2006-07-27 |
| Last updated in NPPES | 2018-03-17 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 152W00000X | Optometrist | Primary | 9137TG | TX |
OD — Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential
Copy-ready billing details
Provider: Mark Birkmann, O.D. NPI: 1609880889 Taxonomy: 152W00000X (Optometrist) Address: Georgetown, TX, 78628
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1962921825 | Birkmann Optical LLC | Organization | Optometrist | Georgetown, TX |
| 1528587482 | Birkmann Eye Associates Pllc | Organization | Optometrist | Georgetown, TX |
Verify this record
Cross-check NPI 1609880889 against the authoritative CMS record: view Dr. Mark G. Birkmann on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-03-17.