DR. MARK G. BIRKMANN (O.D.) – Optometrist, NPI 1609880889
Optometrist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
863 OPTOMETRY in MO
Provider Addresses for DR. MARK G. BIRKMANN (O.D.)
320 Washington Ave
Washington, MO 630903218
Phone: (636) 239-2179
Type: Location
135, West University Avenue, Historic Georgetown, Georgetown, Williamson County, Texas, 78626, United States
GEORGETOWN, TX 786285359
Phone: (512) 869-8821
Fax: (512) 869-8849
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2017-12-12
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20171212001250 | I | Optometry | TX | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 92014 | Established patient complete exam of visual system | 126 | 125 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 116 | 80 | $0 |
| 92250 | Photography of the retina | 82 | 71 | $0 |
| 92020 | Exam of the internal drainage system of eye | 61 | 52 | $0 |
| 92083 | Exam of visual field with extended testing | 61 | 52 | $0 |
Insurance plans in this area (ZIP 63090)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPTOMETRY | MO | 92083 | Measurement of field of vision during daylight conditions | 21 | 19 |
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