NATHAN HAMBURGER (MD) – Ophthalmology Physician, NPI 1336300458
Ophthalmology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
396 OPHTHALMOLOGY in CO
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Provider Addresses for NATHAN HAMBURGER (MD)
Sakura House, 1255, 19th Street, Central Business District, Denver, Denver County, Colorado, 80202, United States
SUITE 101
DENVER, CO 802021459
Phone: (303) 293-9311
Fax: (303) 293-8028
Mailing address matches the actual address.
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: 2012-05-31
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 |
|---|---|---|---|---|
| I20120531000460 | I | Ophthalmology | CO | 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 | 353 | 342 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 309 | 165 | $0 |
| 92250 | Photography of the retina | 216 | 209 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 216 | 174 | $0 |
| 92004 | New patient complete exam of visual system | 149 | 149 | $0 |
Insurance plans in this area (ZIP 80202)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| OPHTHALMOLOGY | CO | 92012 | Eye and medical examination for diagnosis and treatment, established patient | 21 | 21 |
| OPHTHALMOLOGY | CO | 92083 | Measurement of field of vision during daylight conditions | 71 | 71 |
| OPHTHALMOLOGY | CO | 92134 | Diagnostic imaging of retina | 22 | 21 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| O P H T H A L M O L O G Y | CO | |
| O P H T H A L M O L O G Y | CO | |
| Ophthalmology, Pediatric Medicine | CO | |
| Physician Assistant | CO |
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