Karl Siebert, M.D.
NPI 1205809159 · Glaucoma Specialist (Ophthalmology) Physician · Grand Rapids, MI
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Karl Siebert, M.D. is a Glaucoma Specialist (Ophthalmology) Physician provider in Grand Rapids, MI (NPI 1205809159).
Provider details
- NPI number
- 1205809159
- Entity type
- Individual
- Primary specialty
- Glaucoma Specialist (Ophthalmology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 4301073621 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,667 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 496 | $124 |
| Imaging of Optic Nerve92133 | 244 | $33 |
| Removal of Cataract With Insertion of Prosthetic Lens66984 | 211 | $352 |
| Measurement of Corneal Curvature and Depth of Eye92136 | 205 | $39 |
| Exam of Visual Field With Extended Testing92083 | 200 | $59 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 100 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 1,276 | 414 |
| Timolol Maleate | 893 | 294 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 724 | 217 |
| Prednisolone Acetate | 517 | 296 |
| Bimatoprostbrand: Lumigan | 261 | 76 |
| Brimonidine Tartrate | 240 | 79 |
| Brimonidine Tartrate/Timololbrand: Combigan | 213 | 61 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$195 across 11 records (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
Registry dates
- Enumerated
- 2006-02-10
- Last updated
- 2017-04-12
Frequently asked questions
- What is Karl Siebert's NPI number?
- Karl Siebert's National Provider Identifier (NPI) is 1205809159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karl Siebert's specialty?
- Karl Siebert is listed in the NPPES registry with a primary specialty of Glaucoma Specialist (Ophthalmology) Physician (Allopathic & Osteopathic Physicians).
- Where is Karl Siebert located?
- Karl Siebert's practice location on file with NPPES is 1000 E Paris Ave Se, Grand Rapids, MI 49546-3680.
- What is Karl Siebert's phone number?
- The practice phone number listed in the NPPES registry for Karl Siebert is (616) 949-2001.
- Does Karl Siebert accept Medicare?
- Karl Siebert is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Karl Siebert's NPI active?
- Yes — Karl Siebert's NPI (1205809159) is active in the NPPES registry as of the last update on 2017-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.