Mark Tannenbaum, MD
NPI 1285613273 · Ophthalmology Physician · Waterbury, CT
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Tannenbaum, MD is a Ophthalmology Physician provider in Waterbury, CT (NPI 1285613273).
Provider details
- NPI number
- 1285613273
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 64133 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
218 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 Problem Focused Exam of Visual System92012 | 123 | $54 |
| New Patient Problem Focused Exam of Visual System92002 | 48 | $48 |
| Exam of the Internal Drainage System of Eye92020 | 21 | $22 |
| Exam of Visual Field With Extended Testing92083 | 15 | $29 |
| Imaging of Optic Nerve92133 | 11 | $23 |
Typical Medicare-allowed amounts for these services range $22–$54 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 67 | 34 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 25 | — |
| Methazolamide | 18 | — |
| Brimonidine Tartrate/Timololbrand: Combigan | 11 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (2)
- 749 61st St Fl 6Brooklyn, NY 11220-5162Phone: (718) 362-6311Fax: (718) 362-6312
- 94 BoweryNew York, NY 10013-4888Phone: (212) 335-0328Fax: (212) 335-0320
Registry dates
- Enumerated
- 2006-01-10
- Last updated
- 2024-02-07
- Certified
- 2024-02-07
Frequently asked questions
- What is Mark Tannenbaum's NPI number?
- Mark Tannenbaum's National Provider Identifier (NPI) is 1285613273, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Tannenbaum's specialty?
- Mark Tannenbaum is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Tannenbaum located?
- Mark Tannenbaum's practice location on file with NPPES is 87 Grandview Ave, Waterbury, CT 06708-2514.
- What is Mark Tannenbaum's phone number?
- The practice phone number listed in the NPPES registry for Mark Tannenbaum is (203) 574-2020.
- Does Mark Tannenbaum accept Medicare?
- Mark Tannenbaum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Tannenbaum's NPI active?
- Yes — Mark Tannenbaum's NPI (1285613273) is active in the NPPES registry as of the last update on 2024-02-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.