Quick answers
- Does Harriette Canellos accept Medicare assignment?
- Medicare's clinician data says Harriette Canellos may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Harriette Canellos see?
- In 2024, CMS data shows 100 Original Medicare patients and 330 services for Harriette Canellos. This counts Original Medicare only and measures volume, not quality.
- What is Harriette Canellos's NPI number?
- 1831155407. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Harriette Canellos, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 100 |
|---|---|
| Services billed to Medicare | 330 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)115 services
- Analysis of substance using immunoassay technique, multiple step method (83516)48 services
- Closure of tear duct opening using plug (68761)34 services
- Microfluid analysis of tears (83861)31 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)28 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol70%
- High blood pressure66%
- Arthritis59%
- Osteoporosis29%
- Ischemic heart disease27%
- Depression27%
Practice locations
Addresses where Harriette Canellos is enrolled with Medicare (CMS data updated October 2, 2026).
- 33 W 42nd StNew York, NY 10036 (212) 938‑4001
Group practices
Medicare enrollment lists Harriette Canellos as a member of this group (CMS data updated October 2, 2026).
- State of New York Comptrollers Office170 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in New York
Clinicians with the same Medicare primary specialty in New York, NY — not a recommendation.
Other clinicians in State of New York Comptrollers Office
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Graduation year | 1992 (34 years since optometry school) |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1831155407 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians