Richard Zelkowitz, M.D.
NPI 1891780805 · Hematology & Oncology Physician · Norwalk, CT
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Richard Zelkowitz, M.D. is a Hematology & Oncology Physician provider in Norwalk, CT (NPI 1891780805).
Provider details
- NPI number
- 1891780805
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 029798 (CT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,101 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 684 | $98 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 366 | $138 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 18 | $241 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 18 | $62 |
| Office Or Other Outpatient Visit for the Evaluation and Management of Established Patient That May Not Require Presence of Healthcare Professional99211 | 15 | $25 |
Typical Medicare-allowed amounts for these services range $25–$241 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Anastrozole | 251 | 99 |
| Exemestane | 74 | 31 |
| Abemaciclibbrand: Verzenio | 74 | 13 |
| Letrozole | 72 | 31 |
| Risedronate Sodium | 39 | 16 |
| Tamoxifen Citrate | 30 | 13 |
| Palbociclibbrand: Ibrance | 22 | — |
| Ribociclib Succinatebrand: Kisqali |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$4,629 across 21 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
- 2005-09-15
- Last updated
- 2011-04-12
Frequently asked questions
- What is Richard Zelkowitz's NPI number?
- Richard Zelkowitz's National Provider Identifier (NPI) is 1891780805, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Richard Zelkowitz's specialty?
- Richard Zelkowitz is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Richard Zelkowitz located?
- Richard Zelkowitz's practice location on file with NPPES is 40 Cross St, Norwalk, CT 06851-4647.
- What is Richard Zelkowitz's phone number?
- The practice phone number listed in the NPPES registry for Richard Zelkowitz is (203) 845-4890.
- Does Richard Zelkowitz accept Medicare?
- Richard Zelkowitz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Richard Zelkowitz's NPI active?
- Yes — Richard Zelkowitz's NPI (1891780805) is active in the NPPES registry as of the last update on 2011-04-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.