Cassandra Sanossian, MD, RD
NPI 1639531692 · Internal Medicine Physician · Uniondale, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Cassandra Sanossian, MD, RD is a Internal Medicine Physician provider in Uniondale, NY (NPI 1639531692).
Provider details
- NPI number
- 1639531692
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, RD
- Sex
- Female
- Sole proprietor
- No
- License
- 293959 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
494 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 Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 203 | $145 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 95 | $103 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 56 | $191 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 43 | $122 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 40 | $285 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 167 | 71 |
| Famotidine | 156 | 64 |
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 60 | 58 |
| Pantoprazole Sodium | 43 | 21 |
| Linaclotidebrand: Linzess | 18 | — |
| Lubiprostone | 16 | — |
| Mesalamine | 13 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-03-28
- Last updated
- 2022-08-23
- Certified
- 2022-08-23
Frequently asked questions
- What is Cassandra Sanossian's NPI number?
- Cassandra Sanossian's National Provider Identifier (NPI) is 1639531692, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cassandra Sanossian's specialty?
- Cassandra Sanossian is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Cassandra Sanossian located?
- Cassandra Sanossian's practice location on file with NPPES is 106 Charles Lindbergh Blvd, Uniondale, NY 11553-3632.
- What is Cassandra Sanossian's phone number?
- The practice phone number listed in the NPPES registry for Cassandra Sanossian is (516) 248-3737.
- Does Cassandra Sanossian accept Medicare?
- Cassandra Sanossian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Cassandra Sanossian's NPI active?
- Yes — Cassandra Sanossian's NPI (1639531692) is active in the NPPES registry as of the last update on 2022-08-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.