Siayareh Rambally, M.D.
NPI 1811142581 · Hematology & Oncology Physician · Dallas, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siayareh Rambally, M.D. is a Hematology & Oncology Physician provider in Dallas, TX (NPI 1811142581).
Provider details
- NPI number
- 1811142581
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- N5959 (TX)
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 tenure25% of score
17 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
109 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 | 59 | $125 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 29 | $95 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 21 | $127 |
Typical Medicare-allowed amounts for these services range $95–$127 (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 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydroxyurea | 103 | 29 |
| Apixabanbrand: Eliquis | 52 | 12 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 34 | 12 |
| Oxycodone Hcl | 28 | — |
| Ropeginterferon Alfa-2b-Njftbrand: Besremi | 25 | — |
| Hydromorphone Hcl | 18 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$26 across 1 record (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
- 2008-11-22
- Last updated
- 2013-06-28
Frequently asked questions
- What is Siayareh Rambally's NPI number?
- Siayareh Rambally's National Provider Identifier (NPI) is 1811142581, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siayareh Rambally's specialty?
- Siayareh Rambally is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Siayareh Rambally located?
- Siayareh Rambally's practice location on file with NPPES is 5323 Harry Hines Blvd, Dallas, TX 75390-7201.
- What is Siayareh Rambally's phone number?
- The practice phone number listed in the NPPES registry for Siayareh Rambally is (214) 645-4673.
- Does Siayareh Rambally accept Medicare?
- Siayareh Rambally is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siayareh Rambally's NPI active?
- Yes — Siayareh Rambally's NPI (1811142581) is active in the NPPES registry as of the last update on 2013-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.