Siddhartha Ganguly, M.D.
NPI 1689767261 · Hematology (Internal Medicine) Physician · Houston, TX
Enrolled with Medicare as Practitioner - Hematology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Siddhartha Ganguly, M.D. is a Hematology (Internal Medicine) Physician provider in Houston, TX (NPI 1689767261).
Provider details
- NPI number
- 1689767261
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 25693 (KS)
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
19 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
365 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 | 117 | $129 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 98 | $79 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 81 | $119 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 36 | $91 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 21 | $50 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 7 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Valacyclovir Hclbrand: Valacyclovir | 72 | 14 |
| Lenalidomide | 71 | — |
| Lenalidomidebrand: Revlimid | 42 | — |
| Ruxolitinib Phosphatebrand: Jakafi | 30 | — |
| Dexamethasone | 30 | — |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 16 | — |
| Gabapentin | 13 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,204 across 3 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
- 2006-10-02
- Last updated
- 2021-10-01
- Certified
- 2021-09-16
Frequently asked questions
- What is Siddhartha Ganguly's NPI number?
- Siddhartha Ganguly's National Provider Identifier (NPI) is 1689767261, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Siddhartha Ganguly's specialty?
- Siddhartha Ganguly is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Siddhartha Ganguly located?
- Siddhartha Ganguly's practice location on file with NPPES is 6445 Main Street, Houston, TX 77030.
- What is Siddhartha Ganguly's phone number?
- The practice phone number listed in the NPPES registry for Siddhartha Ganguly is (713) 441-9948.
- Does Siddhartha Ganguly accept Medicare?
- Siddhartha Ganguly is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Siddhartha Ganguly's NPI active?
- Yes — Siddhartha Ganguly's NPI (1689767261) is active in the NPPES registry as of the last update on 2021-10-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.