Shanmuga Pudunagar Subbiah, MD
NPI 1699968503 · Hematology & Oncology Physician · Upland, CA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Shanmuga Pudunagar Subbiah, MD is a Hematology & Oncology Physician provider in Upland, CA (NPI 1699968503).
Provider details
- NPI number
- 1699968503
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A119729 (CA)
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
18 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
5,557 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 3,395 | $83 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 636 | $126 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 490 | $104 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 310 | $183 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 190 | $70 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Tamoxifen Citrate | 74 | 17 |
| Apixabanbrand: Eliquis | 74 | 15 |
| Gabapentin | 49 | 18 |
| Osimertinib Mesylatebrand: Tagrisso | 44 | — |
| Anastrozole | 43 | 13 |
| Prednisone | 41 | 14 |
| Ondansetron Hcl | 35 | 23 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$10,171 across 81 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
- 2007-08-23
- Last updated
- 2025-07-17
- Certified
- 2025-07-17
Frequently asked questions
- What is Shanmuga Pudunagar Subbiah's NPI number?
- Shanmuga Pudunagar Subbiah's National Provider Identifier (NPI) is 1699968503, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Shanmuga Pudunagar Subbiah's specialty?
- Shanmuga Pudunagar Subbiah is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Shanmuga Pudunagar Subbiah located?
- Shanmuga Pudunagar Subbiah's practice location on file with NPPES is 1100 San Bernardino Rd Ste 1100, Upland, CA 91786-4952.
- What is Shanmuga Pudunagar Subbiah's phone number?
- The practice phone number listed in the NPPES registry for Shanmuga Pudunagar Subbiah is (909) 949-2242.
- Does Shanmuga Pudunagar Subbiah accept Medicare?
- Shanmuga Pudunagar Subbiah is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Shanmuga Pudunagar Subbiah's NPI active?
- Yes — Shanmuga Pudunagar Subbiah's NPI (1699968503) is active in the NPPES registry as of the last update on 2025-07-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.