Gnanam Thambi Pillai, MD
NPI 1255346730 · Internal Medicine Physician · Dayton, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gnanam Thambi Pillai, MD is a Internal Medicine Physician provider in Dayton, OH (NPI 1255346730).
Provider details
- NPI number
- 1255346730
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 35-090192 (OH)
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 tenure28% of score
19 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
908 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 385 | $113 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 246 | $74 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 140 | $108 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 137 | $164 |
Typical Medicare-allowed amounts for these services range $74–$164 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 35 | 34 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 27 | 27 |
| Furosemide | 26 | 24 |
| Methocarbamol | 26 | 26 |
| Amlodipine Besylate | 25 | 14 |
| Losartan Potassium | 19 | 19 |
| Potassium Chloride | 19 | 18 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-31
- Last updated
- 2019-09-05
Frequently asked questions
- What is Gnanam Thambi Pillai's NPI number?
- Gnanam Thambi Pillai's National Provider Identifier (NPI) is 1255346730, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gnanam Thambi Pillai's specialty?
- Gnanam Thambi Pillai is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gnanam Thambi Pillai located?
- Gnanam Thambi Pillai's practice location on file with NPPES is 33 W Rahn Rd, Dayton, OH 45429-2219.
- What is Gnanam Thambi Pillai's phone number?
- The practice phone number listed in the NPPES registry for Gnanam Thambi Pillai is (937) 433-8990.
- Does Gnanam Thambi Pillai accept Medicare?
- Gnanam Thambi Pillai is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gnanam Thambi Pillai's NPI active?
- Yes — Gnanam Thambi Pillai's NPI (1255346730) is active in the NPPES registry as of the last update on 2019-09-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.