Nathaniel Ratnasamy, M. D.
NPI 1558363317 · Infectious Disease Physician · Findlay, OH
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel Ratnasamy, M. D. is a Infectious Disease Physician provider in Findlay, OH (NPI 1558363317).
Provider details
- NPI number
- 1558363317
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M. D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35082006 (OH)
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
20 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
1,110 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 | 331 | $74 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 285 | $85 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 146 | $9 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 127 | $163 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 86 | $53 |
| New Patient Office Or Other Outpatient Visit With Low Level of Medical 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 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Cephalexin | 100 | 32 |
| Doxycycline Hyclate | 77 | 32 |
| Elviteg/Cob/Emtri/Tenof Alafenbrand: Genvoya | 56 | — |
| Emtricitabine/Tenofov Alafenambrand: Descovy | 56 | — |
| Dolutegravir Sodium/Lamivudinebrand: Dovato | 54 | — |
| Raltegravir Potassiumbrand: Isentress | 46 | — |
| Ritonavir | 44 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$41,245 across 43 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
- 2005-08-11
- Last updated
- 2018-07-11
Frequently asked questions
- What is Nathaniel Ratnasamy's NPI number?
- Nathaniel Ratnasamy's National Provider Identifier (NPI) is 1558363317, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel Ratnasamy's specialty?
- Nathaniel Ratnasamy is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel Ratnasamy located?
- Nathaniel Ratnasamy's practice location on file with NPPES is 1818 Chapel Dr Ste C, Findlay, OH 45840.
- What is Nathaniel Ratnasamy's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel Ratnasamy is (419) 429-7637.
- Does Nathaniel Ratnasamy accept Medicare?
- Nathaniel Ratnasamy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathaniel Ratnasamy's NPI active?
- Yes — Nathaniel Ratnasamy's NPI (1558363317) is active in the NPPES registry as of the last update on 2018-07-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.