Dr. Nathaniel A. J. Ratnasamy, MD
- Medicare services, 2024
- 1,110
- Medicare patients, 2024
- 293
- Part D claims, 2024
- 1,242
- MIPS score, 2024
- 72
- Hospital affiliations
- 5
- Practice address
- 1900 South Main Street, Findlay, OH 45840
- Practice phone
- Call (419) 423-4500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Ratnasamy's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nathaniel A. J. Ratnasamy is an infectious disease specialist in Findlay, Ohio
Dr. Ratnasamy practices at Blanchard Valley Hospital in Findlay, Ohio, part of Blanchard Valley Health System.
Dr. Ratnasamy's NPI, 1558363317, was assigned on August 11, 2005. Dr. Ratnasamy graduated from University of North Dakota School of Medicine in 1989. Dr. Ratnasamy holds Ohio license 35082006.
- NPI
- 1558363317NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214973353
- NPI enumeration date
- August 11, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (419) 423-4500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 63
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nathaniel A. J. Ratnasamy practices at Blanchard Valley Hospital in Findlay, Ohio
Dr. Ratnasamy's primary practice is Blanchard Valley Hospital, at 1900 South Main Street, Findlay, OH 45840 in Hancock County. The practice phone is (419) 423-4500.
- Blanchard Valley Hospital1900 South Main Street, Findlay, OH 45840 · Hancock CountyPhone(419) 423-4500
Source: Dmand AI Affiliation Data
Dr. Nathaniel A. J. Ratnasamy is affiliated with 7 sites of care and 1 medical group
Dr. Ratnasamy's primary practice is Blanchard Valley Hospital in Findlay, Ohio, part of Blanchard Valley Health System. Dr. Ratnasamy is also affiliated with Wood County Hospital. The medical group on file is Blanchard Valley Medical Practices. Dmand AI also links Dr. Ratnasamy to 3 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nathaniel A. J. Ratnasamy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ratnasamy practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Blanchard Valley Hospital | Available with a free account |
| +6 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Blanchard Valley Health System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Nathaniel A. J. Ratnasamy is one of 319 infectious disease specialists in Ohio
Infectious disease is Dr. Ratnasamy's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Ratnasamy is licensed in Ohio.
Specialties and state licenses
- Infectious disease, OhioPrimary
Infectious disease specialists near Dr. Ratnasamy
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nathaniel A. J. Ratnasamy billed Medicare for 1,110 services in 2024
CMS data shows 1,110 Medicare services from Dr. Ratnasamy across 8 procedure codes in 2024, for 293 Medicare patients. Medicare paid $70,217 for them.
Dr. Ratnasamy's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8422024: 96414%
- Surgery
- 2023: 1172024: 14625%
Where Dr. Ratnasamy's Medicare services took place, 2024
- In an office60354%
- In a facility50746%
Dr. Ratnasamy compared with the Ohio median for infectious disease specialists, 2024
- Dr. Ratnasamy
- Ohio median
- Medicare services
- 1,110vs 3613.1 times
- Medicare patients
- 293vs 1442.0 times
- Part D claims
- 1,002vs 2204.6 times
Medians across 312 infectious disease specialists in Ohio with Dmand AI profiles that report each measure.
Dr. Ratnasamy's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nathaniel A. J. Ratnasamy treated 293 Medicare patients in 2024, average age 73
CMS counts 293 Medicare patients who saw Dr. Ratnasamy in 2024. The largest group is 65 to 74, with 120 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.63, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Ratnasamy's median patient age at 67, with 49% women.
Dr. Ratnasamy's Medicare patients by age, 2024
Dr. Ratnasamy's Medicare patients by sex, 2024
- Women14951%
- Men14449%
Chronic conditions among Dr. Ratnasamy's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis66%
- Chronic kidney disease51%
- Diabetes44%
- Ischemic heart disease44%
- Mood disorders41%
- Anxiety39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ratnasamy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 67
Patient panel by sex, all payers
- Women49%
- Men50%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Nathaniel A. J. Ratnasamy wrote 1,242 Medicare Part D claims in 2024
In 2024, Dr. Ratnasamy wrote 1,242 Medicare Part D claims for 227 patients. 73% of them were for generic drugs. CMS names the drug for 1,002 of them, across 32 drugs with 11 or more claims each, at $1,087,896 in total drug cost. In 2023, CMS named 1,135 claims across 37 drugs.
Dr. Ratnasamy's Part D claims by kind of drug, 2024
- Generic904 claims73%
- Brand-name338 claims27%
Dr. Ratnasamy's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Ratnasamy's Part D claims, 2024
- Antibiotics43%539 of 1,242 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,1352024: 1,00212%
Drugs named by CMS: 32 in 2024, 37 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Nathaniel A. J. Ratnasamy scored 72 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 72 out of 100 for Dr. Ratnasamy for performance year 2024, reported as part of a group. Dr. Ratnasamy accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Ratnasamy as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Ratnasamy's MIPS scores, performance year 2024
- 72of 100Final score
- 52.4of 100Quality
- 84of 100Promoting Interoperability
- 40of 100Improvement Activities
- 66of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Nathaniel A. J. Ratnasamy received $358,447 in industry payments from 2016 to 2025
CMS Open Payments shows 263 general payments to Dr. Ratnasamy from 22 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 99% of the total. Takeda Pharmaceuticals U.S.A., Inc. paid the most, $216,465.
General payments to Dr. Ratnasamy by program year, 2016 to 2025
General payments to Dr. Ratnasamy by kind, 2016 to 2025
- Consulting fees$354,53299%
- Food and beverage$2,5801%
- Travel and lodging$1,0460%
- Education$2890%
Companies that paid Dr. Ratnasamy the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Nathaniel A. J. Ratnasamy graduated from University of North Dakota School of Medicine
Dr. Ratnasamy graduated from University of North Dakota School of Medicine in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Nathaniel A. J. Ratnasamy's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nathaniel A. J. Ratnasamy
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nathaniel A. J. Ratnasamy's NPI number?
Dr. Nathaniel A. J. Ratnasamy's NPI number is 1558363317. It was assigned on August 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Nathaniel A. J. Ratnasamy?
Dr. Nathaniel A. J. Ratnasamy is an infectious disease specialist in Findlay, Ohio. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Nathaniel A. J. Ratnasamy practice?
Dr. Ratnasamy practices at 1900 South Main Street, Findlay, OH 45840. Dr. Ratnasamy's primary practice is Blanchard Valley Hospital in Findlay, Ohio, part of Blanchard Valley Health System. Dmand AI also links Dr. Ratnasamy to 3 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Nathaniel A. J. Ratnasamy's office phone number?
The practice phone on file for Dr. Ratnasamy is (419) 423-4500.
What is Dr. Nathaniel A. J. Ratnasamy's medical license number?
Dr. Ratnasamy holds Ohio license 35082006.
Which hospitals is Dr. Nathaniel A. J. Ratnasamy affiliated with?
Dr. Ratnasamy practices at Blanchard Valley Hospital in Findlay, Ohio. Dr. Ratnasamy is also affiliated with Wood County Hospital. Dmand AI links Dr. Ratnasamy to 3 more hospitals.
What medical group is Dr. Nathaniel A. J. Ratnasamy part of?
Dr. Ratnasamy is linked to Blanchard Valley Medical Practices.
Does Dr. Nathaniel A. J. Ratnasamy accept Medicare?
Yes. CMS data shows Dr. Ratnasamy billed Medicare for 1,110 services in 2024, and Dr. Ratnasamy accepts Medicare assignment.
Does Dr. Nathaniel A. J. Ratnasamy offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Ratnasamy as offering telehealth services.
What is Dr. Nathaniel A. J. Ratnasamy's MIPS score?
Dr. Ratnasamy's MIPS final score for performance year 2024 is 72 out of 100, reported as part of a group.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Nathaniel A. J. Ratnasamy see?
CMS counts 293 Medicare patients who saw Dr. Ratnasamy in 2024, with an average age of 73.
What services does Dr. Nathaniel A. J. Ratnasamy bill to Medicare?
In 2024, Dr. Ratnasamy's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99213) and surgery: heart and blood vessels (36415).
Where did Dr. Nathaniel A. J. Ratnasamy go to medical school?
Dr. Ratnasamy graduated from University of North Dakota School of Medicine in 1989.
What drugs does Dr. Nathaniel A. J. Ratnasamy prescribe most?
In 2024 Medicare Part D data, Dr. Ratnasamy's most prescribed drugs by claims were Cephalexin, Doxycycline Hyclate and Descovy.
Has Dr. Nathaniel A. J. Ratnasamy received payments from drug or device companies?
CMS Open Payments shows $358,447 in general payments to Dr. Ratnasamy from 22 companies from 2016 to 2025. The largest total came from Takeda Pharmaceuticals U.S.A., Inc.
How long has Dr. Nathaniel A. J. Ratnasamy been practicing?
Dr. Ratnasamy graduated from medical school in 1989, 37 years ago.
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