Theresa A. Dyar, D.O.
Family Medicine Physician · Lancaster, OH
Theresa A. Dyar, D.O. is a family medicine physician with a practice address in Lancaster, Ohio, and NPI 1043404932, issued on Sep 4, 2007. Check the license (Ohio 34.009958, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.
- Name
- Theresa A. Dyar
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 34.009958 OH
Self-reported in NPPES; status is on the state search - Practice location
- 2405 N Columbus St Ste 200, Lancaster, OH 43130
- Phone
- (740) 689-3627
- Enumerated
- Sep 4, 2007
- Record last updated
- Jul 13, 2023
- Fax
- (740) 687-5898
- Medicare enrollment
- Enrolled (PECOS I20100913001067); accepts Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2007
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 5,606 in Ohio → Look up another NPI →
Also registered at 2405 N Columbus St Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jason Montgomery, PACPhysician Assistant1447410980
- Steven Mould, MDCardiovascular Disease Physician1427519438
- Christie RatliffFamily Nurse Practitioner1457911521
- Andrew StiffCardiovascular Disease Physician1053687525
Verify Theresa A. Dyar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersState Medical Board of Ohio
Search for license 34.009958Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% more Medicare Part D claims than the average family medicine physician in 2024
4,148 Medicare Part D claims for 349 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 95 claims were for opioids.
Most prescribed
- Levothyroxine Sodium247 claims
- Atorvastatin Calcium193 claims
- Omeprazole124 claims
- Losartan Potassium116 claims
- Pantoprazole Sodium116 claims
- Gabapentin114 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $1,017.91
60 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Arbor View Family Medicine Inc.Lancaster, OH
- Fairfield Community Health CenterLancaster, OH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Theresa A. Dyar among 5,606 family medicine physician records in Ohio
Theresa A. Dyar, D.O. is one of 5,606 family medicine physician records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 52% of them.
- NPI issued2007 · 52% of these records are older, 40% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2007 · median 2005 among the 3,510 with a school on file
- Record last updated2023 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
50 family medicine physician records list a practice address in Lancaster
They are 50 of the 1,601 NPPES records with a practice address in Lancaster, and 5,606 family medicine physician records in Ohio.
All 5,606 in Ohio → Every provider in Lancaster → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Mark Aebi, M.D.Lancaster, OH 431301760461693
- Sarah Alley, M.D.Lancaster, OH 431301902882095
- Scott Baker, M.D.Lancaster, OH 431301235118209
- Ryan Dammerman, MDLancaster, OH 431301932181153
- Kevin Frank, M.D.Lancaster, OH 431301689677874
- Joseph Ginty, MDLancaster, OH 431301033197132
- Michelle Graham, MDLancaster, OH 431301164408258
- Kent Guisinger, DOLancaster, OH 431301619955325
Common questions
What is Theresa A. Dyar, D.O.'s NPI number?
Theresa A. Dyar, D.O.'s National Provider Identifier (NPI) is 1043404932, issued on Sep 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Theresa A. Dyar, D.O. located?
The NPPES record lists a practice address at 2405 N Columbus St Ste 200, Lancaster, OH, 43130. Phone: (740) 689-3627. Providers update this record themselves, so call before visiting.
How can I verify Theresa A. Dyar, D.O.'s license?
NPPES lists Ohio license number 34.009958, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Theresa A. Dyar, D.O. prescribe under Medicare Part D?
In 2024, Theresa A. Dyar, D.O. had 4,148 Medicare Part D claims for 349 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.