Patrick Dunleavy Farrell, D.O.
Family Medicine Physician · Frederick, MD
Patrick Dunleavy Farrell, D.O. is a family medicine physician with a practice address in Frederick, Maryland, and NPI 1053765487, issued on Apr 22, 2016. Check the license (Maryland H0098041, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- Patrick Dunleavy Farrell
- Credential
- D.O.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- H0098041 MD
125069142 IL
2018020870 MO
Self-reported in NPPES; status is on the state search - Practice location
- 9093 Ridgefield Dr Ste 104, Frederick, MD 21701
- Phone
- (301) 682-4100
- Enumerated
- Apr 22, 2016
- Record last updated
- Sep 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20230925003333); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,912 in Maryland → Look up another NPI →
Also registered at 9093 Ridgefield Dr Ste 104
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Patrick Dunleavy Farrell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license H0098041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
55% fewer Medicare Part D claims than the average family medicine physician in 2024
1,583 Medicare Part D claims for 219 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium114 claims
- Levothyroxine Sodium81 claims
- Rosuvastatin Calcium57 claims
- Lisinopril54 claims
- Amlodipine Besylate46 claims
- Metoprolol Succinate45 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: $675.33
40 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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 one group practice
- Frederick Health Hospital IncFrederick, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Patrick Dunleavy Farrell among 1,912 family medicine physician records in Maryland
Patrick Dunleavy Farrell, D.O. is one of 1,912 family medicine physician records with a practice address in Maryland. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 80% of them.
- NPI issued2016 · 80% of these records are older, 18% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2017 · median 2004 among the 1,141 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 Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
65 family medicine physician records list a practice address in Frederick
They are 65 of the 3,981 NPPES records with a practice address in Frederick, and 1,912 family medicine physician records in Maryland.
All 1,912 in Maryland → Every provider in Frederick → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- James Amerena, M.D.Frederick, MD 217011912981929
- Janet Ciarkowski, M.D.Frederick, MD 217011366426371
- Irfan Hassen, M.D.Frederick, MD 217011073538849
- Matthew Lopiano, MDFrederick, MD 217011275283707
- Mariam Nejati, MDFrederick, MD 217011285098574
- Joseph Ashwal, M.D.Frederick, MD 217021508840026
- Barbara Brookmyer, M.D.Frederick, MD 217021548259203
- Gerard Delgrippo, M.D.Frederick, MD 217021447233234
Common questions
What is Patrick Dunleavy Farrell, D.O.'s NPI number?
Patrick Dunleavy Farrell, D.O.'s National Provider Identifier (NPI) is 1053765487, issued on Apr 22, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Patrick Dunleavy Farrell, D.O. located?
The NPPES record lists a practice address at 9093 Ridgefield Dr Ste 104, Frederick, MD, 21701. Phone: (301) 682-4100. Providers update this record themselves, so call before visiting.
How can I verify Patrick Dunleavy Farrell, D.O.'s license?
NPPES lists Maryland license number H0098041, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Patrick Dunleavy Farrell, D.O. prescribe under Medicare Part D?
In 2024, Patrick Dunleavy Farrell, D.O. had 1,583 Medicare Part D claims for 219 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.