Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Patrick Dunleavy Farrell, DO

Individual provider Family Medicine Physician · NPI 1053765487

Dr. Patrick Dunleavy Farrell, DO is a Family Medicine Physician in Frederick, Maryland. Works from 5 locations. Licensed in Illinois, Maryland and Missouri.

Licensed in
IL, MD, MO
In the registry since
2016
Specialties on file
3
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

9093 Ridgefield Dr Ste 104
Frederick, MD 21701-6711
Phone: (301) 682-4100
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (4)

  • 180 S 3rd St, Belleville, IL 62220-1952 — (618) 233-5480
  • 3 Saint Elizabeth Blvd Ste 4000, O Fallon, IL 62269 — (618) 233-5480
  • 100 Medical Plz, Lake St Louis, MO 63367-1366 — (636) 625-5200
  • 300 1st Capitol Dr, Saint Charles, MO 63301-2844 — (636) 947-5000

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence H0098041 (MD)
Family Medicine Physician Taxonomy 207Q00000X · Licence 2018020870 (MO)
Family Medicine Physician Taxonomy 207Q00000X · Licence 125069142 (IL)

Record details

NPI number1053765487
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedApril 22, 2016
Last updated in NPPESSeptember 26, 2023
Certification dateSeptember 26, 2023
Mailing address3 Saint Elizabeth Blvd Ste 4000, O Fallon, IL 62269-1284

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