Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Mrs. Theresa Marie Gillis, PA-C

Individual provider Physician Assistant · NPI 1306024476

Mrs. Theresa Marie Gillis, PA-C is a Physician Assistant in Frederick, Maryland. Qualified in 1997, 29 years ago. Practices with Frederick Health Medical Group LLC, a 202-clinician group, works from 16 locations, accepts Medicare assignment and offers telehealth. Licensed in Maryland.

Years since qualifying
29
Licensed in
MD
In the registry since
2008
What do these letters mean?
PA-C — Physician Assistant, Certified
A physician assistant who holds current national certification.

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Practice location Address checks out

68 Thomas Johnson Dr Ste C
Frederick, MD 21702-4300
Phone: (301) 694-5292
Fax: (301) 694-2319
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (15)

  • 1194 Dutchmans Creek Dr, Brunswick, MD 21716-9786 — (240) 215-6310
  • 16403 Old Emmitsburg Rd, Emmitsburg, MD 21727-8929 — (240) 215-6310
  • 400 W 7th St, Frederick, MD 21701-4506 — (240) 215-6310
  • 1 Frederick Health Way, Frederick, MD 21701-9435 — (240) 215-6310
  • 141 Thomas Johnson Dr, Frederick, MD 21702-4502 — (301) 846-0100
  • 75 Thomas Johnson Dr, Frederick, MD 21702-4895 — (240) 215-6310
  • 1562 Opossumtown Pike, Frederick, MD 21702-4920 — (240) 215-6310
  • 194 Thomas Johnson Dr, Frederick, MD 21702-4679 — (240) 215-6310
  • 7211 Bank Ct, Frederick, MD 21703-8483 — (240) 215-6310
  • 3430 Worthington Blvd, Frederick, MD 21704-7017 — (240) 215-6310
  • 230 W Patrick St, Frederick, MD 21701-6945 — (240) 215-6310
  • 501 W 7th St, Frederick, MD 21701-4586 — (240) 215-6310
  • 504 E Ridgeville Blvd, Mount Airy, MD 21771-5942 — (240) 215-6310
  • 3000d Ventrie Ct, Myersville, MD 21773-7817 — (240) 215-6310
  • 15 E Frederick St, Walkersville, MD 21793-8234 — (240) 215-6310

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence C0003401 (MD)

Record details

NPI number1306024476
Entity typeIndividual (Type 1)
GenderFemale
Credentials PA-C
Sole proprietorNo
NPI enumeratedJanuary 31, 2008
Last updated in NPPESMay 16, 2023
Certification dateMay 16, 2023

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 1997 (29 years in practice)
Group practice Frederick Health Medical Group Llc — 202 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations8 on file with Medicare

Other providers in Frederick