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

Dr. Marissa Lara Ambron, DO

Individual provider Internal Medicine Physician · NPI 1518113570

Dr. Marissa Lara Ambron, DO is an Internal Medicine in Williamsport, Pennsylvania. Graduated from Philadelphia College of Osteopathic Medicine in 2008, 18 years ago. Practices with St Lukes Physician Group Inc, a 2,127-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
18
Trained at
Philadelphia College of Osteopathic Medicine
Licensed in
PA
In the registry since
2008
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

700 High St
Williamsport, PA 17701-3198
Phone: (570) 321-2850
Fax: (570) 321-2851
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence OS014928 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 0012720 (PA)
Hospitalist Physician Taxonomy 208M00000X · Licence OS014928 (PA)

Record details

NPI number1518113570
Entity typeIndividual (Type 1)
GenderFemale
Credentials DO
Sole proprietorNo
NPI enumeratedAugust 11, 2008
Last updated in NPPESJanuary 11, 2012

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolPHILADELPHIA COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2008 (18 years in practice)
Group practice St Lukes Physician Group Inc — 2127 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Other providers in Williamsport