Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Maxwell Isaac, DO

Individual provider Internal Medicine Physician · NPI 1851918346

Maxwell Isaac, DO practises Internal Medicine in Philadelphia, Pennsylvania. Graduated from William Carey University College of Osteopathic Medicine in 2020, 6 years ago. Practices with Main Line Healthcare, a 1,153-clinician group and accepts Medicare assignment. Licensed in Missouri and Pennsylvania.

Years since qualifying
6
Trained at
William Carey University College of Osteopathic Medicine
Licensed in
MO, PA
In the registry since
2020
Specialties on file
2
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.

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Practice location Address checks out

1020 Walnut St
Philadelphia, PA 19107-5567
Phone: (573) 884-1606
Show map & directions

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

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence OS022944 (PA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 2020019336 (MO)

Record details

NPI number1851918346
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedJune 30, 2020
Last updated in NPPESJune 29, 2023
Certification dateJune 29, 2023

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolWILLIAM CAREY UNIVERSITY COLLEGE OF OSTEOPATHIC MEDICINE
Graduated 2020 (6 years in practice)
Group practice Main Line Healthcare — 1153 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Upper gastrointestinal (GI) endoscopy for acid reflux 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients97
Services billed 128 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Main Line Healthcare

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1153 clinicians in the practice; 12 are shown here.

Other providers in Philadelphia