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

Matthew Holzberg, DO

Individual provider Internal Medicine Physician · NPI 1194288647

Matthew Holzberg, DO practises Internal Medicine in Newark, Delaware. Graduated from Rowan University School of Osteopathic Medicine in 2019, 7 years ago. Practices with South Sound Inpatient Physicians PLLC, a 427-clinician group and accepts Medicare assignment. Licensed in Delaware, Maryland and Washington.

Years since qualifying
7
Trained at
Rowan University School of Osteopathic Medicine
Licensed in
DE, MD, WA
In the registry since
2019
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.

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Practice location Address checks out

4755 Ogletown Stanton Rd Ste 5A43
Newark, DE 19718-2200
Phone: (302) 623-0188
Fax: (302) 733-5640
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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 C2-0024879 (DE)
Internal Medicine Physician Taxonomy 207R00000X · Licence OP61246170 (WA)
Internal Medicine Physician Taxonomy 207R00000X · Licence H0105426 (MD)

Record details

NPI number1194288647
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedApril 11, 2019
Last updated in NPPESFebruary 2, 2026
Certification dateFebruary 2, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolROWAN UNIVERSITY SCHOOL OF OSTEOPATHIC MEDICINE
Graduated 2019 (7 years in practice)
Group practice South Sound Inpatient Physicians Pllc — 427 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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 patients289
Services billed 630 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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. Those with a page here are linked.

Colleagues at South Sound Inpatient Physicians PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 427 clinicians in the practice; 12 are shown here.

Other providers in Newark