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

Dr. Philip Nathanael Isenberg, MD

Individual provider Internal Medicine Physician · NPI 1134315872

Dr. Philip Nathanael Isenberg, MD practises Internal Medicine in Port Orchard, Washington. Graduated from Loma Linda University School of Medicine in 2005, 21 years ago. Practices with Kaiser Foundation Health Plan of Washington, a 1,519-clinician group, accepts Medicare assignment and offers telehealth. Licensed in Washington.

Years since qualifying
21
Trained at
Loma Linda University School of Medicine
Licensed in
WA
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1400 Pottery Ave
Port Orchard, WA 98366-3711
Phone: (360) 895-5000
Fax: (360) 895-5034
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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 MD61384642 (WA)
Pediatrics Physician Taxonomy 208000000X · Licence MD61384642 (WA)

Record details

NPI number1134315872
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 17, 2007
Last updated in NPPESSeptember 29, 2026
Certification dateSeptember 29, 2026

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolLOMA LINDA UNIVERSITY SCHOOL OF MEDICINE
Graduated 2005 (21 years in practice)
Group practice Kaiser Foundation Health Plan Of Washington — 1519 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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.

Removal of nail tissue 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 patients85
Services billed 817 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.

  • Kaiser Permanente Central Hospital Hospital · Seattle, WA
  • St Michael Medical Center Hospital · Silverdale, WA
  • Centerwell Home Health Home health agency · Silverdale, WA
  • Kaiser Permanente Home Health And Hospice Home health agency · Seattle, WA

Colleagues at Kaiser Foundation Health Plan of Washington

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 1519 clinicians in the practice; 12 are shown here.

Other providers in Port Orchard