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

Jack Ackerman, DO

Individual provider Internal Medicine Physician · NPI 1780794107

Jack Ackerman, DO practises Internal Medicine in San Jose, California. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1988, 38 years ago. Practices with University Healthcare Alliance, a 332-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
38
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
CA
In the registry since
2006
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

227 N Jackson Ave
San Jose, CA 95116-1603 Not confirmed with CMS for 10 years — call before visiting
Phone: (408) 347-2002
Fax: (408) 347-2189
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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 20A6210 (CA)
Hospitalist Physician Taxonomy 208M00000X · Licence 20A6210 (CA)

Record details

NPI number1780794107
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedAugust 30, 2006
Last updated in NPPESMarch 9, 2016

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1988 (38 years in practice)
Group practice University Healthcare Alliance — 332 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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 patients706
Services billed 1,999 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

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 University Healthcare Alliance

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 332 clinicians in the practice; 12 are shown here.

Other providers in San Jose