Jack Ackerman, DO
Internal Medicine Physician · San Jose, CA
Jack Ackerman, DO is an internal medicine physician with a practice address in San Jose, California, and NPI 1780794107, issued on Aug 30, 2006. Check the license (California 20A6210, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jack Ackerman
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 20A6210 CA
Self-reported in NPPES; status is on the state search - Practice location
- 227 N Jackson Ave, San Jose, CA 95116
- Phone
- (408) 347-2002
- Enumerated
- Aug 30, 2006
- Record last updated
- Mar 9, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (408) 347-2189
- Medicaid ID
- 00AX62100 CA
- Medicare enrollment
- Enrolled (PECOS I20050713001188); accepts Medicare assignment
- Medical or professional school
- At Still University Of Health Sciences, College Of Osteo Med, Kirksville, 1988
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 227 N Jackson Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jack Ackerman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A6210Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
85% more Medicare Part D claims than the average internal medicine physician in 2024
5,880 Medicare Part D claims for 794 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 183 claims were for opioids.
Most prescribed
- Atorvastatin Calcium322 claims
- Losartan Potassium269 claims
- Amlodipine Besylate252 claims
- Levothyroxine Sodium196 claims
- Metoprolol Succinate158 claims
- Gabapentin129 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $63.37
3 payments; by number, the most common kind was education; the largest payer was Pfizer Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- University Healthcare AllianceSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
428 internal medicine physician records list a practice address in San Jose
They are 428 of the 20,925 NPPES records with a practice address in San Jose, and 17,696 internal medicine physician records in California.
All 428 in San Jose → All 17,696 in California → Every provider in San Jose →
Other internal medicine physician records in California
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- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Jack Ackerman, DO's NPI number?
Jack Ackerman, DO's National Provider Identifier (NPI) is 1780794107, issued on Aug 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Jack Ackerman, DO located?
The NPPES record lists a practice address at 227 N Jackson Ave, San Jose, CA, 95116. Phone: (408) 347-2002. Providers update this record themselves, so call before visiting.
How can I verify Jack Ackerman, DO's license?
NPPES lists California license number 20A6210, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Jack Ackerman, DO prescribe under Medicare Part D?
In 2024, Jack Ackerman, DO had 5,880 Medicare Part D claims for 794 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.