Joel Christopher Acab, MD
Internal Medicine Physician · Walnut Creek, CA
Joel Christopher Acab, MD is an internal medicine physician with a practice address in Walnut Creek, California, and NPI 1518405661, issued on Feb 9, 2017. Check the license (California A169809, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Joel Christopher Acab
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A169809 CA
125071560 IL
Self-reported in NPPES; status is on the state search - Practice location
- 320 Lennon LN, Walnut Creek, CA 94598
- Phone
- (925) 906-2040
- Enumerated
- Feb 9, 2017
- Record last updated
- Jul 21, 2022
- Medicare enrollment
- Enrolled (PECOS I20210112001744); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 320 Lennon LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Joel Christopher Acab in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A169809Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% more Medicare Part D claims than the average internal medicine physician in 2024
5,637 Medicare Part D claims for 789 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. 102 claims were for opioids.
Most prescribed
- Atorvastatin Calcium445 claims
- Amlodipine Besylate246 claims
- Losartan Potassium244 claims
- Levothyroxine Sodium205 claims
- Lisinopril185 claims
- Fluticasone Propionate161 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.
Bills Medicare through one group practice
- Permanente Medical Group IncWalnut Creek, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Joel Christopher Acab among 17,696 internal medicine physician records in California
Joel Christopher Acab, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 81% of them.
- NPI issued2017 · 81% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2017 · median 2004 among the 11,065 with a school on file
- Record last updated2022 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
183 internal medicine physician records list a practice address in Walnut Creek
They are 183 of the 6,170 NPPES records with a practice address in Walnut Creek, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Walnut Creek → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Anthony Bernens, MDWalnut Creek, CA 945981215983440
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- Lisa Craig, MDWalnut Creek, CA 945981699853754
- Jaya Francis, MDWalnut Creek, CA 945981962580548
- Tarannum Guller, MDWalnut Creek, CA 945981972532083
- Noushin Haddad-Tehrani, MDWalnut Creek, CA 945981215988878
- Waheeda Hiller, MDWalnut Creek, CA 945981689642233
Common questions
What is Joel Christopher Acab, MD's NPI number?
Joel Christopher Acab, MD's National Provider Identifier (NPI) is 1518405661, issued on Feb 9, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Joel Christopher Acab, MD located?
The NPPES record lists a practice address at 320 Lennon LN, Walnut Creek, CA, 94598. Phone: (925) 906-2040. Providers update this record themselves, so call before visiting.
How can I verify Joel Christopher Acab, MD's license?
NPPES lists California license number A169809, 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 Joel Christopher Acab, MD prescribe under Medicare Part D?
In 2024, Joel Christopher Acab, MD had 5,637 Medicare Part D claims for 789 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.