Ana Diaz, MD
Internal Medicine Physician · Newark, NJ
Ana Diaz, MD is an internal medicine physician with a practice address in Newark, New Jersey, and NPI 1093344939, issued on Apr 3, 2020. Check the license (New Jersey 25MA11897600, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Ana Diaz
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 25MA11897600 NJ
Self-reported in NPPES; status is on the state search - Practice location
- 185 S Orange Ave, Newark, NJ 07103
- Phone
- (973) 972-2900
- Enumerated
- Apr 3, 2020
- Record last updated
- Jan 25, 2024
- Medicare enrollment
- Enrolled (PECOS I20230727000348); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 4,632 in New Jersey → Look up another NPI →
Also registered at 185 S Orange Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Ana Diaz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA11897600Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average internal medicine physician in 2024
615 Medicare Part D claims for 102 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium66 claims
- Metformin Hcl52 claims
- Lisinopril45 claims
- Albuterol Sulfate Hfa26 claims
- Amlodipine Besylate26 claims
- Ozempic19 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 2 group practices
- Newark Community Health Centers IncNewark, NJ
- University Physician Associates OF New Jersey IncNewark, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ana Diaz among 4,632 internal medicine physician records in New Jersey
Ana Diaz, MD is one of 4,632 internal medicine physician records with a practice address in New Jersey. 82% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 89% of them.
- NPI issued2020 · 89% of these records are older, 8% newer
- In a Medicare fileYes · 82% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2020 · median 2000 among the 3,132 with a school on file
- Record last updated2024 · 63% 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 New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
184 internal medicine physician records list a practice address in Newark
They are 184 of the 4,875 NPPES records with a practice address in Newark, and 4,632 internal medicine physician records in New Jersey.
All 4,632 in New Jersey → Every provider in Newark → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
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- Mary Cantey, M.D.Newark, NJ 071031851422687
- Dorothy Castro, MDNewark, NJ 071031982848297
- Irene Hao, MDNewark, NJ 071031598807521
- Iris Herrera, M.D.Newark, NJ 071031457446643
- Neil Kothari, M.D.Newark, NJ 071031639100233
- Ana Natale-Pereira, M.D.Newark, NJ 071031215949342
Common questions
What is Ana Diaz, MD's NPI number?
Ana Diaz, MD's National Provider Identifier (NPI) is 1093344939, issued on Apr 3, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Ana Diaz, MD located?
The NPPES record lists a practice address at 185 S Orange Ave, Newark, NJ, 07103. Phone: (973) 972-2900. Providers update this record themselves, so call before visiting.
How can I verify Ana Diaz, MD's license?
NPPES lists New Jersey license number 25MA11897600, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ana Diaz, MD prescribe under Medicare Part D?
In 2024, Ana Diaz, MD had 615 Medicare Part D claims for 102 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.